/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:53:38,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:53:38,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:53:38,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:53:38,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:53:38,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:53:38,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:53:38,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:53:38,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:53:38,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:53:38,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:53:38,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:53:38,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:53:38,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:53:38,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:53:38,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:53:38,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:53:38,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:53:38,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:53:38,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:53:38,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:53:38,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:53:38,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:53:38,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:53:38,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:53:38,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:53:38,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:53:38,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:53:38,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:53:38,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:53:38,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:53:38,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:53:38,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:53:38,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:53:38,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:53:38,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:53:38,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:53:38,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:53:38,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:53:38,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:53:38,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:53:38,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 06:53:38,709 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:53:38,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:53:38,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:53:38,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:53:38,714 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:53:38,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:53:38,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:53:38,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:53:38,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:53:38,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:53:38,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:53:38,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:53:38,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:53:38,716 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:53:38,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:53:38,717 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:53:38,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:53:38,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:53:38,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:53:38,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:53:38,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:53:38,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:53:38,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:53:38,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:53:38,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:53:38,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:53:38,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:53:38,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:53:38,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:53:38,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:53:39,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:53:39,196 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:53:39,200 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:53:39,202 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:53:39,202 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:53:39,204 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 06:53:39,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4965ea46/70eef4c2385143aa8e70cca49929c4fc/FLAG26a358c14 [2020-09-25 06:53:39,846 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:53:39,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 06:53:39,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4965ea46/70eef4c2385143aa8e70cca49929c4fc/FLAG26a358c14 [2020-09-25 06:53:40,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4965ea46/70eef4c2385143aa8e70cca49929c4fc [2020-09-25 06:53:40,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:53:40,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:53:40,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:53:40,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:53:40,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:53:40,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:53:40" (1/1) ... [2020-09-25 06:53:40,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa107a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:40, skipping insertion in model container [2020-09-25 06:53:40,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:53:40" (1/1) ... [2020-09-25 06:53:40,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:53:40,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:53:40,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:53:40,494 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:53:40,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:53:40,533 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:53:40,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:40 WrapperNode [2020-09-25 06:53:40,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:53:40,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:53:40,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:53:40,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:53:40,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:40" (1/1) ... [2020-09-25 06:53:40,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:40" (1/1) ... [2020-09-25 06:53:40,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:40" (1/1) ... [2020-09-25 06:53:40,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:40" (1/1) ... [2020-09-25 06:53:40,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:40" (1/1) ... [2020-09-25 06:53:40,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:40" (1/1) ... [2020-09-25 06:53:40,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:40" (1/1) ... [2020-09-25 06:53:40,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:53:40,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:53:40,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:53:40,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:53:40,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:53:40,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:53:40,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:53:40,760 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 06:53:40,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 06:53:40,760 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:53:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:53:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 06:53:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 06:53:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 06:53:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 06:53:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:53:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:53:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:53:40,996 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:53:40,997 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 06:53:41,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:53:41 BoogieIcfgContainer [2020-09-25 06:53:41,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:53:41,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:53:41,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:53:41,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:53:41,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:53:40" (1/3) ... [2020-09-25 06:53:41,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361b15a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:53:41, skipping insertion in model container [2020-09-25 06:53:41,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:53:40" (2/3) ... [2020-09-25 06:53:41,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361b15a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:53:41, skipping insertion in model container [2020-09-25 06:53:41,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:53:41" (3/3) ... [2020-09-25 06:53:41,016 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-25 06:53:41,033 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:53:41,044 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:53:41,070 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:53:41,105 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:53:41,105 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:53:41,105 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:53:41,105 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:53:41,106 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:53:41,106 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:53:41,106 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:53:41,107 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:53:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 06:53:41,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 06:53:41,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:41,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:41,163 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:41,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:41,169 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-09-25 06:53:41,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:41,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812805677] [2020-09-25 06:53:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:41,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:41,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:41,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:41,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 06:53:41,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:53:41,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-25 06:53:41,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:41,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:41,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:41,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 06:53:41,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:41,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 