/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:23:48,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:23:48,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:23:48,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:23:48,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:23:48,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:23:48,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:23:48,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:23:48,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:23:48,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:23:48,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:23:48,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:23:48,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:23:48,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:23:48,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:23:48,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:23:48,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:23:48,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:23:48,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:23:48,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:23:48,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:23:48,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:23:48,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:23:48,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:23:48,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:23:48,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:23:48,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:23:48,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:23:48,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:23:48,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:23:48,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:23:48,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:23:48,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:23:48,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:23:48,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:23:48,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:23:48,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:23:48,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:23:48,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:23:48,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:23:48,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:23:48,678 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 11:23:48,706 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:23:48,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:23:48,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:23:48,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:23:48,708 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:23:48,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:23:48,709 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:23:48,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:23:48,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:23:48,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:23:48,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:23:48,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:23:48,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:23:48,710 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:23:48,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:23:48,710 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:23:48,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:23:48,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:23:48,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:23:48,711 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:23:48,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:23:48,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:23:48,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:23:48,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:23:48,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:23:48,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:23:48,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:23:48,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:23:48,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:23:48,713 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:23:49,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:23:49,249 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:23:49,254 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:23:49,256 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:23:49,257 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:23:49,258 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-09-25 11:23:49,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0075c3eaf/97f234fb57ba4cb48c7576a395797449/FLAG8bcd0b060 [2020-09-25 11:23:49,909 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:23:49,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-09-25 11:23:49,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0075c3eaf/97f234fb57ba4cb48c7576a395797449/FLAG8bcd0b060 [2020-09-25 11:23:50,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0075c3eaf/97f234fb57ba4cb48c7576a395797449 [2020-09-25 11:23:50,269 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:23:50,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:23:50,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:23:50,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:23:50,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:23:50,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:23:50" (1/1) ... [2020-09-25 11:23:50,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef001ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:50, skipping insertion in model container [2020-09-25 11:23:50,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:23:50" (1/1) ... [2020-09-25 11:23:50,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:23:50,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:23:50,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:23:50,568 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:23:50,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:23:50,614 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:23:50,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:50 WrapperNode [2020-09-25 11:23:50,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:23:50,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:23:50,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:23:50,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:23:50,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:50" (1/1) ... [2020-09-25 11:23:50,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:50" (1/1) ... [2020-09-25 11:23:50,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:50" (1/1) ... [2020-09-25 11:23:50,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:50" (1/1) ... [2020-09-25 11:23:50,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:50" (1/1) ... [2020-09-25 11:23:50,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:50" (1/1) ... [2020-09-25 11:23:50,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:50" (1/1) ... [2020-09-25 11:23:50,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:23:50,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:23:50,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:23:50,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:23:50,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:50" (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 11:23:50,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:23:50,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:23:50,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 11:23:50,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:23:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:23:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 11:23:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 11:23:50,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:23:50,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:23:50,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:23:51,094 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:23:51,094 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:23:51,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:23:51 BoogieIcfgContainer [2020-09-25 11:23:51,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:23:51,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:23:51,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:23:51,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:23:51,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:23:50" (1/3) ... [2020-09-25 11:23:51,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b91fcc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:23:51, skipping insertion in model container [2020-09-25 11:23:51,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:50" (2/3) ... [2020-09-25 11:23:51,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b91fcc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:23:51, skipping insertion in model container [2020-09-25 11:23:51,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:23:51" (3/3) ... [2020-09-25 11:23:51,110 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-09-25 11:23:51,122 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:23:51,134 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:23:51,157 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:23:51,189 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:23:51,189 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:23:51,190 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:23:51,190 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:23:51,190 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:23:51,190 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:23:51,190 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:23:51,191 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:23:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-25 11:23:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 11:23:51,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:51,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:51,219 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:51,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:51,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1882057920, now seen corresponding path program 1 times [2020-09-25 11:23:51,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:51,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778190732] [2020-09-25 11:23:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:51,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:51,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:51,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:51,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 11:23:51,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:23:51,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-09-25 11:23:51,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:51,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:23:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:23:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 