/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:19:22,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:19:22,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:19:22,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:19:22,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:19:22,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:19:22,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:19:22,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:19:22,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:19:22,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:19:22,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:19:22,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:19:22,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:19:22,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:19:22,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:19:22,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:19:22,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:19:22,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:19:22,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:19:22,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:19:22,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:19:22,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:19:22,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:19:22,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:19:22,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:19:22,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:19:22,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:19:22,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:19:22,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:19:22,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-21 10:19:22,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:19:22,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:19:22,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:19:22,858 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 [2020-09-21 10:19:22,906 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:19:22,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:19:22,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:19:22,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:19:22,909 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:19:22,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:19:22,910 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:19:22,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:19:22,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:19:22,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:19:22,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:19:22,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:19:22,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:19:22,912 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:19:22,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:19:22,913 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:19:22,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:19:22,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:19:22,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:19:22,914 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:19:22,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:19:22,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:19:22,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:19:22,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:19:22,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:19:22,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:19:22,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:19:22,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:19:22,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:19:22,916 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 -> false [2020-09-21 10:19:23,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:19:23,407 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:19:23,411 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:19:23,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:19:23,413 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:19:23,414 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-09-21 10:19:23,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12a67b452/bc0163e6cabe46dfab13cac3108a280a/FLAGa32c52779 [2020-09-21 10:19:23,977 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:19:23,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-09-21 10:19:23,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12a67b452/bc0163e6cabe46dfab13cac3108a280a/FLAGa32c52779 [2020-09-21 10:19:24,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12a67b452/bc0163e6cabe46dfab13cac3108a280a [2020-09-21 10:19:24,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:19:24,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:19:24,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:19:24,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:19:24,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:19:24,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:19:24" (1/1) ... [2020-09-21 10:19:24,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@144c4f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:24, skipping insertion in model container [2020-09-21 10:19:24,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:19:24" (1/1) ... [2020-09-21 10:19:24,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:19:24,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:19:24,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:19:24,638 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:19:24,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:19:24,671 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:19:24,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:24 WrapperNode [2020-09-21 10:19:24,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:19:24,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:19:24,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:19:24,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:19:24,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:24" (1/1) ... [2020-09-21 10:19:24,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:24" (1/1) ... [2020-09-21 10:19:24,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:24" (1/1) ... [2020-09-21 10:19:24,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:24" (1/1) ... [2020-09-21 10:19:24,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:24" (1/1) ... [2020-09-21 10:19:24,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:24" (1/1) ... [2020-09-21 10:19:24,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:24" (1/1) ... [2020-09-21 10:19:24,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:19:24,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:19:24,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:19:24,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:19:24,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:24" (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 [2020-09-21 10:19:24,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:19:24,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:19:24,864 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-21 10:19:24,864 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-09-21 10:19:24,864 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:19:24,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 10:19:24,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:19:24,865 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-21 10:19:24,865 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-09-21 10:19:24,865 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:19:24,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:19:24,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:19:25,104 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:19:25,105 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:19:25,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:19:25 BoogieIcfgContainer [2020-09-21 10:19:25,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:19:25,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:19:25,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:19:25,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:19:25,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:19:24" (1/3) ... [2020-09-21 10:19:25,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1118290e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:19:25, skipping insertion in model container [2020-09-21 10:19:25,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:24" (2/3) ... [2020-09-21 10:19:25,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1118290e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:19:25, skipping insertion in model container [2020-09-21 10:19:25,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:19:25" (3/3) ... [2020-09-21 10:19:25,140 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-09-21 10:19:25,154 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:19:25,164 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:19:25,208 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:19:25,239 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:19:25,239 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:19:25,239 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:19:25,239 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:19:25,240 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:19:25,240 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:19:25,240 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:19:25,240 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:19:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-09-21 10:19:25,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:19:25,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:25,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:25,273 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:25,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:25,279 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-09-21 10:19:25,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:25,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879504453] [2020-09-21 10:19:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:25,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:25,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:19:25,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879504453] [2020-09-21 10:19:25,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:19:25,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:19:25,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899021226] [2020-09-21 10:19:25,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:19:25,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:25,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:19:25,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:19:25,633 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-09-21 10:19:25,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:25,712 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-09-21 10:19:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:19:25,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 