/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 09:38:43,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 09:38:43,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 09:38:43,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 09:38:43,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 09:38:43,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 09:38:43,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 09:38:43,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 09:38:43,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 09:38:43,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 09:38:43,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 09:38:43,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 09:38:43,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 09:38:43,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 09:38:43,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 09:38:43,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 09:38:43,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 09:38:43,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 09:38:43,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 09:38:43,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 09:38:43,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 09:38:43,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 09:38:43,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 09:38:43,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 09:38:43,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 09:38:43,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 09:38:43,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 09:38:43,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 09:38:43,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 09:38:43,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 09:38:43,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 09:38:43,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 09:38:43,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 09:38:43,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 09:38:43,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 09:38:43,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 09:38:43,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 09:38:43,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 09:38:43,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 09:38:43,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 09:38:43,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 09:38:43,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 09:38:43,615 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 09:38:43,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 09:38:43,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 09:38:43,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 09:38:43,620 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 09:38:43,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 09:38:43,621 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 09:38:43,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 09:38:43,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 09:38:43,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 09:38:43,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 09:38:43,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 09:38:43,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 09:38:43,624 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 09:38:43,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 09:38:43,625 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 09:38:43,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 09:38:43,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 09:38:43,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 09:38:43,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 09:38:43,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 09:38:43,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:38:43,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 09:38:43,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 09:38:43,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 09:38:43,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 09:38:43,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 09:38:43,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 09:38:43,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 09:38:43,634 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 09:38:44,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 09:38:44,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 09:38:44,040 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 09:38:44,042 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 09:38:44,043 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 09:38:44,044 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label48.c [2020-10-13 09:38:44,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/baa5b5ae3/3f04ce9331404b40969237524dfa3c5b/FLAGa87976af1 [2020-10-13 09:38:44,947 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 09:38:44,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label48.c [2020-10-13 09:38:44,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/baa5b5ae3/3f04ce9331404b40969237524dfa3c5b/FLAGa87976af1 [2020-10-13 09:38:45,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/baa5b5ae3/3f04ce9331404b40969237524dfa3c5b [2020-10-13 09:38:45,070 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 09:38:45,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 09:38:45,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 09:38:45,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 09:38:45,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 09:38:45,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:38:45" (1/1) ... [2020-10-13 09:38:45,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1043d88d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:45, skipping insertion in model container [2020-10-13 09:38:45,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:38:45" (1/1) ... [2020-10-13 09:38:45,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 09:38:45,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 09:38:46,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:38:46,546 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 09:38:46,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:38:47,011 INFO L208 MainTranslator]: Completed translation [2020-10-13 09:38:47,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:47 WrapperNode [2020-10-13 09:38:47,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 09:38:47,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 09:38:47,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 09:38:47,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 09:38:47,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:47" (1/1) ... [2020-10-13 09:38:47,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:47" (1/1) ... [2020-10-13 09:38:47,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:47" (1/1) ... [2020-10-13 09:38:47,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:47" (1/1) ... [2020-10-13 09:38:47,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:47" (1/1) ... [2020-10-13 09:38:47,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:47" (1/1) ... [2020-10-13 09:38:47,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:47" (1/1) ... [2020-10-13 09:38:47,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 09:38:47,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 09:38:47,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 09:38:47,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 09:38:47,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:38:47,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 09:38:47,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 09:38:47,391 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 09:38:47,391 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 09:38:47,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 09:38:47,391 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 09:38:47,391 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 09:38:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 09:38:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 09:38:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 09:38:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 09:38:47,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 09:38:47,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 09:38:56,631 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 09:38:56,632 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 09:38:56,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:38:56 BoogieIcfgContainer [2020-10-13 09:38:56,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 09:38:56,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 09:38:56,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 09:38:56,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 09:38:56,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:38:45" (1/3) ... [2020-10-13 09:38:56,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e70775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:38:56, skipping insertion in model container [2020-10-13 09:38:56,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:47" (2/3) ... [2020-10-13 09:38:56,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e70775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:38:56, skipping insertion in model container [2020-10-13 09:38:56,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:38:56" (3/3) ... [2020-10-13 09:38:56,654 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label48.c [2020-10-13 