06:53:41,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:41,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:41,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:41,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:41,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:41,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 06:53:41,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:41,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:41,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:41,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:41,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:41,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:41,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812805677] [2020-09-25 06:53:41,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:53:41,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 06:53:41,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525053594] [2020-09-25 06:53:41,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 06:53:41,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:41,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 06:53:41,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 06:53:41,470 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-25 06:53:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:41,502 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-25 06:53:41,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 06:53:41,504 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-25 06:53:41,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:41,515 INFO L225 Difference]: With dead ends: 41 [2020-09-25 06:53:41,516 INFO L226 Difference]: Without dead ends: 22 [2020-09-25 06:53:41,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 06:53:41,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-25 06:53:41,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-25 06:53:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 06:53:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-25 06:53:41,571 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-09-25 06:53:41,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:41,571 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-25 06:53:41,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 06:53:41,572 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-25 06:53:41,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 06:53:41,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:41,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:41,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:53:41,574 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:41,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:41,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1179723712, now seen corresponding path program 1 times [2020-09-25 06:53:41,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:41,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023170620] [2020-09-25 06:53:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:41,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:41,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:41,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:41,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:41,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 06:53:41,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:53:41,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-25 06:53:41,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:41,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:41,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:53:41,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 06:53:41,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 06:53:41,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:41,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:41,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:41,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:41,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:41,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:41,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 06:53:41,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:41,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:41,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:41,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:41,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:41,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:41,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023170620] [2020-09-25 06:53:41,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:53:41,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:53:41,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419733206] [2020-09-25 06:53:41,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:53:41,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:41,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:53:41,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:53:41,815 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-09-25 06:53:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:41,911 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-09-25 06:53:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:53:41,912 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-25 06:53:41,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:41,916 INFO L225 Difference]: With dead ends: 50 [2020-09-25 06:53:41,916 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 06:53:41,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:53:41,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 06:53:41,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-09-25 06:53:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-25 06:53:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-25 06:53:41,926 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-09-25 06:53:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:41,927 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-25 06:53:41,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:53:41,927 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-25 06:53:41,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 06:53:41,928 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:41,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:41,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:53:41,929 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:41,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:41,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1535220285, now seen corresponding path program 1 times [2020-09-25 06:53:41,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:41,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513394491] [2020-09-25 06:53:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:41,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:42,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:42,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 06:53:42,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:42,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-25 06:53:42,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:42,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 06:53:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 06:53:42,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 06:53:42,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:42,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:42,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:42,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:42,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:42,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:42,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 06:53:42,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:42,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:42,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:42,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:42,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:42,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:42,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513394491] [2020-09-25 06:53:42,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:53:42,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 06:53:42,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087237733] [2020-09-25 06:53:42,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 06:53:42,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:42,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 06:53:42,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:53:42,166 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-09-25 06:53:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:42,244 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-09-25 06:53:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 06:53:42,245 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-25 06:53:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:42,246 INFO L225 Difference]: With dead ends: 38 [2020-09-25 06:53:42,246 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 06:53:42,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:53:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 06:53:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-25 06:53:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 06:53:42,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-25 06:53:42,254 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2020-09-25 06:53:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:42,254 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-25 06:53:42,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 06:53:42,255 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-25 06:53:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 06:53:42,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:42,256 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:42,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:53:42,257 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:42,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:42,257 INFO L82 PathProgramCache]: Analyzing trace with hash 463086038, now seen corresponding path program 1 times [2020-09-25 06:53:42,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:42,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075422499] [2020-09-25 06:53:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:42,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:42,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:42,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:42,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:42,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 06:53:42,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:53:42,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-09-25 06:53:42,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:42,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:42,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:53:42,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 06:53:42,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 06:53:42,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:53:42,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:42,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:42,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:42,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:42,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:42,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 