10:19:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:25,729 INFO L225 Difference]: With dead ends: 40 [2020-09-21 10:19:25,729 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 10:19:25,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:19:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 10:19:25,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-21 10:19:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 10:19:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-09-21 10:19:25,788 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-09-21 10:19:25,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:25,788 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-09-21 10:19:25,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:19:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-09-21 10:19:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:19:25,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:25,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:25,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:19:25,792 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:25,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:25,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-09-21 10:19:25,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:25,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309923332] [2020-09-21 10:19:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:25,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:25,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:25,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:19:25,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309923332] [2020-09-21 10:19:25,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:19:25,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:19:25,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490606732] [2020-09-21 10:19:25,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:19:25,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:25,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:19:25,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:19:25,953 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-09-21 10:19:25,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:25,996 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-09-21 10:19:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:19:25,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-21 10:19:25,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:25,999 INFO L225 Difference]: With dead ends: 32 [2020-09-21 10:19:25,999 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 10:19:26,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:19:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 10:19:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-09-21 10:19:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 10:19:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-09-21 10:19:26,008 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-09-21 10:19:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:26,009 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-09-21 10:19:26,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:19:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-09-21 10:19:26,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:19:26,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:26,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:26,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:19:26,011 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:26,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-09-21 10:19:26,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:26,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997799047] [2020-09-21 10:19:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:19:26,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997799047] [2020-09-21 10:19:26,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:19:26,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:19:26,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250071429] [2020-09-21 10:19:26,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:19:26,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:26,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:19:26,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:19:26,216 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-09-21 10:19:26,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:26,287 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-09-21 10:19:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:19:26,288 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-09-21 10:19:26,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:26,290 INFO L225 Difference]: With dead ends: 48 [2020-09-21 10:19:26,290 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 10:19:26,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:19:26,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 10:19:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-21 10:19:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 10:19:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-09-21 10:19:26,299 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-09-21 10:19:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:26,300 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-09-21 10:19:26,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:19:26,300 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-09-21 10:19:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:19:26,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:26,302 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] [2020-09-21 10:19:26,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:19:26,303 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:26,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:26,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-09-21 10:19:26,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:26,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468554341] [2020-09-21 10:19:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:19:26,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468554341] [2020-09-21 10:19:26,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:19:26,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:19:26,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742085674] [2020-09-21 10:19:26,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:19:26,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:26,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:19:26,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:19:26,450 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-09-21 10:19:26,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:26,476 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-09-21 10:19:26,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:19:26,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-21 10:19:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:26,478 INFO L225 Difference]: With dead ends: 50 [2020-09-21 10:19:26,478 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 10:19:26,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:19:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 10:19:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-09-21 10:19:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 10:19:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-09-21 10:19:26,488 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-09-21 10:19:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:26,489 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-09-21 10:19:26,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:19:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-09-21 10:19:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:19:26,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:26,491 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] [2020-09-21 10:19:26,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:19:26,491 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:26,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:26,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-09-21 10:19:26,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:26,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085372895] [2020-09-21 10:19:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:19:26,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085372895] [2020-09-21 10:19:26,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:26,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:19:26,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227266188] [2020-09-21 10:19:26,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:19:26,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:26,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:19:26,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:19:26,859 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-09-21 10:19:27,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:27,009 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-09-21 10:19:27,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:19:27,010 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-09-21 10:19:27,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:27,011 INFO L225 Difference]: With dead ends: 64 [2020-09-21 10:19:27,012 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 10:19:27,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:19:27,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 10:19:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-09-21 10:19:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 10:19:27,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-09-21 10:19:27,031 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-09-21 10:19:27,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:27,032 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-09-21 10:19:27,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:19:27,032 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-09-21 10:19:27,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 10:19:27,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:27,035 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:27,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:19:27,038 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:27,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:27,039 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-09-21 10:19:27,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:27,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895781016] [2020-09-21 10:19:27,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:27,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:27,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:27,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:27,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:27,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 10:19:27,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895781016] [2020-09-21 10:19:27,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:27,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:19:27,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175344718] [2020-09-21 