09:38:56,668 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 09:38:56,679 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 09:38:56,695 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 09:38:56,729 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 09:38:56,729 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 09:38:56,729 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 09:38:56,729 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 09:38:56,729 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 09:38:56,730 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 09:38:56,730 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 09:38:56,730 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 09:38:56,764 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2020-10-13 09:38:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 09:38:56,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:38:56,776 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] [2020-10-13 09:38:56,777 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:38:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:38:56,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1279560273, now seen corresponding path program 1 times [2020-10-13 09:38:56,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:38:56,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316815771] [2020-10-13 09:38:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:38:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:57,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:57,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:57,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 09:38:57,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:57,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-13 09:38:57,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:57,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 09:38:57,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:38:57,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 09:38:57,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 09:38:57,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:38:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:57,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:57,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:57,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:38:57,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:57,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-13 09:38:57,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:57,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:38:57,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:57,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:38:57,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 09:38:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:38:57,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316815771] [2020-10-13 09:38:57,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:38:57,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 09:38:57,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493002343] [2020-10-13 09:38:57,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 09:38:57,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:38:57,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 09:38:57,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 09:38:57,828 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2020-10-13 09:39:11,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:39:11,358 INFO L93 Difference]: Finished difference Result 1689 states and 3086 transitions. [2020-10-13 09:39:11,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:39:11,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-13 09:39:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:39:11,392 INFO L225 Difference]: With dead ends: 1689 [2020-10-13 09:39:11,392 INFO L226 Difference]: Without dead ends: 1009 [2020-10-13 09:39:11,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:39:11,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2020-10-13 09:39:11,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 991. [2020-10-13 09:39:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2020-10-13 09:39:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1526 transitions. [2020-10-13 09:39:11,534 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1526 transitions. Word has length 49 [2020-10-13 09:39:11,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:39:11,535 INFO L479 AbstractCegarLoop]: Abstraction has 991 states and 1526 transitions. [2020-10-13 09:39:11,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 09:39:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1526 transitions. [2020-10-13 09:39:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 09:39:11,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:39:11,542 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] [2020-10-13 09:39:11,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 09:39:11,543 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:39:11,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:39:11,543 INFO L82 PathProgramCache]: Analyzing trace with hash -2065589273, now seen corresponding path program 1 times [2020-10-13 09:39:11,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:39:11,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436438908] [2020-10-13 09:39:11,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:39:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:11,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:12,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:13,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:13,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 09:39:13,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:39:13,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1568 [2020-10-13 09:39:13,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:13,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:39:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 09:39:13,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 09:39:13,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 09:39:13,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:39:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:13,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:13,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:13,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:39:13,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:13,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 09:39:13,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:13,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:39:13,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:13,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:39:13,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:39:13,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:39:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:13,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:13,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:13,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 09:39:13,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:13,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-13 09:39:13,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:13,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:39:13,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:13,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 09:39:13,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:39:13,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436438908] [2020-10-13 09:39:13,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:39:13,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:39:13,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464932329] [2020-10-13 09:39:13,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:39:13,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:39:13,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:39:13,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:39:13,510 INFO L87 Difference]: Start difference. First operand 991 states and 1526 transitions. Second operand 5 states. [2020-10-13 09:39:25,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:39:25,341 INFO L93 Difference]: Finished difference Result 2864 states and 4440 transitions. [2020-10-13 09:39:25,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:39:25,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-13 09:39:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:39:25,353 INFO L225 Difference]: With dead ends: 2864 [2020-10-13 09:39:25,353 INFO L226 Difference]: Without dead ends: 1879 [2020-10-13 09:39:25,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:39:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2020-10-13 09:39:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1875. [2020-10-13 09:39:25,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1875 states. [2020-10-13 09:39:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2566 transitions. [2020-10-13 09:39:25,417 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2566 transitions. Word has length 120 [2020-10-13 09:39:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:39:25,418 INFO L479 AbstractCegarLoop]: Abstraction has 1875 states and 2566 transitions. [2020-10-13 09:39:25,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:39:25,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2566 transitions. [2020-10-13 09:39:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 09:39:25,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:39:25,423 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] [2020-10-13 