06:53:42,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:42,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:42,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:42,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:42,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:42,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:42,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075422499] [2020-09-25 06:53:42,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:53:42,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 06:53:42,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337044942] [2020-09-25 06:53:42,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 06:53:42,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:42,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 06:53:42,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 06:53:42,683 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2020-09-25 06:53:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:42,754 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-09-25 06:53:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 06:53:42,754 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-25 06:53:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:42,756 INFO L225 Difference]: With dead ends: 46 [2020-09-25 06:53:42,756 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 06:53:42,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-25 06:53:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 06:53:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-25 06:53:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 06:53:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-25 06:53:42,764 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2020-09-25 06:53:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:42,764 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-25 06:53:42,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 06:53:42,765 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-25 06:53:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 06:53:42,766 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:42,766 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:42,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:53:42,766 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:42,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:42,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1832306077, now seen corresponding path program 2 times [2020-09-25 06:53:42,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:42,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055977083] [2020-09-25 06:53:42,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:42,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:42,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:42,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:42,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:43,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:43,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:43,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:43,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:43,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:43,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 06:53:43,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:53:43,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1067 [2020-09-25 06:53:43,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:43,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:43,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:53:43,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 06:53:43,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 06:53:43,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:43,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:43,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:43,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:43,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:43,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:43,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 06:53:43,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:43,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:43,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:43,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:43,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:43,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:53:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 06:53:43,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055977083] [2020-09-25 06:53:43,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:53:43,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 06:53:43,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915801541] [2020-09-25 06:53:43,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 06:53:43,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:43,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 06:53:43,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 06:53:43,884 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 3 states. [2020-09-25 06:53:43,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:43,911 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-25 06:53:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 06:53:43,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-25 06:53:43,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:43,915 INFO L225 Difference]: With dead ends: 54 [2020-09-25 06:53:43,916 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 06:53:43,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 06:53:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 06:53:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-25 06:53:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 06:53:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-09-25 06:53:43,929 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-09-25 06:53:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:43,930 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-09-25 06:53:43,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 06:53:43,930 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-09-25 06:53:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 06:53:43,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:43,932 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:43,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 06:53:43,932 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:43,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1847206016, now seen corresponding path program 3 times [2020-09-25 06:53:43,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:43,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048759873] [2020-09-25 06:53:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:43,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:44,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:44,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:44,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:44,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:44,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:44,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 06:53:44,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 06:53:44,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-09-25 06:53:44,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:44,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:44,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:53:44,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 06:53:44,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 06:53:44,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:53:44,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:44,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:44,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:44,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:44,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:44,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 06:53:44,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:44,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:44,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:44,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:44,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:44,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:44,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048759873] [2020-09-25 06:53:44,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:53:44,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 06:53:44,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918343553] [2020-09-25 06:53:44,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:53:44,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:44,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:53:44,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:53:44,648 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 8 states. [2020-09-25 06:53:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:44,784 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-09-25 06:53:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 06:53:44,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-25 06:53:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:44,786 INFO L225 Difference]: With dead ends: 57 [2020-09-25 06:53:44,786 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 06:53:44,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:53:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 06:53:44,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-25 06:53:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 06:53:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-09-25 06:53:44,797 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 33 [2020-09-25 06:53:44,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:44,798 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-09-25 06:53:44,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:53:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-09-25 06:53:44,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 06:53:44,803 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:44,803 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:44,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 06:53:44,804 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:44,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:44,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1854078698, now seen corresponding path program 4 times [2020-09-25 06:53:44,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:44,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286495664] [2020-09-25 06:53:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:44,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:44,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:44,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:45,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:45,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:45,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:45,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:45,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:45,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 