/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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 16:39:20,417 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 16:39:20,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:39:20,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:39:20,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:39:20,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:39:20,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:39:20,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:39:20,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:39:20,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:39:20,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:39:20,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:39:20,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:39:20,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:39:20,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:39:20,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:39:20,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:39:20,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:39:20,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:39:20,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:39:20,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:39:20,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:39:20,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 16:39:20,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:39:20,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:39:20,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:39:20,544 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 16:39:20,584 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:39:20,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:39:20,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:39:20,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:39:20,588 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:39:20,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:39:20,588 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:39:20,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:39:20,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:39:20,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:39:20,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:39:20,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:39:20,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:39:20,591 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:39:20,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:39:20,591 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:39:20,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:39:20,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:39:20,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:39:20,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:39:20,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:39:20,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:39:20,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:39:20,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:39:20,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:39:20,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:39:20,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:39:20,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:39:20,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:39:20,594 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:39:20,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:39:20,915 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:39:20,919 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:39:20,921 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:39:20,921 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:39:20,922 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-21 16:39:20,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/863f4bffa/2fdd3c858a27452b942475f4e887ac49/FLAGcaf7f1eb3 [2020-08-21 16:39:21,438 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:39:21,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-21 16:39:21,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/863f4bffa/2fdd3c858a27452b942475f4e887ac49/FLAGcaf7f1eb3 [2020-08-21 16:39:21,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/863f4bffa/2fdd3c858a27452b942475f4e887ac49 [2020-08-21 16:39:21,816 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:39:21,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:39:21,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:21,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:39:21,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:39:21,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:21" (1/1) ... [2020-08-21 16:39:21,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe12ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:21, skipping insertion in model container [2020-08-21 16:39:21,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:21" (1/1) ... [2020-08-21 16:39:21,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:39:21,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:39:22,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:22,028 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:39:22,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:22,059 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:39:22,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:22 WrapperNode [2020-08-21 16:39:22,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:22,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:39:22,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:39:22,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:39:22,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:22" (1/1) ... [2020-08-21 16:39:22,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:22" (1/1) ... [2020-08-21 16:39:22,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:22" (1/1) ... [2020-08-21 16:39:22,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:22" (1/1) ... [2020-08-21 16:39:22,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:22" (1/1) ... [2020-08-21 16:39:22,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:22" (1/1) ... [2020-08-21 16:39:22,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:22" (1/1) ... [2020-08-21 16:39:22,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:39:22,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:39:22,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:39:22,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:39:22,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:39:22,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:39:22,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:39:22,242 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 16:39:22,243 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:39:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:39:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:39:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 16:39:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:39:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:39:22,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:39:22,434 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:39:22,434 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 16:39:22,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:22 BoogieIcfgContainer [2020-08-21 16:39:22,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:39:22,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:39:22,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:39:22,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:39:22,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:39:21" (1/3) ... [2020-08-21 16:39:22,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae71ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:22, skipping insertion in model container [2020-08-21 16:39:22,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:22" (2/3) ... [2020-08-21 16:39:22,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae71ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:22, skipping insertion in model container [2020-08-21 16:39:22,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:22" (3/3) ... [2020-08-21 16:39:22,465 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-21 16:39:22,505 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:39:22,513 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:39:22,536 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:39:22,584 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:39:22,584 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:39:22,585 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:39:22,585 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:39:22,585 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:39:22,585 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:39:22,585 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:39:22,585 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:39:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 16:39:22,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 16:39:22,608 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:22,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:22,609 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:22,614 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-21 16:39:22,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:22,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101229286] [2020-08-21 16:39:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:22,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:22,737 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 16:39:22,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101229286] [2020-08-21 16:39:22,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:22,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 16:39:22,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180558623] [2020-08-21 16:39:22,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 16:39:22,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:22,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 16:39:22,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 16:39:22,759 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-21 16:39:22,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:22,779 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-21 16:39:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 16:39:22,780 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 16:39:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:22,787 INFO L225 Difference]: With dead ends: 31 [2020-08-21 16:39:22,787 INFO L226 Difference]: Without dead ends: 14 [2020-08-21 16:39:22,791 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 16:39:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-21 16:39:22,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-21 16:39:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-21 16:39:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-21 16:39:22,824 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-21 16:39:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:22,824 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-21 16:39:22,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 16:39:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-21 16:39:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 16:39:22,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:22,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:22,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:39:22,826 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:22,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:22,827 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-21 16:39:22,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:22,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730816753] [2020-08-21 16:39:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:22,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:22,920 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 16:39:22,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730816753] [2020-08-21 16:39:22,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:22,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:39:22,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823622039] [2020-08-21 16:39:22,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:39:22,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:22,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:39:22,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:39:22,924 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-21 16:39:22,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:22,970 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-21 16:39:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:39:22,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-21 16:39:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:22,971 INFO L225 Difference]: With dead ends: 23 [2020-08-21 16:39:22,972 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 16:39:22,973 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 16:39:22,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 16:39:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 16:39:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 16:39:22,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-21 16:39:22,978 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-21 16:39:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:22,979 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-21 16:39:22,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:39:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-21 16:39:22,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 16:39:22,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:22,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:22,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:39:22,980 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:22,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:22,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-21 16:39:22,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:22,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003273309] [2020-08-21 16:39:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:23,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:23,232 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 16:39:23,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003273309] [2020-08-21 16:39:23,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:23,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:39:23,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754854858] [2020-08-21 