09:39:25,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 09:39:25,423 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:39:25,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:39:25,424 INFO L82 PathProgramCache]: Analyzing trace with hash -80619591, now seen corresponding path program 1 times [2020-10-13 09:39:25,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:39:25,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599390874] [2020-10-13 09:39:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:39:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:25,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:25,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:26,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:26,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 09:39:26,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:39:26,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-10-13 09:39:26,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:26,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 09:39:26,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:39:26,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-13 09:39:26,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:39:26,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:39:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:26,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:26,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:26,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:39:26,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:26,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 09:39:26,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:26,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:39:26,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:26,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:39:26,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:39:26,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:39:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:26,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:27,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:27,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 09:39:27,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:27,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-13 09:39:27,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 09:39:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 09:39:27,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 09:39:27,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:39:27,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599390874] [2020-10-13 09:39:27,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:39:27,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 09:39:27,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73777719] [2020-10-13 09:39:27,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 09:39:27,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:39:27,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 09:39:27,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-13 09:39:27,571 INFO L87 Difference]: Start difference. First operand 1875 states and 2566 transitions. Second operand 8 states. [2020-10-13 09:39:28,078 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-10-13 09:39:44,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:39:44,346 INFO L93 Difference]: Finished difference Result 3358 states and 4706 transitions. [2020-10-13 09:39:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 09:39:44,355 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-10-13 09:39:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:39:44,364 INFO L225 Difference]: With dead ends: 3358 [2020-10-13 09:39:44,364 INFO L226 Difference]: Without dead ends: 1455 [2020-10-13 09:39:44,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-13 09:39:44,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2020-10-13 09:39:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1436. [2020-10-13 09:39:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2020-10-13 09:39:44,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 1967 transitions. [2020-10-13 09:39:44,420 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 1967 transitions. Word has length 123 [2020-10-13 09:39:44,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:39:44,420 INFO L479 AbstractCegarLoop]: Abstraction has 1436 states and 1967 transitions. [2020-10-13 09:39:44,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 09:39:44,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 1967 transitions. [2020-10-13 09:39:44,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 09:39:44,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:39:44,433 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] [2020-10-13 09:39:44,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 09:39:44,433 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:39:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:39:44,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1363573369, now seen corresponding path program 1 times [2020-10-13 09:39:44,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:39:44,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544223112] [2020-10-13 09:39:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:39:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:44,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:44,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:44,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 09:39:44,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:44,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-13 09:39:44,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:44,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:39:44,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-13 09:39:44,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 09:39:44,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:44,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:39:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:44,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:44,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:44,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:39:44,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:44,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:39:44,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:44,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:39:44,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:44,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:39:44,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:45,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:39:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:45,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:45,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:45,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:39:45,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:45,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-13 09:39:45,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:45,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:39:45,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:45,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 09:39:45,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:39:45,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544223112] [2020-10-13 09:39:45,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:39:45,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:39:45,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551649331] [2020-10-13 09:39:45,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:39:45,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:39:45,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:39:45,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:39:45,158 INFO L87 Difference]: Start difference. First operand 1436 states and 1967 transitions. Second operand 5 states. [2020-10-13 09:39:58,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:39:58,247 INFO L93 Difference]: Finished difference Result 3332 states and 4903 transitions. [2020-10-13 09:39:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:39:58,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2020-10-13 09:39:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:39:58,261 INFO L225 Difference]: With dead ends: 3332 [2020-10-13 09:39:58,261 INFO L226 Difference]: Without dead ends: 2335 [2020-10-13 09:39:58,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:39:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2020-10-13 09:39:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 2332. [2020-10-13 09:39:58,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2332 states. [2020-10-13 09:39:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3146 transitions. [2020-10-13 09:39:58,322 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3146 transitions. Word has length 136 [2020-10-13 09:39:58,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:39:58,323 INFO L479 AbstractCegarLoop]: Abstraction has 2332 states and 3146 transitions. [2020-10-13 09:39:58,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:39:58,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3146 transitions. [2020-10-13 09:39:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-13 09:39:58,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:39:58,327 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:39:58,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 09:39:58,327 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:39:58,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:39:58,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1503406201, now seen corresponding