/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=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:39:32,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:39:32,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:39:32,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:39:32,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:39:32,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:39:32,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:39:32,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:39:32,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:39:32,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:39:32,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:39:32,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:39:32,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:39:32,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:39:32,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:39:32,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:39:32,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:39:32,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:39:32,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:39:32,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:39:32,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:39:32,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:39:32,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:39:32,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:39:32,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:39:32,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:39:32,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:39:32,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:39:32,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:39:32,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:39:32,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:39:32,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:39:32,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:39:32,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:39:32,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:39:32,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:39:32,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:39:32,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:39:32,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:39:32,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:39:32,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:39:32,798 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 13:39:32,842 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:39:32,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:39:32,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:39:32,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:39:32,845 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:39:32,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:39:32,845 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:39:32,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:39:32,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:39:32,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:39:32,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:39:32,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:39:32,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:39:32,848 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:39:32,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:39:32,848 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:39:32,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:39:32,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:39:32,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:39:32,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:39:32,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:39:32,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:39:32,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:39:32,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:39:32,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:39:32,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:39:32,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:39:32,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:39:32,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:39:32,851 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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-09-25 13:39:33,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:39:33,362 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:39:33,367 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:39:33,370 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:39:33,370 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:39:33,371 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-09-25 13:39:33,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/695564422/c8e4fd747be044b0a939b1585445bfdf/FLAG4f7e76cf6 [2020-09-25 13:39:34,004 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:39:34,005 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-09-25 13:39:34,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/695564422/c8e4fd747be044b0a939b1585445bfdf/FLAG4f7e76cf6 [2020-09-25 13:39:34,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/695564422/c8e4fd747be044b0a939b1585445bfdf [2020-09-25 13:39:34,362 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:39:34,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:39:34,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:39:34,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:39:34,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:39:34,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:39:34" (1/1) ... [2020-09-25 13:39:34,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c77fbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:34, skipping insertion in model container [2020-09-25 13:39:34,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:39:34" (1/1) ... [2020-09-25 13:39:34,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:39:34,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:39:34,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:39:34,646 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:39:34,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:39:34,677 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:39:34,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:34 WrapperNode [2020-09-25 13:39:34,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:39:34,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:39:34,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:39:34,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:39:34,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:34" (1/1) ... [2020-09-25 13:39:34,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:34" (1/1) ... [2020-09-25 13:39:34,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:34" (1/1) ... [2020-09-25 13:39:34,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:34" (1/1) ... [2020-09-25 13:39:34,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:34" (1/1) ... [2020-09-25 13:39:34,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:34" (1/1) ... [2020-09-25 13:39:34,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:34" (1/1) ... [2020-09-25 13:39:34,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:39:34,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:39:34,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:39:34,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:39:34,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:39:34,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:39:34,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:39:34,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 13:39:34,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:39:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:39:34,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 13:39:34,875 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:39:34,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:39:34,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:39:35,071 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:39:35,072 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 13:39:35,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:39:35 BoogieIcfgContainer [2020-09-25 13:39:35,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:39:35,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:39:35,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:39:35,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:39:35,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:39:34" (1/3) ... [2020-09-25 13:39:35,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bdfe86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:39:35, skipping insertion in model container [2020-09-25 13:39:35,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:34" (2/3) ... [2020-09-25 13:39:35,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bdfe86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:39:35, skipping insertion in model container [2020-09-25 13:39:35,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:39:35" (3/3) ... [2020-09-25 13:39:35,087 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2020-09-25 13:39:35,100 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:39:35,109 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:39:35,137 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:39:35,174 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:39:35,175 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:39:35,175 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:39:35,175 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:39:35,175 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:39:35,176 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:39:35,176 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:39:35,176 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:39:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-25 13:39:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 13:39:35,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:35,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:35,211 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:35,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:35,220 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-09-25 13:39:35,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:35,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794976933] [2020-09-25 13:39:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:35,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:35,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:35,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:35,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 13:39:35,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:39:35,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-25 13:39:35,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:35,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:39:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 13:39:35,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 13:39:35,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 13:39:35,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:35,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:35,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:35,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:39:35,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:35,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 