11:23:51,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:23:51,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:51,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:51,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:51,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:51,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:51,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:23:51,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:51,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:51,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:51,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:51,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:51,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:51,677 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 11:23:51,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778190732] [2020-09-25 11:23:51,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:23:51,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:23:51,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071351902] [2020-09-25 11:23:51,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:23:51,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:51,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:23:51,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:23:51,715 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-09-25 11:23:51,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:51,816 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-09-25 11:23:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:23:51,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-25 11:23:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:51,833 INFO L225 Difference]: With dead ends: 50 [2020-09-25 11:23:51,833 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 11:23:51,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:23:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 11:23:51,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-25 11:23:51,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-25 11:23:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-25 11:23:51,910 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-09-25 11:23:51,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:51,911 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-25 11:23:51,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:23:51,913 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-25 11:23:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 11:23:51,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:51,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:51,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:23:51,915 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:51,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:51,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1535432394, now seen corresponding path program 1 times [2020-09-25 11:23:51,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:51,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114330289] [2020-09-25 11:23:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:51,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:52,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:52,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 11:23:52,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:52,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-09-25 11:23:52,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:52,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:52,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:23:52,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:23:52,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 11:23:52,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:52,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:52,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:52,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:52,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:52,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:52,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:23:52,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:52,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:52,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:52,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:52,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:52,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:52,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114330289] [2020-09-25 11:23:52,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:52,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:23:52,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286892824] [2020-09-25 11:23:52,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:23:52,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:52,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:23:52,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:23:52,699 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-09-25 11:23:52,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:52,948 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-09-25 11:23:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 11:23:52,949 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-25 11:23:52,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:52,950 INFO L225 Difference]: With dead ends: 48 [2020-09-25 11:23:52,951 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 11:23:52,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:23:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 11:23:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-25 11:23:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 11:23:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-25 11:23:52,959 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-09-25 11:23:52,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:52,960 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-25 11:23:52,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:23:52,960 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-25 11:23:52,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 11:23:52,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:52,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:52,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:23:52,962 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:52,962 INFO L82 PathProgramCache]: Analyzing trace with hash -927596731, now seen corresponding path program 1 times [2020-09-25 11:23:52,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:52,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711845303] [2020-09-25 11:23:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:52,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:53,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:53,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 11:23:53,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:53,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-25 11:23:53,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:53,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:53,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:23:53,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:23:53,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 11:23:53,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:53,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:53,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:53,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:53,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:53,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:53,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:23:53,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:53,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:53,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:53,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:53,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:53,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:53,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711845303] [2020-09-25 11:23:53,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:53,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:23:53,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311675116] [2020-09-25 11:23:53,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:23:53,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:53,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:23:53,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:23:53,120 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-25 11:23:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:53,197 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-09-25 11:23:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:23:53,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-25 11:23:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:53,201 INFO L225 Difference]: With dead ends: 42 [2020-09-25 11:23:53,201 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 11:23:53,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:23:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 11:23:53,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-25 11:23:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 11:23:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-25 11:23:53,211 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-09-25 11:23:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:53,212 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-25 11:23:53,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:23:53,212 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-25 11:23:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 11:23:53,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:53,214 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:53,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:23:53,214 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:53,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:53,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1778100254, now seen corresponding path program 2 times [2020-09-25 11:23:53,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:53,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15371974] [2020-09-25 11:23:53,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:53,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:53,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:53,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 11:23:53,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:53,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-09-25 11:23:53,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:53,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:53,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 11:23:53,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:23:53,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 11:23:53,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:53,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:53,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:53,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:53,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:53,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:53,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:23:53,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:53,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:53,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:53,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:53,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:53,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15371974] [2020-09-25 