path program 1 times [2020-10-13 09:39:58,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:39:58,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471097494] [2020-10-13 09:39:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:39:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:58,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:58,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:59,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:00,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:03,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:03,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-13 09:40:03,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:40:03,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4702 [2020-10-13 09:40:03,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:03,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:40:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-13 09:40:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 09:40:03,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:03,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:40:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:03,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:03,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:03,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:40:03,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:03,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:40:03,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:03,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:40:03,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:03,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:40:03,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:03,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:40:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:03,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:03,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:03,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:40:03,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:03,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 09:40:03,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:03,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:40:03,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:03,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:40:03,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:03,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 09:40:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:03,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:03,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:03,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 09:40:03,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:03,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-13 09:40:03,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:03,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:40:03,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:03,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 09:40:03,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 09:40:03,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471097494] [2020-10-13 09:40:03,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:40:03,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:40:03,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171762492] [2020-10-13 09:40:03,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:40:03,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:40:03,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:40:03,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:40:03,527 INFO L87 Difference]: Start difference. First operand 2332 states and 3146 transitions. Second operand 5 states. [2020-10-13 09:40:13,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:40:13,796 INFO L93 Difference]: Finished difference Result 4241 states and 5865 transitions. [2020-10-13 09:40:13,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:40:13,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2020-10-13 09:40:13,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:40:13,810 INFO L225 Difference]: With dead ends: 4241 [2020-10-13 09:40:13,811 INFO L226 Difference]: Without dead ends: 2332 [2020-10-13 09:40:13,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:40:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2020-10-13 09:40:13,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2332. [2020-10-13 09:40:13,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2332 states. [2020-10-13 09:40:13,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3144 transitions. [2020-10-13 09:40:13,886 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3144 transitions. Word has length 211 [2020-10-13 09:40:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:40:13,889 INFO L479 AbstractCegarLoop]: Abstraction has 2332 states and 3144 transitions. [2020-10-13 09:40:13,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:40:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3144 transitions. [2020-10-13 09:40:13,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-13 09:40:13,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:40:13,894 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:40:13,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 09:40:13,895 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:40:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:40:13,895 INFO L82 PathProgramCache]: Analyzing trace with hash -16459886, now seen corresponding path program 1 times [2020-10-13 09:40:13,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:40:13,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185283446] [2020-10-13 09:40:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:40:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:13,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:14,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:14,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:15,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:16,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:16,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-13 09:40:16,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:40:16,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2563 [2020-10-13 09:40:16,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:16,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:40:16,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-13 09:40:16,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 09:40:16,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:16,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:40:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:16,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:16,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:16,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:40:16,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:16,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:40:16,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:16,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:40:16,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:16,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:40:16,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:16,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:40:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:16,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:16,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:16,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:40:16,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:16,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 09:40:16,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:16,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:40:16,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:16,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:40:16,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:40:16,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 09:40:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:16,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:16,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:16,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 09:40:16,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:16,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-13 09:40:16,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:16,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:40:16,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:16,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 09:40:16,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-13 09:40:17,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185283446] [2020-10-13 09:40:17,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:40:17,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:40:17,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907224312] [2020-10-13 09:40:17,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:40:17,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:40:17,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:40:17,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:40:17,011 INFO L87 Difference]: Start difference. First operand 2332 states and 3144 transitions. Second operand 5 states. [2020-10-13 09:40:28,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:40:28,312 INFO L93 Difference]: Finished difference Result 4249 states and 5869 transitions. [2020-10-13 09:40:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:40:28,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2020-10-13 09:40:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:40:28,328 