/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:03:20,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:03:20,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:03:20,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:03:20,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:03:20,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:03:20,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:03:20,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:03:20,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:03:20,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:03:20,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:03:20,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:03:20,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:03:20,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:03:20,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:03:20,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:03:20,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:03:20,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:03:20,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:03:20,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:03:20,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:03:20,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:03:20,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:03:20,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:03:20,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:03:20,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:03:20,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:03:20,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:03:20,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:03:20,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 22:03:20,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:03:20,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:03:20,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:03:20,802 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 [2020-08-18 22:03:20,826 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:03:20,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:03:20,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:03:20,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:03:20,828 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:03:20,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:03:20,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:03:20,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:03:20,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:03:20,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:03:20,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:03:20,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:03:20,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:03:20,830 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:03:20,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:03:20,830 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:03:20,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:03:20,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:03:20,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:03:20,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:03:20,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:03:20,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:03:20,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:03:20,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:03:20,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:03:20,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:03:20,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:03:20,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:03:20,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:03:20,833 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 22:03:21,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:03:21,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:03:21,142 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:03:21,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:03:21,144 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:03:21,145 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-18 22:03:21,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6a4fb9ca/8c3b288fb4914a5da8b9978e406828c3/FLAGd8804d533 [2020-08-18 22:03:21,752 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:03:21,753 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-18 22:03:21,764 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6a4fb9ca/8c3b288fb4914a5da8b9978e406828c3/FLAGd8804d533 [2020-08-18 22:03:22,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6a4fb9ca/8c3b288fb4914a5da8b9978e406828c3 [2020-08-18 22:03:22,047 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:03:22,049 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:03:22,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:03:22,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:03:22,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:03:22,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:03:22" (1/1) ... [2020-08-18 22:03:22,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ba5b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:22, skipping insertion in model container [2020-08-18 22:03:22,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:03:22" (1/1) ... [2020-08-18 22:03:22,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:03:22,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:03:22,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:03:22,565 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:03:22,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:03:22,696 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:03:22,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:22 WrapperNode [2020-08-18 22:03:22,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:03:22,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:03:22,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:03:22,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:03:22,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:22" (1/1) ... [2020-08-18 22:03:22,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:22" (1/1) ... [2020-08-18 22:03:22,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:22" (1/1) ... [2020-08-18 22:03:22,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:22" (1/1) ... [2020-08-18 22:03:22,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:22" (1/1) ... [2020-08-18 22:03:22,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:22" (1/1) ... [2020-08-18 22:03:22,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:22" (1/1) ... [2020-08-18 22:03:22,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:03:22,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:03:22,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:03:22,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:03:22,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:22" (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 [2020-08-18 22:03:22,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:03:22,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:03:22,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:03:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:03:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-18 22:03:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-18 22:03:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:03:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:03:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 22:03:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 22:03:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 22:03:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 22:03:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 22:03:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:03:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:03:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 22:03:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 22:03:26,245 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:03:26,245 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 22:03:26,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:03:26 BoogieIcfgContainer [2020-08-18 22:03:26,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:03:26,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:03:26,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:03:26,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:03:26,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:03:22" (1/3) ... [2020-08-18 22:03:26,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49236320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:03:26, skipping insertion in model container [2020-08-18 22:03:26,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:22" (2/3) ... [2020-08-18 22:03:26,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49236320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:03:26, skipping insertion in model container [2020-08-18 22:03:26,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:03:26" (3/3) ... [2020-08-18 22:03:26,258 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2020-08-18 22:03:26,269 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:03:26,277 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:03:26,291 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:03:26,316 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:03:26,316 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:03:26,317 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:03:26,317 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:03:26,317 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:03:26,317 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:03:26,317 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:03:26,318 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:03:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-18 22:03:26,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 22:03:26,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:26,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:26,350 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:26,357 INFO L82 PathProgramCache]: Analyzing trace with hash 377540282, now seen corresponding path program 1 times [2020-08-18 22:03:26,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:26,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087309429] [2020-08-18 22:03:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:27,381 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-08-18 22:03:27,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:27,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087309429] [2020-08-18 22:03:27,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:03:27,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-18 22:03:27,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979156717] [2020-08-18 22:03:27,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 22:03:27,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:27,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 22:03:27,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:03:27,457 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 14 states. [2020-08-18 22:03:27,761 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-18 22:03:48,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:48,842 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2020-08-18 22:03:48,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 22:03:48,844 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-18 22:03:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:48,855 INFO L225 Difference]: With dead ends: 92 [2020-08-18 22:03:48,856 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 22:03:48,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-08-18 22:03:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 22:03:48,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-18 22:03:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 22:03:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-08-18 22:03:48,906 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2020-08-18 22:03:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:48,907 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-08-18 22:03:48,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 22:03:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-08-18 22:03:48,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 22:03:48,909 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:48,909 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:48,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:03:48,910 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:48,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:48,910 INFO L82 PathProgramCache]: Analyzing trace with hash -849330057, now seen corresponding path program 1 times [2020-08-18 22:03:48,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:48,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996001236] [2020-08-18 22:03:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:49,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:49,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996001236] [2020-08-18 22:03:49,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:49,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 22:03:49,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390375423] [2020-08-18 22:03:49,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 22:03:49,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:49,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 22:03:49,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:03:49,467 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 15 states. [2020-08-18 22:03:49,692 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-18 22:04:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:04:12,522 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-08-18 22:04:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 22:04:12,523 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-18 22:04:12,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:04:12,525 INFO L225 Difference]: With dead ends: 65 [2020-08-18 22:04:12,525 INFO L226 Difference]: Without dead ends: 62 [2020-08-18 22:04:12,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-08-18 22:04:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-18 22:04:12,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-08-18 22:04:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-18 22:04:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-08-18 22:04:12,542 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2020-08-18 22:04:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:04:12,543 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-08-18 22:04:12,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 22:04:12,543 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-08-18 22:04:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 22:04:12,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:04:12,545 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:04:12,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:04:12,546 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:04:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:04:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1610392358, now seen corresponding path program 2 times [2020-08-18 22:04:12,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:04:12,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105560797] [2020-08-18 22:04:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:04:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:04:13,174 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-08-18 22:04:13,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:04:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:04:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:04:13,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105560797] [2020-08-18 22:04:13,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:04:13,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 22:04:13,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784941250] [2020-08-18 22:04:13,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 22:04:13,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:04:13,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 22:04:13,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:04:13,201 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2020-08-18 22:04:13,468 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-18 22:04:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:04:38,372 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-08-18 22:04:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 22:04:38,372 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-08-18 22:04:38,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:04:38,374 INFO L225 Difference]: With dead ends: 70 [2020-08-18 22:04:38,374 INFO L226 Difference]: Without dead ends: 67 [2020-08-18 22:04:38,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-08-18 22:04:38,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-18 22:04:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-08-18 22:04:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 22:04:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-08-18 22:04:38,385 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2020-08-18 22:04:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:04:38,385 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-08-18 22:04:38,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 22:04:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-08-18 22:04:38,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 22:04:38,387 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:04:38,388 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:04:38,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:04:38,388 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:04:38,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:04:38,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1809942103, now seen corresponding path program 3 times [2020-08-18 22:04:38,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:04:38,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379905956] [2020-08-18 22:04:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:04:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:04:38,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:04:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:04:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:04:38,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379905956] [2020-08-18 22:04:38,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:04:38,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 22:04:38,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618654866] [2020-08-18 22:04:38,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 22:04:38,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:04:38,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 22:04:38,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:04:38,965 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2020-08-18 22:04:39,226 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 111