11:23:53,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:53,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 11:23:53,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465319789] [2020-09-25 11:23:53,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 11:23:53,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:53,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 11:23:53,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:23:53,828 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-25 11:23:54,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:54,218 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-25 11:23:54,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 11:23:54,218 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-25 11:23:54,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:54,220 INFO L225 Difference]: With dead ends: 42 [2020-09-25 11:23:54,220 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 11:23:54,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-25 11:23:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 11:23:54,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-09-25 11:23:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-25 11:23:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-25 11:23:54,227 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2020-09-25 11:23:54,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:54,227 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-25 11:23:54,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 11:23:54,227 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-25 11:23:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 11:23:54,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:54,229 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:54,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:23:54,229 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:54,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1884066515, now seen corresponding path program 2 times [2020-09-25 11:23:54,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:54,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748465200] [2020-09-25 11:23:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:54,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:54,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:54,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 11:23:54,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:54,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-25 11:23:54,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:54,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:23:54,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:23:54,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 11:23:54,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:54,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:54,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:54,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:54,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:54,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:54,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:23:54,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:54,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:54,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:54,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:54,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:54,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:54,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748465200] [2020-09-25 11:23:54,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:54,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 11:23:54,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517550018] [2020-09-25 11:23:54,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:23:54,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:54,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:23:54,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:23:54,392 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-25 11:23:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:54,473 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-09-25 11:23:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 11:23:54,474 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-25 11:23:54,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:54,475 INFO L225 Difference]: With dead ends: 48 [2020-09-25 11:23:54,475 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 11:23:54,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:23:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 11:23:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-25 11:23:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 11:23:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-25 11:23:54,482 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-09-25 11:23:54,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:54,483 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-25 11:23:54,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:23:54,483 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-25 11:23:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 11:23:54,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:54,484 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:54,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:23:54,485 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:54,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1363892486, now seen corresponding path program 3 times [2020-09-25 11:23:54,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:54,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410806137] [2020-09-25 11:23:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:54,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:54,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:54,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 11:23:54,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:54,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-09-25 11:23:54,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:54,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:54,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 11:23:54,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:23:54,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 11:23:54,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:55,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:55,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:55,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:55,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:55,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:55,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:23:55,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:55,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:55,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:55,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:55,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:55,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 11:23:55,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410806137] [2020-09-25 11:23:55,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:55,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 11:23:55,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089302042] [2020-09-25 11:23:55,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 11:23:55,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:55,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 11:23:55,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:23:55,086 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-25 11:23:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:55,489 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-09-25 11:23:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 11:23:55,490 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-25 11:23:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:55,491 INFO L225 Difference]: With dead ends: 47 [2020-09-25 11:23:55,492 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 11:23:55,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-25 11:23:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 11:23:55,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-25 11:23:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-25 11:23:55,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-25 11:23:55,499 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2020-09-25 11:23:55,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:55,500 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-25 11:23:55,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 11:23:55,500 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-25 11:23:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 11:23:55,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:55,501 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:55,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:23:55,502 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:55,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:55,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1557187861, now seen corresponding path program 3 times [2020-09-25 11:23:55,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:55,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752631120] [2020-09-25 11:23:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:55,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:55,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:55,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 11:23:55,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:55,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-09-25 11:23:55,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:55,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:55,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:23:55,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:23:55,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 11:23:55,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:55,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:55,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:55,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:55,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:55,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:55,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:23:55,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:55,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:55,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:55,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:55,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:55,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:55,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752631120] [2020-09-25 11:23:55,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:55,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:23:55,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83357136] [2020-09-25 11:23:55,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:23:55,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:55,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:23:55,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:23:55,743 