INFO L225 Difference]: With dead ends: 4249 [2020-10-13 09:40:28,328 INFO L226 Difference]: Without dead ends: 2332 [2020-10-13 09:40:28,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:40:28,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2020-10-13 09:40:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2332. [2020-10-13 09:40:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2332 states. [2020-10-13 09:40:28,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3142 transitions. [2020-10-13 09:40:28,388 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3142 transitions. Word has length 224 [2020-10-13 09:40:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:40:28,389 INFO L479 AbstractCegarLoop]: Abstraction has 2332 states and 3142 transitions. [2020-10-13 09:40:28,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:40:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3142 transitions. [2020-10-13 09:40:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-13 09:40:28,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:40:28,394 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:40:28,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 09:40:28,394 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:40:28,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:40:28,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1670674935, now seen corresponding path program 1 times [2020-10-13 09:40:28,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:40:28,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603218499] [2020-10-13 09:40:28,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:40:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:28,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:28,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:29,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:30,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:30,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 276 [2020-10-13 09:40:30,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:40:30,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1893 [2020-10-13 09:40:30,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:40:30,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 227 [2020-10-13 09:40:30,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 09:40:30,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:30,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:40:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:30,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:30,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:30,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:40:30,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:30,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:40:30,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:30,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:40:30,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:30,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:40:30,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:30,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:40:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:30,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:30,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:30,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:40:30,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:30,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 09:40:30,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:30,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:40:30,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:30,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:40:30,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:40:30,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 09:40:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:30,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:30,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:30,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 09:40:30,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:30,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-13 09:40:30,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:30,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:40:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-13 09:40:30,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-13 09:40:31,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603218499] [2020-10-13 09:40:31,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:40:31,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:40:31,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403634323] [2020-10-13 09:40:31,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:40:31,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:40:31,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:40:31,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:40:31,050 INFO L87 Difference]: Start difference. First operand 2332 states and 3142 transitions. Second operand 5 states. [2020-10-13 09:40:43,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:40:43,253 INFO L93 Difference]: Finished difference Result 4255 states and 5871 transitions. [2020-10-13 09:40:43,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:40:43,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 264 [2020-10-13 09:40:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:40:43,264 INFO L225 Difference]: With dead ends: 4255 [2020-10-13 09:40:43,265 INFO L226 Difference]: Without dead ends: 2332 [2020-10-13 09:40:43,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:40:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2020-10-13 09:40:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2332. [2020-10-13 09:40:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2332 states. [2020-10-13 09:40:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3140 transitions. [2020-10-13 09:40:43,335 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3140 transitions. Word has length 264 [2020-10-13 09:40:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:40:43,335 INFO L479 AbstractCegarLoop]: Abstraction has 2332 states and 3140 transitions. [2020-10-13 09:40:43,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:40:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3140 transitions. [2020-10-13 09:40:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-13 09:40:43,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:40:43,340 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:40:43,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 09:40:43,341 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:40:43,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:40:43,341 INFO L82 PathProgramCache]: Analyzing trace with hash 287424234, now seen corresponding path program 1 times [2020-10-13 09:40:43,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:40:43,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979028602] [2020-10-13 09:40:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:40:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:43,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:43,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:44,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:45,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:45,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-13 09:40:45,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:40:45,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1814 [2020-10-13 09:40:45,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:45,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:40:45,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 236 [2020-10-13 09:40:45,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 09:40:45,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:40:45,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:40:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:45,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:45,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:45,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:40:45,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:45,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 09:40:45,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:45,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:40:45,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:45,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:40:45,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:40:45,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:40:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:45,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:45,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:45,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:40:45,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:45,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 09:40:45,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:40:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:40:45,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:45,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 09:40:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:45,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:45,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:45,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 09:40:45,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:45,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-13 09:40:45,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:45,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:40:45,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:45,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-13 