06:53:45,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 06:53:45,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 771 [2020-09-25 06:53:45,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:45,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:53:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 06:53:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 06:53:45,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:45,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:45,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:45,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:45,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:45,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:45,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 06:53:45,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:45,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:45,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:45,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:45,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:45,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:45,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286495664] [2020-09-25 06:53:45,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:53:45,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 06:53:45,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933584824] [2020-09-25 06:53:45,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 06:53:45,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:45,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 06:53:45,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-25 06:53:45,667 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 7 states. [2020-09-25 06:53:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:45,787 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-09-25 06:53:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 06:53:45,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-25 06:53:45,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:45,790 INFO L225 Difference]: With dead ends: 70 [2020-09-25 06:53:45,791 INFO L226 Difference]: Without dead ends: 62 [2020-09-25 06:53:45,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-09-25 06:53:45,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-25 06:53:45,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-09-25 06:53:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 06:53:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-09-25 06:53:45,806 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 42 [2020-09-25 06:53:45,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:45,808 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-09-25 06:53:45,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 06:53:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-09-25 06:53:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 06:53:45,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:45,810 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:45,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 06:53:45,810 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:45,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:45,812 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 1 times [2020-09-25 06:53:45,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:45,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112563265] [2020-09-25 06:53:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:45,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:46,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:46,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 06:53:46,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:46,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-09-25 06:53:46,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:46,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:46,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 06:53:46,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 06:53:46,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 06:53:46,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 06:53:46,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:46,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:46,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:46,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:46,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:46,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 06:53:46,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:46,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:46,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:46,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:46,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:46,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:46,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112563265] [2020-09-25 06:53:46,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:53:46,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 06:53:46,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68065195] [2020-09-25 06:53:46,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 06:53:46,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:46,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 06:53:46,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 06:53:46,168 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 11 states. [2020-09-25 06:53:46,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:46,357 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-09-25 06:53:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 06:53:46,358 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-25 06:53:46,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:46,359 INFO L225 Difference]: With dead ends: 65 [2020-09-25 06:53:46,359 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 06:53:46,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-25 06:53:46,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 06:53:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-09-25 06:53:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-25 06:53:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-09-25 06:53:46,367 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 44 [2020-09-25 06:53:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:46,367 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-09-25 06:53:46,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 06:53:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-09-25 06:53:46,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 06:53:46,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:46,369 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:46,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 06:53:46,370 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:46,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 5 times [2020-09-25 06:53:46,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:46,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92311535] [2020-09-25 06:53:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:46,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:46,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:46,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:47,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:47,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:47,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:47,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:47,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:47,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:47,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:47,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 06:53:47,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 06:53:47,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1615 [2020-09-25 06:53:47,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:47,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:47,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 06:53:47,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 06:53:47,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 06:53:48,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:48,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:48,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:48,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:48,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:48,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:48,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 06:53:48,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:48,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:48,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:48,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:48,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:48,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:48,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92311535] [2020-09-25 06:53:48,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:53:48,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 06:53:48,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050840911] [2020-09-25 06:53:48,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:53:48,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:48,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:53:48,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:53:48,086 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 8 states. [2020-09-25 06:53:48,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:48,251 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-09-25 06:53:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 06:53:48,252 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-09-25 06:53:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:48,253 INFO L225 Difference]: With dead ends: 79 [2020-09-25 06:53:48,253 INFO L226 Difference]: Without dead ends: 71 [2020-09-25 06:53:48,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-25 06:53:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-25 06:53:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-09-25 06:53:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-25 06:53:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-09-25 06:53:48,260 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 51 [2020-09-25 06:53:48,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:48,261 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-09-25 06:53:48,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:53:48,261 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-09-25 06:53:48,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 06:53:48,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:48,262 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:48,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 06:53:48,263 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:48,264 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 2 times [2020-09-25 06:53:48,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:48,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769173003] [2020-09-25 06:53:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:48,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:48,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:48,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 