13:39:35,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:35,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:35,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:35,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:35,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:35,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:35,690 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 13:39:35,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794976933] [2020-09-25 13:39:35,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:39:35,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:39:35,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003378252] [2020-09-25 13:39:35,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:39:35,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:35,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:39:35,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:39:35,717 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-09-25 13:39:35,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:35,803 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-09-25 13:39:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 13:39:35,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-09-25 13:39:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:35,816 INFO L225 Difference]: With dead ends: 36 [2020-09-25 13:39:35,817 INFO L226 Difference]: Without dead ends: 19 [2020-09-25 13:39:35,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:39:35,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-25 13:39:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-09-25 13:39:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-25 13:39:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-25 13:39:35,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-09-25 13:39:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:35,861 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-25 13:39:35,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:39:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-25 13:39:35,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 13:39:35,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:35,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:35,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:39:35,863 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:35,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-09-25 13:39:35,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:35,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028601686] [2020-09-25 13:39:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:35,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:35,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:36,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:36,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:39:36,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:39:36,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-09-25 13:39:36,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:36,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:36,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:39:36,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 13:39:36,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 13:39:36,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 13:39:36,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:36,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:36,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:36,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:39:36,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:36,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 13:39:36,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:36,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:36,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:36,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:36,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:36,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:36,186 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 13:39:36,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028601686] [2020-09-25 13:39:36,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:39:36,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 13:39:36,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131017995] [2020-09-25 13:39:36,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:39:36,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:36,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:39:36,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:39:36,191 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-09-25 13:39:36,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:36,260 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-09-25 13:39:36,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:39:36,260 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 13:39:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:36,262 INFO L225 Difference]: With dead ends: 29 [2020-09-25 13:39:36,262 INFO L226 Difference]: Without dead ends: 24 [2020-09-25 13:39:36,263 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 13:39:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-25 13:39:36,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-09-25 13:39:36,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 13:39:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-25 13:39:36,271 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-25 13:39:36,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:36,272 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-25 13:39:36,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:39:36,272 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-25 13:39:36,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 13:39:36,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:36,274 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:36,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:39:36,274 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:36,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:36,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-09-25 13:39:36,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:36,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600978335] [2020-09-25 13:39:36,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:36,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:36,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:36,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:36,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 13:39:36,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:39:36,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-09-25 13:39:36,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:36,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:36,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:39:36,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 13:39:36,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 13:39:36,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:36,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:36,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:36,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:36,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:39:36,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:36,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:39:36,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:36,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:36,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:39:36,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600978335] [2020-09-25 13:39:36,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:39:36,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 13:39:36,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58560325] [2020-09-25 13:39:36,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 13:39:36,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:36,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 13:39:36,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 13:39:36,671 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-09-25 13:39:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:36,780 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-09-25 13:39:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 13:39:36,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-25 13:39:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:36,782 INFO L225 Difference]: With dead ends: 34 [2020-09-25 13:39:36,782 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 13:39:36,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-25 13:39:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 13:39:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-25 13:39:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 13:39:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-25 13:39:36,790 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-25 13:39:36,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:36,790 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-25 13:39:36,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 13:39:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-25 13:39:36,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 13:39:36,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:36,792 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:36,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:39:36,792 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:36,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-09-25 13:39:36,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:36,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896469064] [2020-09-25 13:39:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:36,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:36,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:37,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:37,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 13:39:37,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:39:37,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-09-25 13:39:37,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:37,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:37,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:39:37,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 13:39:37,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 13:39:37,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:37,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:37,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:37,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:37,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:39:37,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:37,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:39:37,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:37,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:37,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:37,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 13:39:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:39:37,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896469064] [2020-09-25 13:39:37,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:39:37,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:39:37,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729450839] [2020-09-25 13:39:37,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:39:37,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:37,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:39:37,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:39:37,378 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2020-09-25 13:39:37,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:37,564 