09:40:45,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-13 09:40:45,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979028602] [2020-10-13 09:40:45,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:40:45,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:40:45,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863637920] [2020-10-13 09:40:45,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:40:45,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:40:45,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:40:45,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:40:45,894 INFO L87 Difference]: Start difference. First operand 2332 states and 3140 transitions. Second operand 5 states. [2020-10-13 09:40:58,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:40:58,658 INFO L93 Difference]: Finished difference Result 4252 states and 5864 transitions. [2020-10-13 09:40:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:40:58,668 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 273 [2020-10-13 09:40:58,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:40:58,680 INFO L225 Difference]: With dead ends: 4252 [2020-10-13 09:40:58,681 INFO L226 Difference]: Without dead ends: 2332 [2020-10-13 09:40:58,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:40:58,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2020-10-13 09:40:58,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2332. [2020-10-13 09:40:58,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2332 states. [2020-10-13 09:40:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3138 transitions. [2020-10-13 09:40:58,743 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3138 transitions. Word has length 273 [2020-10-13 09:40:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:40:58,743 INFO L479 AbstractCegarLoop]: Abstraction has 2332 states and 3138 transitions. [2020-10-13 09:40:58,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:40:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3138 transitions. [2020-10-13 09:40:58,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-13 09:40:58,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:40:58,749 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:40:58,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 09:40:58,750 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:40:58,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:40:58,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1311003918, now seen corresponding path program 1 times [2020-10-13 09:40:58,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:40:58,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924839608] [2020-10-13 09:40:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:40:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:58,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:59,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:59,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:00,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:00,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-13 09:41:00,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:41:00,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1979 [2020-10-13 09:41:00,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:00,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:41:00,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 240 [2020-10-13 09:41:00,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 09:41:00,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:00,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:41:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:00,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:00,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:00,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:41:00,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:00,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:41:00,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:00,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:41:00,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:00,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:41:00,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:00,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:41:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:00,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:01,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:01,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:41:01,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:01,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 09:41:01,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:01,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:41:01,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:01,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:41:01,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:01,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 09:41:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:01,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:01,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:01,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 09:41:01,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:01,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-13 09:41:01,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:01,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:41:01,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:01,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-13 09:41:01,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-13 09:41:01,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924839608] [2020-10-13 09:41:01,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:41:01,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:41:01,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546833808] [2020-10-13 09:41:01,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:41:01,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:41:01,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:41:01,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:41:01,313 INFO L87 Difference]: Start difference. First operand 2332 states and 3138 transitions. Second operand 5 states. [2020-10-13 09:41:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:41:12,564 INFO L93 Difference]: Finished difference Result 4251 states and 5859 transitions. [2020-10-13 09:41:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:41:12,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 277 [2020-10-13 09:41:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:41:12,579 INFO L225 Difference]: With dead ends: 4251 [2020-10-13 09:41:12,579 INFO L226 Difference]: Without dead ends: 2332 [2020-10-13 09:41:12,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:41:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2020-10-13 09:41:12,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2332. [2020-10-13 09:41:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2332 states. [2020-10-13 09:41:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3136 transitions. [2020-10-13 09:41:12,635 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3136 transitions. Word has length 277 [2020-10-13 09:41:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:41:12,635 INFO L479 AbstractCegarLoop]: Abstraction has 2332 states and 3136 transitions. [2020-10-13 09:41:12,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:41:12,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3136 transitions. [2020-10-13 09:41:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-13 09:41:12,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:41:12,641 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:41:12,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 09:41:12,641 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:41:12,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:41:12,641 INFO L82 PathProgramCache]: Analyzing trace with hash 921178771, now seen corresponding path program 1 times [2020-10-13 09:41:12,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:41:12,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25275526] [2020-10-13 09:41:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:41:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:12,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:12,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:13,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:13,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:16,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:17,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:17,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-13 09:41:17,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 09:41:17,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 09:41:17,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:17,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:41:17,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 249 [2020-10-13 09:41:17,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 09:41:17,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:17,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:41:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:17,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:17,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:17,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:41:17,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:17,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:41:17,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:41:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:17,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:41:17,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:17,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:41:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:17,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:17,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:17,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:41:17,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:17,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 