06:53:48,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:48,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-09-25 06:53:48,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:48,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:48,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 06:53:48,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 06:53:48,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 06:53:48,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:48,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:48,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:48,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:48,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:48,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:48,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 06:53:48,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:48,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:48,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:48,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:48,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:48,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:48,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769173003] [2020-09-25 06:53:48,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:53:48,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 06:53:48,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450526504] [2020-09-25 06:53:48,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 06:53:48,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:48,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 06:53:48,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:53:48,777 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 12 states. [2020-09-25 06:53:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:48,978 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-09-25 06:53:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 06:53:48,978 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-25 06:53:48,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:48,980 INFO L225 Difference]: With dead ends: 74 [2020-09-25 06:53:48,980 INFO L226 Difference]: Without dead ends: 67 [2020-09-25 06:53:48,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-25 06:53:48,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-25 06:53:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-25 06:53:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 06:53:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-09-25 06:53:48,987 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 53 [2020-09-25 06:53:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:48,987 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-09-25 06:53:48,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 06:53:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-09-25 06:53:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 06:53:48,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:48,989 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:48,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 06:53:48,989 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:48,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:48,990 INFO L82 PathProgramCache]: Analyzing trace with hash -392261546, now seen corresponding path program 6 times [2020-09-25 06:53:48,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:48,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188879651] [2020-09-25 06:53:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:49,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:49,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:50,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:50,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:50,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:50,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:50,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:50,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:50,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:50,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:51,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:51,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 06:53:51,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 06:53:51,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2090 [2020-09-25 06:53:51,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:51,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:51,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:53:51,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 06:53:51,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-25 06:53:51,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:51,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:51,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:51,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:51,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:51,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:51,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 06:53:51,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:51,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:51,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:51,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:51,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:51,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:51,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188879651] [2020-09-25 06:53:51,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:53:51,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 06:53:51,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328165025] [2020-09-25 06:53:51,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 06:53:51,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:51,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 06:53:51,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-25 06:53:51,193 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 9 states. [2020-09-25 06:53:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:51,353 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-09-25 06:53:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 06:53:51,354 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-09-25 06:53:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:51,355 INFO L225 Difference]: With dead ends: 88 [2020-09-25 06:53:51,355 INFO L226 Difference]: Without dead ends: 80 [2020-09-25 06:53:51,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-09-25 06:53:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-25 06:53:51,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-09-25 06:53:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 06:53:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-09-25 06:53:51,362 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 60 [2020-09-25 06:53:51,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:51,362 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-09-25 06:53:51,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 06:53:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-09-25 06:53:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 06:53:51,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:51,363 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:51,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 06:53:51,364 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:51,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:51,364 INFO L82 PathProgramCache]: Analyzing trace with hash -384565031, now seen corresponding path program 3 times [2020-09-25 06:53:51,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:51,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452855562] [2020-09-25 06:53:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:51,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:51,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:51,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 06:53:51,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:51,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-09-25 06:53:51,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:51,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 06:53:51,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 06:53:51,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-09-25 06:53:51,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:51,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:51,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:51,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:51,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:51,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:51,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 06:53:51,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:51,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:51,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:51,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:51,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:51,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:51,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452855562] [2020-09-25 06:53:51,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:53:51,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 06:53:51,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906733530] [2020-09-25 06:53:51,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 06:53:51,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:51,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 06:53:51,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-25 06:53:51,917 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 15 states. [2020-09-25 06:53:52,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:52,184 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-09-25 06:53:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 06:53:52,185 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-09-25 06:53:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:52,186 INFO L225 Difference]: With dead ends: 83 [2020-09-25 06:53:52,186 INFO L226 Difference]: Without dead ends: 76 [2020-09-25 06:53:52,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-09-25 06:53:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-25 06:53:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-09-25 06:53:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-25 06:53:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-09-25 06:53:52,203 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 62 [2020-09-25 06:53:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:52,203 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-09-25 06:53:52,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 06:53:52,203 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-09-25 06:53:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 06:53:52,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:52,204 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:52,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 06:53:52,205 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:52,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:52,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1192623616, now seen corresponding path program 7 times [2020-09-25 