/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:15:57,072 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 18:15:57,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:15:57,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:15:57,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:15:57,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:15:57,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:15:57,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:15:57,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:15:57,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:15:57,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:15:57,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:15:57,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:15:57,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:15:57,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:15:57,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:15:57,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:15:57,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:15:57,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:15:57,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:15:57,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:15:57,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:15:57,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 18:15:57,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:15:57,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:15:57,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:15:57,197 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 [2020-08-21 18:15:57,219 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:15:57,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:15:57,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:15:57,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:15:57,221 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:15:57,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:15:57,221 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:15:57,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:15:57,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:15:57,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:15:57,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:15:57,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:15:57,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:15:57,223 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:15:57,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:15:57,223 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:15:57,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:15:57,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:15:57,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:15:57,224 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:15:57,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:15:57,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:15:57,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:15:57,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:15:57,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:15:57,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:15:57,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:15:57,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:15:57,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:15:57,226 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=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:15:57,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:15:57,571 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:15:57,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:15:57,580 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:15:57,580 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:15:57,581 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-21 18:15:57,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97396ed1e/fdcd7b59ddcd477ea19b467816dc8fb5/FLAGe64d2c984 [2020-08-21 18:15:58,081 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:15:58,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-21 18:15:58,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97396ed1e/fdcd7b59ddcd477ea19b467816dc8fb5/FLAGe64d2c984 [2020-08-21 18:15:58,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97396ed1e/fdcd7b59ddcd477ea19b467816dc8fb5 [2020-08-21 18:15:58,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:15:58,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:15:58,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:15:58,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:15:58,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:15:58,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:15:58" (1/1) ... [2020-08-21 18:15:58,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e20dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:58, skipping insertion in model container [2020-08-21 18:15:58,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:15:58" (1/1) ... [2020-08-21 18:15:58,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:15:58,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:15:58,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:15:58,736 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:15:58,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:15:58,773 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:15:58,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:58 WrapperNode [2020-08-21 18:15:58,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:15:58,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:15:58,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:15:58,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:15:58,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:58" (1/1) ... [2020-08-21 18:15:58,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:58" (1/1) ... [2020-08-21 18:15:58,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:58" (1/1) ... [2020-08-21 18:15:58,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:58" (1/1) ... [2020-08-21 18:15:58,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:58" (1/1) ... [2020-08-21 18:15:58,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:58" (1/1) ... [2020-08-21 18:15:58,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:58" (1/1) ... [2020-08-21 18:15:58,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:15:58,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:15:58,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:15:58,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:15:58,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:58" (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 [2020-08-21 18:15:58,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:15:58,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:15:58,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 18:15:58,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:15:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:15:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 18:15:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 18:15:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:15:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:15:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:15:59,143 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:15:59,143 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:15:59,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:15:59 BoogieIcfgContainer [2020-08-21 18:15:59,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:15:59,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:15:59,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:15:59,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:15:59,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:15:58" (1/3) ... [2020-08-21 18:15:59,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2747be04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:15:59, skipping insertion in model container [2020-08-21 18:15:59,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:58" (2/3) ... [2020-08-21 18:15:59,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2747be04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:15:59, skipping insertion in model container [2020-08-21 18:15:59,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:15:59" (3/3) ... [2020-08-21 18:15:59,156 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-21 18:15:59,167 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:15:59,175 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:15:59,190 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:15:59,248 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:15:59,248 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:15:59,248 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:15:59,252 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:15:59,252 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:15:59,252 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:15:59,252 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:15:59,253 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:15:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 18:15:59,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 18:15:59,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:59,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:15:59,299 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:59,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:59,307 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-21 18:15:59,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:59,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114568260] [2020-08-21 18:15:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:59,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:15:59,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114568260] [2020-08-21 18:15:59,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:15:59,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 18:15:59,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756705684] [2020-08-21 18:15:59,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 18:15:59,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:59,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 18:15:59,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 18:15:59,473 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-21 18:15:59,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:59,498 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-21 18:15:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 18:15:59,499 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 18:15:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:59,508 INFO L225 Difference]: With dead ends: 31 [2020-08-21 18:15:59,508 INFO L226 