09:41:17,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:17,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:41:17,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:17,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:41:17,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:18,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 09:41:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:18,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:18,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:18,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 09:41:18,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:18,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 09:41:18,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:18,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:41:18,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:18,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:41:18,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:18,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-10-13 09:41:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:18,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:18,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:18,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 09:41:18,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:18,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-13 09:41:18,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:18,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:41:18,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:18,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 09:41:18,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 129 proven. 3 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-10-13 09:41:18,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25275526] [2020-10-13 09:41:18,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:41:18,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:41:18,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436532873] [2020-10-13 09:41:18,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:41:18,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:41:18,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:41:18,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:41:18,221 INFO L87 Difference]: Start difference. First operand 2332 states and 3136 transitions. Second operand 5 states. [2020-10-13 09:41:35,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:41:35,080 INFO L93 Difference]: Finished difference Result 4248 states and 5852 transitions. [2020-10-13 09:41:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:41:35,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 284 [2020-10-13 09:41:35,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:41:35,092 INFO L225 Difference]: With dead ends: 4248 [2020-10-13 09:41:35,093 INFO L226 Difference]: Without dead ends: 2332 [2020-10-13 09:41:35,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:41:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2020-10-13 09:41:35,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2332. [2020-10-13 09:41:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2332 states. [2020-10-13 09:41:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3134 transitions. [2020-10-13 09:41:35,148 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3134 transitions. Word has length 284 [2020-10-13 09:41:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:41:35,149 INFO L479 AbstractCegarLoop]: Abstraction has 2332 states and 3134 transitions. [2020-10-13 09:41:35,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:41:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3134 transitions. [2020-10-13 09:41:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-13 09:41:35,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:41:35,155 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:41:35,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 09:41:35,156 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:41:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:41:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash -321503797, now seen corresponding path program 1 times [2020-10-13 09:41:35,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:41:35,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996137217] [2020-10-13 09:41:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:41:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:35,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:35,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:36,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:36,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:37,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:37,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-13 09:41:37,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:41:37,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2062 [2020-10-13 09:41:37,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:37,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:41:37,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 258 [2020-10-13 09:41:37,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 09:41:37,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:37,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:41:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:37,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:37,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:37,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:41:37,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:37,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:41:37,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:37,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:41:37,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:37,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:41:37,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:37,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:41:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:37,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:37,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:37,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:41:37,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:37,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 09:41:37,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:41:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:41:37,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:37,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 09:41:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:37,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:37,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:37,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 09:41:37,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:37,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-13 09:41:37,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:37,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:41:37,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:37,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-13 09:41:37,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-13 09:41:37,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996137217] [2020-10-13 09:41:37,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:41:37,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:41:37,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773263885] [2020-10-13 09:41:37,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:41:37,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:41:37,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:41:37,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:41:37,794 INFO L87 Difference]: Start difference. First operand 2332 states and 3134 transitions. Second operand 5 states. [2020-10-13 09:41:55,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:41:55,197 INFO L93 Difference]: Finished difference Result 4237 states and 5837 transitions. [2020-10-13 09:41:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:41:55,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 295 [2020-10-13 09:41:55,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:41:55,215 INFO L225 Difference]: With dead ends: 4237 [2020-10-13 09:41:55,215 INFO L226 Difference]: Without dead ends: 2332 [2020-10-13 09:41:55,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:41:55,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2020-10-13 09:41:55,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2332. [2020-10-13 09:41:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2332 states. [2020-10-13 09:41:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3132 transitions. [2020-10-13 09:41:55,273 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3132 transitions. Word has length 295 [2020-10-13 09:41:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:41:55,274 INFO L479 AbstractCegarLoop]: Abstraction has 2332 states and 3132 transitions. [2020-10-13 09:41:55,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:41:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3132 transitions. [2020-10-13 09:41:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-13 