06:53:52,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:52,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138865445] [2020-09-25 06:53:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:52,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:52,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:52,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:52,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:53,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:53,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:53,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:54,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:54,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:54,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:54,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:55,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:55,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:55,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:55,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 06:53:55,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 06:53:55,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3206 [2020-09-25 06:53:55,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:55,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:55,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 06:53:55,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 06:53:55,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 06:53:55,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:55,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:55,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:55,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:55,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:55,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:55,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 06:53:55,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:55,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:55,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:55,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:55,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:55,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:55,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138865445] [2020-09-25 06:53:55,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:53:55,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 06:53:55,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124645256] [2020-09-25 06:53:55,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 06:53:55,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:55,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 06:53:55,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-25 06:53:55,544 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 10 states. [2020-09-25 06:53:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:55,746 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-09-25 06:53:55,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 06:53:55,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-25 06:53:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:55,748 INFO L225 Difference]: With dead ends: 97 [2020-09-25 06:53:55,748 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 06:53:55,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-09-25 06:53:55,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 06:53:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-25 06:53:55,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 06:53:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-09-25 06:53:55,763 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 69 [2020-09-25 06:53:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:55,764 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-09-25 06:53:55,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 06:53:55,764 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-09-25 06:53:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 06:53:55,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:55,765 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:55,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 06:53:55,767 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:55,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:55,767 INFO L82 PathProgramCache]: Analyzing trace with hash -733368317, now seen corresponding path program 4 times [2020-09-25 06:53:55,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:55,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33487325] [2020-09-25 06:53:55,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:55,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:56,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:56,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 06:53:56,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:56,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-09-25 06:53:56,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:56,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:56,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 06:53:56,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 06:53:56,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-25 06:53:56,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:53:56,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:53:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:56,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:56,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:53:56,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:53:56,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:53:56,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 06:53:56,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:53:56,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:53:56,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:53:56,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:53:56,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:53:56,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:53:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:53:56,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33487325] [2020-09-25 06:53:56,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:53:56,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 06:53:56,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814407640] [2020-09-25 06:53:56,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 06:53:56,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:53:56,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 06:53:56,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-25 06:53:56,356 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 17 states. [2020-09-25 06:53:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:53:56,662 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2020-09-25 06:53:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 06:53:56,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-09-25 06:53:56,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:53:56,664 INFO L225 Difference]: With dead ends: 92 [2020-09-25 06:53:56,664 INFO L226 Difference]: Without dead ends: 85 [2020-09-25 06:53:56,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-09-25 06:53:56,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-25 06:53:56,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-09-25 06:53:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-25 06:53:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-09-25 06:53:56,670 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 71 [2020-09-25 06:53:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:53:56,670 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-09-25 06:53:56,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 06:53:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-09-25 06:53:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-25 06:53:56,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:53:56,672 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:53:56,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 06:53:56,672 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:53:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:53:56,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1330458730, now seen corresponding path program 8 times [2020-09-25 06:53:56,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:53:56,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845662856] [2020-09-25 06:53:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:53:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:53:56,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:56,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:57,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:57,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:57,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:58,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:58,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:58,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:59,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:59,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:53:59,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:00,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:00,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:00,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:00,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:00,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:54:00,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-25 06:54:00,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-25 06:54:00,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4041 [2020-09-25 06:54:00,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:54:00,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:54:00,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 06:54:00,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 06:54:00,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-25 06:54:00,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:54:00,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:54:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:54:00,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:00,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:54:00,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:54:00,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:54:00,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 06:54:00,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:54:00,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:54:00,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:54:00,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:54:00,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:54:00,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:54:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:54:00,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845662856] [2020-09-25 06:54:00,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:54:00,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 06:54:00,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331392844] [2020-09-25 06:54:00,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 06:54:00,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:54:00,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 06:54:00,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-25 