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-09-25 13:39:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 13:39:37,565 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-09-25 13:39:37,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:37,567 INFO L225 Difference]: With dead ends: 39 [2020-09-25 13:39:37,567 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 13:39:37,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-25 13:39:37,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 13:39:37,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-25 13:39:37,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 13:39:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 13:39:37,585 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-25 13:39:37,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:37,585 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 13:39:37,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:39:37,587 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 13:39:37,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 13:39:37,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:37,589 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:37,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:39:37,590 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:37,590 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-09-25 13:39:37,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:37,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268907236] [2020-09-25 13:39:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:37,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:37,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:38,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:38,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 13:39:38,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:39:38,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-09-25 13:39:38,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:38,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 13:39:38,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 13:39:38,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 13:39:38,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:38,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:38,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:38,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:38,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:39:38,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:38,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:39:38,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:38,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:38,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:38,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:38,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:38,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:39:38,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268907236] [2020-09-25 13:39:38,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:39:38,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 13:39:38,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950137270] [2020-09-25 13:39:38,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 13:39:38,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:38,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 13:39:38,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 13:39:38,333 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2020-09-25 13:39:38,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:38,617 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-09-25 13:39:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 13:39:38,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-09-25 13:39:38,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:38,620 INFO L225 Difference]: With dead ends: 44 [2020-09-25 13:39:38,620 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 13:39:38,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-09-25 13:39:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 13:39:38,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-09-25 13:39:38,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 13:39:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-25 13:39:38,634 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-25 13:39:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:38,636 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-25 13:39:38,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 13:39:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-25 13:39:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 13:39:38,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:38,638 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:38,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 13:39:38,638 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:38,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-09-25 13:39:38,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:38,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334098833] [2020-09-25 13:39:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:38,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:38,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:39,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:39,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 13:39:39,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:39:39,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-09-25 13:39:39,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:39,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:39,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 13:39:39,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 13:39:39,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 13:39:39,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:39,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:39,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:39,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:39,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:39:39,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:39,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 13:39:39,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:39,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:39,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:39:39,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334098833] [2020-09-25 13:39:39,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:39:39,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 13:39:39,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438521584] [2020-09-25 13:39:39,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 13:39:39,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:39,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 13:39:39,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 13:39:39,280 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 13 states. [2020-09-25 13:39:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:39,611 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-09-25 13:39:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 13:39:39,612 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-09-25 13:39:39,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:39,613 INFO L225 Difference]: With dead ends: 49 [2020-09-25 13:39:39,613 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 13:39:39,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-09-25 13:39:39,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 13:39:39,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 13:39:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 13:39:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 13:39:39,625 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-25 13:39:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:39,626 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 13:39:39,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 13:39:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 13:39:39,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 13:39:39,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:39,629 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:39,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 13:39:39,631 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:39,631 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-09-25 13:39:39,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:39,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094786935] [2020-09-25 13:39:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 13:39:39,647 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 13:39:39,647 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 13:39:39,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 13:39:39,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:39:39 BoogieIcfgContainer [2020-09-25 13:39:39,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 13:39:39,679 INFO L168 Benchmark]: Toolchain (without parser) took 5312.93 ms. Allocated memory was 145.2 MB in the beginning and 250.1 MB in the end (delta: 104.9 MB). Free memory was 101.9 MB in the beginning and 181.6 MB in the end (delta: -79.7 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:39,680 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.2 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 13:39:39,685 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.21 ms. Allocated memory is still 145.2 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:39,686 INFO L168 Benchmark]: Boogie Preprocessor took 120.69 ms. Allocated memory was 145.2 MB in the beginning and 200.8 MB in the end (delta: 55.6 MB). Free memory was 92.1 MB in the beginning and 179.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:39,687 INFO L168 Benchmark]: RCFGBuilder took 277.26 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 167.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:39,688 INFO L168 Benchmark]: TraceAbstraction took 4596.32 ms. Allocated memory was 200.8 MB in the beginning and 250.1 MB in the end (delta: 49.3 MB). Free memory was 167.3 MB in the beginning and 181.6 MB in the end (delta: -14.4 MB). Peak memory consumption was 34.9 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:39,700 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.2 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.21 ms. Allocated memory is still 145.2 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.69 ms. Allocated memory was 145.2 MB in the beginning and 200.8 MB in the end (delta: 55.6 MB). Free memory was 92.1 MB in the beginning and 179.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 277.26 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 167.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4596.32 ms. Allocated memory was 200.8 MB in the beginning and 250.1 MB in the end (delta: 49.3 MB). Free memory was 167.3 MB in the beginning and 181.6 MB in the end (delta: -14.4 MB). Peak memory consumption was 34.9 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: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L19] CALL __VERIFIER_assert(x != 6) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.4s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 101 SDtfs, 51 SDslu, 489 SDs, 0 SdLazy, 420 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 182 NumberOfCodeBlocks, 182 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 135 ConstructedInterpolants, 0 QuantifiedInterpolants, 18505 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 0/115 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...