Difference]: Without dead ends: 14 [2020-08-21 18:15:59,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 18:15:59,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-21 18:15:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-21 18:15:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-21 18:15:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-21 18:15:59,552 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-21 18:15:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:59,553 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-21 18:15:59,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 18:15:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-21 18:15:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 18:15:59,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:59,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:15:59,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:15:59,555 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:59,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:59,555 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-21 18:15:59,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:59,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223271063] [2020-08-21 18:15:59,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:59,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:15:59,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223271063] [2020-08-21 18:15:59,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:15:59,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:15:59,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354402084] [2020-08-21 18:15:59,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:15:59,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:59,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:15:59,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:15:59,654 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-21 18:15:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:59,715 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-21 18:15:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:15:59,716 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-21 18:15:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:59,717 INFO L225 Difference]: With dead ends: 23 [2020-08-21 18:15:59,717 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 18:15:59,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:15:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 18:15:59,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 18:15:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 18:15:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-21 18:15:59,724 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-21 18:15:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:59,725 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-21 18:15:59,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:15:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-21 18:15:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 18:15:59,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:59,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:15:59,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:15:59,727 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:59,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-21 18:15:59,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:59,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350439768] [2020-08-21 18:15:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:59,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:00,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350439768] [2020-08-21 18:16:00,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:00,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:16:00,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190907058] [2020-08-21 18:16:00,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:16:00,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:00,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:16:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:16:00,006 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-21 18:16:00,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:00,121 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-21 18:16:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:16:00,122 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-21 18:16:00,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:00,125 INFO L225 Difference]: With dead ends: 33 [2020-08-21 18:16:00,125 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 18:16:00,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:16:00,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 18:16:00,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-21 18:16:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 18:16:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-21 18:16:00,134 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-21 18:16:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:00,134 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-21 18:16:00,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:16:00,135 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-21 18:16:00,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 18:16:00,135 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:00,136 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:00,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:16:00,136 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:00,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:00,137 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-21 18:16:00,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:00,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861291403] [2020-08-21 18:16:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 18:16:00,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861291403] [2020-08-21 18:16:00,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:16:00,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:16:00,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483600017] [2020-08-21 18:16:00,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:16:00,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:00,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:16:00,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:16:00,218 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-21 18:16:00,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:00,248 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-21 18:16:00,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:16:00,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 18:16:00,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:00,250 INFO L225 Difference]: With dead ends: 32 [2020-08-21 18:16:00,250 INFO L226 Difference]: Without dead ends: 19 [2020-08-21 18:16:00,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:16:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-21 18:16:00,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-21 18:16:00,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 18:16:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-21 18:16:00,262 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-21 18:16:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:00,263 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-21 18:16:00,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:16:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-21 18:16:00,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 18:16:00,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:00,265 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:00,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:16:00,266 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:00,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:00,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-21 18:16:00,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:00,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346742619] [2020-08-21 18:16:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:00,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346742619] [2020-08-21 18:16:00,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:00,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 18:16:00,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399967637] [2020-08-21 18:16:00,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:16:00,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:00,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:16:00,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:16:00,354 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-21 18:16:00,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:00,396 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 18:16:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:16:00,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-21 18:16:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:00,398 INFO L225 Difference]: With dead ends: 30 [2020-08-21 18:16:00,398 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 18:16:00,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:16:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 18:16:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-21 18:16:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 18:16:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-21 18:16:00,405 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-21 18:16:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:00,406 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-21 18:16:00,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:16:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-21 18:16:00,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 18:16:00,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:00,407 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:00,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:16:00,408 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:00,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-21 18:16:00,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:00,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115739177] [2020-08-21 18:16:00,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 18:16:00,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115739177] [2020-08-21 18:16:00,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:00,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 18:16:00,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118076056] [2020-08-21 18:16:00,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:16:00,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:00,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:16:00,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:16:00,685 