06:54:00,872 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 11 states. [2020-09-25 06:54:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:54:01,082 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-09-25 06:54:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 06:54:01,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-09-25 06:54:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:54:01,084 INFO L225 Difference]: With dead ends: 106 [2020-09-25 06:54:01,085 INFO L226 Difference]: Without dead ends: 98 [2020-09-25 06:54:01,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-09-25 06:54:01,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-25 06:54:01,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2020-09-25 06:54:01,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-25 06:54:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-09-25 06:54:01,097 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 78 [2020-09-25 06:54:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:54:01,098 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-09-25 06:54:01,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 06:54:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-09-25 06:54:01,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-25 06:54:01,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:54:01,099 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:54:01,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 06:54:01,100 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:54:01,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:54:01,101 INFO L82 PathProgramCache]: Analyzing trace with hash -48926695, now seen corresponding path program 5 times [2020-09-25 06:54:01,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:54:01,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020069847] [2020-09-25 06:54:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:54:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:54:01,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:01,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:54:01,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-25 06:54:01,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:54:01,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-09-25 06:54:01,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:54:01,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:54:01,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 06:54:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 06:54:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-25 06:54:01,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:54:01,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:54:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:54:01,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:54:01,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:54:01,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:54:01,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:54:01,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 06:54:01,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:54:01,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:54:01,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:54:01,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:54:01,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:54:01,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:54:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 27 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:54:01,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020069847] [2020-09-25 06:54:01,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:54:01,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 06:54:01,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229026969] [2020-09-25 06:54:01,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 06:54:01,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:54:01,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 06:54:01,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-25 06:54:01,947 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 18 states. [2020-09-25 06:54:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:54:02,166 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-09-25 06:54:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 06:54:02,166 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-09-25 06:54:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:54:02,167 INFO L225 Difference]: With dead ends: 88 [2020-09-25 06:54:02,167 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 06:54:02,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2020-09-25 06:54:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 06:54:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 06:54:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 06:54:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 06:54:02,169 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-09-25 06:54:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:54:02,170 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 06:54:02,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 06:54:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 06:54:02,170 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 06:54:02,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 06:54:02,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 06:54:02,343 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 06:54:02,344 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 06:54:02,344 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 06:54:02,344 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 06:54:02,344 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 06:54:02,344 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 06:54:02,344 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 06:54:02,344 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 06:54:02,345 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 06:54:02,345 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 06:54:02,345 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 06:54:02,345 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 22) no Hoare annotation was computed. [2020-09-25 06:54:02,345 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-25 06:54:02,345 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 06:54:02,345 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 22) no Hoare annotation was computed. [2020-09-25 06:54:02,345 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2020-09-25 06:54:02,346 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 06:54:02,346 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-25 06:54:02,346 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-25 06:54:02,346 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-25 06:54:02,346 INFO L268 CegarLoopResult]: For program point L16-3(line 16) no Hoare annotation was computed. [2020-09-25 06:54:02,346 INFO L268 CegarLoopResult]: For program point L16-5(lines 16 19) no Hoare annotation was computed. [2020-09-25 06:54:02,346 INFO L268 CegarLoopResult]: For program point L16-6(line 16) no Hoare annotation was computed. [2020-09-25 06:54:02,347 INFO L268 CegarLoopResult]: For program point L16-7(line 16) no Hoare annotation was computed. [2020-09-25 06:54:02,347 INFO L268 CegarLoopResult]: For program point L16-9(line 16) no Hoare annotation was computed. [2020-09-25 06:54:02,347 INFO L268 CegarLoopResult]: For program point L16-10(line 16) no Hoare annotation was computed. [2020-09-25 06:54:02,347 INFO L264 CegarLoopResult]: At program point L16-11(lines 16 19) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 2))) (or (and (< 0 (+ main_~y~0 1)) (<= (* 3 main_~y~0) .cse0) (<= 1 (+ main_~x~0 main_~y~0))) (and (<= (* 2 main_~y~0) .cse0) (<= 2 main_~y~0)))) [2020-09-25 06:54:02,347 INFO L264 CegarLoopResult]: At program point L16-12(lines 16 19) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2020-09-25 06:54:02,347 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 06:54:02,348 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 06:54:02,348 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 06:54:02,348 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 06:54:02,348 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 06:54:02,348 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 06:54:02,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 06:54:02 BoogieIcfgContainer [2020-09-25 06:54:02,371 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 06:54:02,374 INFO L168 Benchmark]: Toolchain (without parser) took 22168.37 ms. Allocated memory was 146.8 MB in the beginning and 370.1 MB in the end (delta: 223.3 MB). Free memory was 102.7 MB in the beginning and 263.7 MB in the end (delta: -161.0 MB). Peak memory consumption was 62.4 MB. Max. memory is 7.1 GB. [2020-09-25 06:54:02,375 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-25 06:54:02,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.67 ms. Allocated memory is still 146.8 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 06:54:02,377 INFO L168 Benchmark]: Boogie Preprocessor took 128.18 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 92.8 MB in the beginning and 182.5 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-09-25 06:54:02,378 INFO L168 Benchmark]: RCFGBuilder took 342.44 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 169.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-25 06:54:02,379 INFO L168 Benchmark]: TraceAbstraction took 21363.93 ms. Allocated memory was 203.4 MB in the beginning and 370.1 MB in the end (delta: 166.7 MB). Free memory was 169.0 MB in the beginning and 263.7 MB in the end (delta: -94.7 MB). Peak memory consumption was 72.0 MB. Max. memory is 7.1 GB. [2020-09-25 06:54:02,382 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 323.67 ms. Allocated memory is still 146.8 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.18 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 92.8 MB in the beginning and 182.5 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 342.44 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 169.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21363.93 ms. Allocated memory was 203.4 MB in the beginning and 370.1 MB in the end (delta: 166.7 MB). Free memory was 169.0 MB in the beginning and 263.7 MB in the end (delta: -94.7 MB). Peak memory consumption was 72.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((0 < y + 1 && 3 * y <= x + 2) && 1 <= x + y) || (2 * y <= x + 2 && 2 <= y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21.0s, OverallIterations: 16, TraceHistogramMax: 8, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 436 SDtfs, 730 SDslu, 2320 SDs, 0 SdLazy, 932 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 82 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 22 PreInvPairs, 37 NumberOfFragments, 38 HoareAnnotationTreeSize, 22 FomulaSimplifications, 165 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 144 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 17.6s InterpolantComputationTime, 741 NumberOfCodeBlocks, 741 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 725 ConstructedInterpolants, 0 QuantifiedInterpolants, 158931 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 40/1221 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...