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-09-25 11:23:55,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:55,853 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-25 11:23:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 11:23:55,854 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-09-25 11:23:55,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:55,855 INFO L225 Difference]: With dead ends: 60 [2020-09-25 11:23:55,855 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 11:23:55,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:23:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 11:23:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-25 11:23:55,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 11:23:55,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-09-25 11:23:55,863 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-09-25 11:23:55,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:55,864 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-09-25 11:23:55,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:23:55,864 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-09-25 11:23:55,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 11:23:55,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:55,865 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:55,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 11:23:55,866 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:55,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:55,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2133811459, now seen corresponding path program 4 times [2020-09-25 11:23:55,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:55,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958631358] [2020-09-25 11:23:55,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:55,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:56,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:56,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 11:23:56,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:56,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-09-25 11:23:56,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:56,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:56,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:23:56,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:23:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 11:23:56,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:56,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:56,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:56,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:56,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:56,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:56,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:23:56,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:56,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:56,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:56,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:56,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:56,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:56,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958631358] [2020-09-25 11:23:56,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:56,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:23:56,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054604126] [2020-09-25 11:23:56,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:23:56,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:56,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:23:56,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:23:56,188 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2020-09-25 11:23:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:56,341 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-25 11:23:56,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 11:23:56,343 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-25 11:23:56,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:56,345 INFO L225 Difference]: With dead ends: 66 [2020-09-25 11:23:56,345 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 11:23:56,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:23:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 11:23:56,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-25 11:23:56,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 11:23:56,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-09-25 11:23:56,359 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-09-25 11:23:56,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:56,360 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-09-25 11:23:56,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:23:56,360 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-09-25 11:23:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 11:23:56,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:56,366 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:56,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 11:23:56,366 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:56,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1351967461, now seen corresponding path program 5 times [2020-09-25 11:23:56,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:56,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455822187] [2020-09-25 11:23:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:56,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:56,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:56,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 11:23:56,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:56,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-09-25 11:23:56,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:56,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:56,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 11:23:56,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:23:56,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 11:23:56,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:56,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:56,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:56,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:56,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:56,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:56,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:23:56,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:56,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:56,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:56,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:56,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:56,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:56,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455822187] [2020-09-25 11:23:56,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:56,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 11:23:56,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310300812] [2020-09-25 11:23:56,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 11:23:56,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:56,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 11:23:56,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:23:56,849 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-09-25 11:23:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:57,072 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-09-25 11:23:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 11:23:57,073 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-25 11:23:57,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:57,075 INFO L225 Difference]: With dead ends: 72 [2020-09-25 11:23:57,075 INFO L226 Difference]: Without dead ends: 61 [2020-09-25 11:23:57,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-25 11:23:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-25 11:23:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-09-25 11:23:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 11:23:57,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-25 11:23:57,085 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-09-25 11:23:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:57,085 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-25 11:23:57,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 11:23:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-25 11:23:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 11:23:57,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:57,087 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:57,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 11:23:57,087 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:57,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:57,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1927178035, now seen corresponding path program 6 times [2020-09-25 11:23:57,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:57,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513957073] [2020-09-25 11:23:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:57,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:57,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:57,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 11:23:57,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:57,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-09-25 11:23:57,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:57,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 11:23:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:23:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 11:23:57,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:57,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:57,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:57,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:57,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:57,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:57,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:23:57,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:57,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:57,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:57,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:57,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:57,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:57,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513957073] [2020-09-25 11:23:57,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:57,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 11:23:57,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41142924] [2020-09-25 11:23:57,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 11:23:57,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:57,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 11:23:57,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:23:57,632 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-09-25 11:23:57,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:57,853 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-25 11:23:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 11:23:57,854 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-09-25 11:23:57,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:57,855 INFO