10:19:27,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:19:27,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:27,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:19:27,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:19:27,391 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-09-21 10:19:27,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:27,564 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-09-21 10:19:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:19:27,565 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-09-21 10:19:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:27,566 INFO L225 Difference]: With dead ends: 74 [2020-09-21 10:19:27,567 INFO L226 Difference]: Without dead ends: 54 [2020-09-21 10:19:27,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:19:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-21 10:19:27,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-09-21 10:19:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 10:19:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-09-21 10:19:27,577 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-09-21 10:19:27,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:27,577 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-09-21 10:19:27,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:19:27,577 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-09-21 10:19:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 10:19:27,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:27,579 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:27,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:19:27,580 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:27,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:27,580 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-09-21 10:19:27,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:27,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814149138] [2020-09-21 10:19:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:27,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:27,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:27,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:27,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:27,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:27,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-21 10:19:27,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814149138] [2020-09-21 10:19:27,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:27,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:19:27,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736142980] [2020-09-21 10:19:27,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:19:27,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:27,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:19:27,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:19:27,932 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 14 states. [2020-09-21 10:19:28,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:28,093 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-09-21 10:19:28,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:19:28,094 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-09-21 10:19:28,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:28,095 INFO L225 Difference]: With dead ends: 78 [2020-09-21 10:19:28,095 INFO L226 Difference]: Without dead ends: 60 [2020-09-21 10:19:28,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:19:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-21 10:19:28,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-09-21 10:19:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-21 10:19:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-09-21 10:19:28,104 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 41 [2020-09-21 10:19:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:28,105 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-09-21 10:19:28,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:19:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-09-21 10:19:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 10:19:28,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:28,107 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:28,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:19:28,107 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:28,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-09-21 10:19:28,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:28,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696450933] [2020-09-21 10:19:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:28,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:28,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:28,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:28,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:28,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:28,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:28,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 10:19:28,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696450933] [2020-09-21 10:19:28,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:28,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:19:28,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407803558] [2020-09-21 10:19:28,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:19:28,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:28,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:19:28,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:19:28,474 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 14 states. [2020-09-21 10:19:28,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:28,635 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-09-21 10:19:28,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:19:28,635 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-09-21 10:19:28,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:28,636 INFO L225 Difference]: With dead ends: 66 [2020-09-21 10:19:28,636 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:19:28,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:19:28,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:19:28,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:19:28,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:19:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:19:28,639 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-09-21 10:19:28,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:28,639 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:19:28,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:19:28,639 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:19:28,639 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:19:28,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:19:28,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:19:28,672 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 10:19:28,672 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:19:28,672 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-21 10:19:28,672 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-09-21 10:19:28,672 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-21 10:19:28,673 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-21 10:19:28,673 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-09-21 10:19:28,673 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-09-21 10:19:28,673 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-09-21 10:19:28,673 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:19:28,673 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:19:28,674 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:19:28,674 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:19:28,674 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-09-21 10:19:28,674 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-09-21 10:19:28,674 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-09-21 10:19:28,674 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-09-21 10:19:28,675 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-09-21 10:19:28,675 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-09-21 10:19:28,675 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-09-21 10:19:28,675 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-09-21 10:19:28,675 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-09-21 10:19:28,675 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-09-21 10:19:28,675 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-09-21 10:19:28,676 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-09-21 10:19:28,676 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-21 10:19:28,676 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-09-21 10:19:28,676 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-09-21 10:19:28,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:19:28 BoogieIcfgContainer [2020-09-21 10:19:28,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:19:28,688 INFO L168 Benchmark]: Toolchain (without parser) took 4362.01 ms. Allocated memory was 138.9 MB in the beginning and 247.5 MB in the end (delta: 108.5 MB). Free memory was 102.2 MB in the beginning and 103.2 MB in the end (delta: -1.1 MB). Peak memory consumption was 107.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:28,690 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 10:19:28,690 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.72 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 91.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:28,691 INFO L168 Benchmark]: Boogie Preprocessor took 110.75 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.5 MB in the beginning and 181.0 MB in the end (delta: -89.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:28,692 INFO L168 Benchmark]: RCFGBuilder took 329.78 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 168.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:28,693 INFO L168 Benchmark]: TraceAbstraction took 3555.90 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 167.3 MB in the beginning and 103.2 MB in the end (delta: 64.1 MB). Peak memory consumption was 109.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:28,697 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 341.72 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 91.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.75 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.5 MB in the beginning and 181.0 MB in the end (delta: -89.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 329.78 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 168.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3555.90 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 167.3 MB in the beginning and 103.2 MB in the end (delta: 64.1 MB). Peak memory consumption was 109.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 245 SDtfs, 32 SDslu, 1737 SDs, 0 SdLazy, 450 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, 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, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 23450 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 53/77 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...