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-21 18:16:00,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:00,869 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-21 18:16:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:16:00,872 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-21 18:16:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:00,873 INFO L225 Difference]: With dead ends: 31 [2020-08-21 18:16:00,873 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 18:16:00,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:16:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 18:16:00,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-21 18:16:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 18:16:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-21 18:16:00,879 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-21 18:16:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:00,879 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-21 18:16:00,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:16:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-21 18:16:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:16:00,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:00,881 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:00,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:16:00,881 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:00,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-21 18:16:00,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:00,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715675154] [2020-08-21 18:16:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:00,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715675154] [2020-08-21 18:16:00,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:00,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 18:16:00,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605798198] [2020-08-21 18:16:00,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:16:00,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:00,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:16:00,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:16:00,942 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-21 18:16:00,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:00,979 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-21 18:16:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:16:00,980 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-21 18:16:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:00,981 INFO L225 Difference]: With dead ends: 38 [2020-08-21 18:16:00,981 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 18:16:00,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:16:00,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 18:16:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-21 18:16:00,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 18:16:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-21 18:16:00,987 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-21 18:16:00,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:00,987 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-21 18:16:00,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:16:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-21 18:16:00,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:16:00,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:00,988 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:00,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:16:00,989 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:00,989 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-21 18:16:00,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:00,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421364677] [2020-08-21 18:16:00,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:01,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:01,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421364677] [2020-08-21 18:16:01,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:01,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:16:01,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601567013] [2020-08-21 18:16:01,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:16:01,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:01,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:16:01,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:16:01,068 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-21 18:16:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:01,124 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-21 18:16:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:16:01,125 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-21 18:16:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:01,126 INFO L225 Difference]: With dead ends: 42 [2020-08-21 18:16:01,126 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 18:16:01,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:16:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 18:16:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-21 18:16:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 18:16:01,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-21 18:16:01,132 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-21 18:16:01,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:01,132 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-21 18:16:01,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:16:01,133 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-21 18:16:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 18:16:01,133 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:01,134 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:01,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:16:01,134 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:01,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:01,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-21 18:16:01,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:01,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846313333] [2020-08-21 18:16:01,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:01,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:01,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846313333] [2020-08-21 18:16:01,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:01,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 18:16:01,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964380779] [2020-08-21 18:16:01,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 18:16:01,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:01,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 18:16:01,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:16:01,240 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-21 18:16:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:01,310 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-21 18:16:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 18:16:01,310 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-21 18:16:01,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:01,311 INFO L225 Difference]: With dead ends: 46 [2020-08-21 18:16:01,312 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 18:16:01,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:16:01,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 18:16:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-21 18:16:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 18:16:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-21 18:16:01,319 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-21 18:16:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:01,319 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-21 18:16:01,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 18:16:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-21 18:16:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 18:16:01,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:01,321 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:01,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:16:01,322 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:01,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:01,322 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-21 18:16:01,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:01,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183794559] [2020-08-21 18:16:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:16:01,353 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:16:01,354 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:16:01,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:16:01,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:16:01 BoogieIcfgContainer [2020-08-21 18:16:01,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:16:01,386 INFO L168 Benchmark]: Toolchain (without parser) took 2890.50 ms. Allocated memory was 138.9 MB in the beginning and 233.8 MB in the end (delta: 94.9 MB). Free memory was 101.8 MB in the beginning and 96.9 MB in the end (delta: 4.9 MB). Peak memory consumption was 99.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:01,387 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 18:16:01,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.58 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:01,389 INFO L168 Benchmark]: Boogie Preprocessor took 109.65 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 92.2 MB in the beginning and 179.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:01,394 INFO L168 Benchmark]: RCFGBuilder took 262.37 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 166.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:01,395 INFO L168 Benchmark]: TraceAbstraction took 2235.14 ms. Allocated memory was 200.8 MB in the beginning and 233.8 MB in the end (delta: 33.0 MB). Free memory was 166.1 MB in the beginning and 96.9 MB in the end (delta: 69.2 MB). Peak memory consumption was 102.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:01,406 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 278.58 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.65 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 92.2 MB in the beginning and 179.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 262.37 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 166.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2235.14 ms. Allocated memory was 200.8 MB in the beginning and 233.8 MB in the end (delta: 33.0 MB). Free memory was 166.1 MB in the beginning and 96.9 MB in the end (delta: 69.2 MB). Peak memory consumption was 102.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i