09:41:55,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:41:55,281 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:41:55,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 09:41:55,281 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:41:55,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:41:55,282 INFO L82 PathProgramCache]: Analyzing trace with hash -139373257, now seen corresponding path program 1 times [2020-10-13 09:41:55,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:41:55,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528261657] [2020-10-13 09:41:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:41:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:55,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:55,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:55,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:56,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:57,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:57,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-13 09:41:57,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:41:57,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2407 [2020-10-13 09:41:57,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:57,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:41:57,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 262 [2020-10-13 09:41:57,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:41:57,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:57,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:41:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:57,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:57,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:57,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:41:57,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:57,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:41:57,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:41:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:41:57,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:57,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:41:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:57,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:57,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:57,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:41:57,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:57,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 09:41:57,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:57,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:41:57,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:57,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:41:57,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:57,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 09:41:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:58,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:58,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:58,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 09:41:58,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:58,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-13 09:41:58,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:58,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:41:58,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-10-13 09:41:58,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:41:58,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-13 09:41:58,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528261657] [2020-10-13 09:41:58,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:41:58,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 09:41:58,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092775429] [2020-10-13 09:41:58,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:41:58,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:41:58,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:41:58,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:41:58,248 INFO L87 Difference]: Start difference. First operand 2332 states and 3132 transitions. Second operand 5 states. [2020-10-13 09:42:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:42:19,522 INFO L93 Difference]: Finished difference Result 6032 states and 8515 transitions. [2020-10-13 09:42:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:42:19,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 301 [2020-10-13 09:42:19,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:42:19,550 INFO L225 Difference]: With dead ends: 6032 [2020-10-13 09:42:19,550 INFO L226 Difference]: Without dead ends: 4139 [2020-10-13 09:42:19,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:42:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2020-10-13 09:42:19,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 4120. [2020-10-13 09:42:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4120 states. [2020-10-13 09:42:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4120 states to 4120 states and 5592 transitions. [2020-10-13 09:42:19,655 INFO L78 Accepts]: Start accepts. Automaton has 4120 states and 5592 transitions. Word has length 301 [2020-10-13 09:42:19,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:42:19,656 INFO L479 AbstractCegarLoop]: Abstraction has 4120 states and 5592 transitions. [2020-10-13 09:42:19,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:42:19,656 INFO L276 IsEmpty]: Start isEmpty. Operand 4120 states and 5592 transitions. [2020-10-13 09:42:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-10-13 09:42:19,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:42:19,663 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:42:19,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 09:42:19,664 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:42:19,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:42:19,664 INFO L82 PathProgramCache]: Analyzing trace with hash -613929698, now seen corresponding path program 1 times [2020-10-13 09:42:19,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:42:19,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058871237] [2020-10-13 09:42:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:42:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:42:19,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:42:20,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:42:20,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-13 09:42:20,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:42:20,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-10-13 09:42:20,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:42:20,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:42:20,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-13 09:42:20,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 181 [2020-10-13 09:42:20,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:42:20,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:42:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:42:20,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:42:20,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:42:20,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:42:20,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:42:20,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 09:42:20,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:42:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:42:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:42:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:42:20,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:42:20,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:42:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:42:20,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:42:20,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:42:20,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:42:20,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:42:20,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-13 09:42:20,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:42:20,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:42:20,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:42:20,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 09:42:20,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:42:20,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 09:42:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:42:20,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:42:21,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:42:21,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 09:42:21,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:42:21,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-13 09:42:21,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:42:21,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:42:21,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 09:42:21,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-13 09:42:21,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:42:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 09:42:21,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058871237] [2020-10-13 09:42:21,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:42:21,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 09:42:21,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491772150] [2020-10-13 09:42:21,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 09:42:21,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:42:21,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 09:42:21,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 09:42:21,346 INFO L87 Difference]: Start difference. First operand 4120 states and 5592 transitions. Second operand 7 states.