L225 Difference]: With dead ends: 78 [2020-09-25 11:23:57,855 INFO L226 Difference]: Without dead ends: 67 [2020-09-25 11:23:57,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-25 11:23:57,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-25 11:23:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-25 11:23:57,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 11:23:57,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-25 11:23:57,862 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-09-25 11:23:57,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:57,863 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-25 11:23:57,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 11:23:57,863 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-25 11:23:57,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 11:23:57,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:57,864 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:57,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 11:23:57,865 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:57,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:57,865 INFO L82 PathProgramCache]: Analyzing trace with hash -879247179, now seen corresponding path program 7 times [2020-09-25 11:23:57,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:57,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348522489] [2020-09-25 11:23:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:57,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:58,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:58,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 11:23:58,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:58,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-09-25 11:23:58,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:58,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:58,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 11:23:58,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:23:58,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 11:23:58,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:58,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:58,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:58,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:58,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:58,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:58,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:23:58,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:58,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:58,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:58,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348522489] [2020-09-25 11:23:58,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:58,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 11:23:58,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265509237] [2020-09-25 11:23:58,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 11:23:58,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:58,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 11:23:58,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-25 11:23:58,549 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-09-25 11:23:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:58,841 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-09-25 11:23:58,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 11:23:58,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-09-25 11:23:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:58,843 INFO L225 Difference]: With dead ends: 84 [2020-09-25 11:23:58,843 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 11:23:58,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-25 11:23:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 11:23:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-09-25 11:23:58,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 11:23:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-25 11:23:58,856 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-09-25 11:23:58,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:58,859 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-25 11:23:58,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 11:23:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-25 11:23:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 11:23:58,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:58,863 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:58,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 11:23:58,864 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:58,864 INFO L82 PathProgramCache]: Analyzing trace with hash -583378275, now seen corresponding path program 8 times [2020-09-25 11:23:58,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:58,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658972440] [2020-09-25 11:23:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:58,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:59,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:59,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 11:23:59,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:59,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-09-25 11:23:59,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:59,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:59,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 11:23:59,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:23:59,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 11:23:59,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:59,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:59,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:59,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:59,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:59,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:59,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:23:59,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:59,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:59,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:59,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:59,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:59,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:59,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658972440] [2020-09-25 11:23:59,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:59,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 11:23:59,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725574289] [2020-09-25 11:23:59,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 11:23:59,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:59,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 11:23:59,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:23:59,726 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-09-25 11:24:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:00,149 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-09-25 11:24:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 11:24:00,150 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-09-25 11:24:00,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:00,152 INFO L225 Difference]: With dead ends: 89 [2020-09-25 11:24:00,152 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 11:24:00,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 11:24:00,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 11:24:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-25 11:24:00,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 11:24:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-25 11:24:00,167 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-09-25 11:24:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:00,167 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-25 11:24:00,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 11:24:00,167 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-25 11:24:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-25 11:24:00,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:00,169 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:00,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 11:24:00,175 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:00,175 INFO L82 PathProgramCache]: Analyzing trace with hash 929818245, now seen corresponding path program 9 times [2020-09-25 11:24:00,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:00,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309177604] [2020-09-25 11:24:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 11:24:00,197 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 11:24:00,197 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 11:24:00,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 11:24:00,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 11:24:00 BoogieIcfgContainer [2020-09-25 11:24:00,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 11:24:00,228 INFO L168 Benchmark]: Toolchain (without parser) took 9956.13 ms. Allocated memory was 140.5 MB in the beginning and 299.4 MB in the end (delta: 158.9 MB). Free memory was 104.2 MB in the beginning and 216.9 MB in the end (delta: -112.6 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. [2020-09-25 11:24:00,229 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-25 11:24:00,230 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.20 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-25 11:24:00,231 INFO L168 Benchmark]: Boogie Preprocessor took 132.03 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 94.3 MB in the beginning and 182.5 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-25 11:24:00,231 INFO L168 Benchmark]: RCFGBuilder took 351.03 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 169.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-25 11:24:00,232 INFO L168 Benchmark]: TraceAbstraction took 9123.54 ms. Allocated memory was 203.4 MB in the beginning and 299.4 MB in the end (delta: 95.9 MB). Free memory was 168.9 MB in the beginning and 216.9 MB in the end (delta: -48.0 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. [2020-09-25 11:24:00,236 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 336.20 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.03 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 94.3 MB in the beginning and 182.5 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 351.03 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 169.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9123.54 ms. Allocated memory was 203.4 MB in the beginning and 299.4 MB in the end (delta: 95.9 MB). Free memory was 168.9 MB in the beginning and 216.9 MB in the end (delta: -48.0 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.0s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 200 SDtfs, 192 SDslu, 1453 SDs, 0 SdLazy, 865 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 262 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=12, 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, 12 MinimizatonAttempts, 32 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 533 NumberOfCodeBlocks, 533 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 448 ConstructedInterpolants, 0 QuantifiedInterpolants, 60454 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 1 PerfectInterpolantSequences, 160/758 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 incorrect! Received shutdown request...