16:39:23,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:39:23,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:23,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:39:23,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:39:23,235 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-21 16:39:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:23,342 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-21 16:39:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:39:23,343 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-21 16:39:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:23,346 INFO L225 Difference]: With dead ends: 33 [2020-08-21 16:39:23,346 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 16:39:23,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:39:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 16:39:23,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-21 16:39:23,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 16:39:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-21 16:39:23,354 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-21 16:39:23,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:23,354 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-21 16:39:23,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:39:23,354 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-21 16:39:23,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 16:39:23,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:23,356 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:23,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:39:23,356 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:23,357 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-21 16:39:23,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:23,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268087051] [2020-08-21 16:39:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:23,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:23,387 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 16:39:23,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268087051] [2020-08-21 16:39:23,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:23,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:39:23,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777118921] [2020-08-21 16:39:23,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:39:23,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:23,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:39:23,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:39:23,390 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-21 16:39:23,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:23,408 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-21 16:39:23,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:39:23,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 16:39:23,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:23,410 INFO L225 Difference]: With dead ends: 32 [2020-08-21 16:39:23,410 INFO L226 Difference]: Without dead ends: 19 [2020-08-21 16:39:23,411 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 16:39:23,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-21 16:39:23,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-21 16:39:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 16:39:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-21 16:39:23,416 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-21 16:39:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:23,417 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-21 16:39:23,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:39:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-21 16:39:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 16:39:23,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:23,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:23,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:39:23,418 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:23,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-21 16:39:23,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:23,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773329816] [2020-08-21 16:39:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:23,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:23,512 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 16:39:23,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773329816] [2020-08-21 16:39:23,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:23,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 16:39:23,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058212556] [2020-08-21 16:39:23,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:39:23,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:23,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:39:23,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:39:23,516 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-21 16:39:23,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:23,569 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 16:39:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:39:23,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-21 16:39:23,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:23,572 INFO L225 Difference]: With dead ends: 30 [2020-08-21 16:39:23,572 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 16:39:23,573 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 16:39:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 16:39:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-21 16:39:23,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 16:39:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-21 16:39:23,582 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-21 16:39:23,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:23,596 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-21 16:39:23,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:39:23,596 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-21 16:39:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 16:39:23,597 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:23,598 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:23,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:39:23,598 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:23,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-21 16:39:23,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:23,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805473926] [2020-08-21 16:39:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:23,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:23,909 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 16:39:23,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805473926] [2020-08-21 16:39:23,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:23,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 16:39:23,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976820698] [2020-08-21 16:39:23,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:39:23,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:23,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:39:23,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:39:23,914 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-21 16:39:24,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:24,098 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-21 16:39:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:39:24,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-21 16:39:24,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:24,104 INFO L225 Difference]: With dead ends: 31 [2020-08-21 16:39:24,104 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 16:39:24,105 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 16:39:24,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 16:39:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-21 16:39:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 16:39:24,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-21 16:39:24,112 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-21 16:39:24,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:24,113 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-21 16:39:24,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:39:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-21 16:39:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 16:39:24,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:24,114 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:24,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:39:24,114 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:24,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-21 16:39:24,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:24,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600861844] [2020-08-21 16:39:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:24,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:24,174 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 16:39:24,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600861844] [2020-08-21 16:39:24,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:24,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 16:39:24,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106635989] [2020-08-21 16:39:24,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:39:24,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:24,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:39:24,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:39:24,177 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-21 16:39:24,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:24,215 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-21 16:39:24,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:39:24,216 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-21 16:39:24,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:24,217 INFO L225 Difference]: With dead ends: 38 [2020-08-21 16:39:24,217 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 16:39:24,217 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 16:39:24,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 16:39:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-21 16:39:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 16:39:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-21 16:39:24,223 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-21 16:39:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:24,224 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-21 16:39:24,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:39:24,224 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-21 16:39:24,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 16:39:24,225 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:24,225 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:24,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:39:24,225 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:24,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:24,226 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-21 16:39:24,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:24,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263523224] [2020-08-21 16:39:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:24,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:24,307 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 16:39:24,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263523224] [2020-08-21 16:39:24,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:24,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:39:24,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708754205] [2020-08-21 16:39:24,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:39:24,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:24,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:39:24,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:39:24,310 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-21 16:39:24,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:24,373 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-21 16:39:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:39:24,374 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-21 16:39:24,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:24,375 INFO L225 Difference]: With dead ends: 42 [2020-08-21 16:39:24,375 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 16:39:24,376 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 16:39:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 16:39:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-21 16:39:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 16:39:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-21 16:39:24,382 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-21 16:39:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:24,382 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-21 16:39:24,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:39:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-21 16:39:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 16:39:24,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:24,384 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:24,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:39:24,384 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:24,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:24,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-21 16:39:24,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:24,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765591711] [2020-08-21 16:39:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:24,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:24,521 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 16:39:24,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765591711] [2020-08-21 16:39:24,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:24,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 16:39:24,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580263911] [2020-08-21 16:39:24,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 16:39:24,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:24,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 16:39:24,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:39:24,528 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-21 16:39:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:24,608 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-21 16:39:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:39:24,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-21 16:39:24,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:24,609 INFO L225 Difference]: With dead ends: 46 [2020-08-21 16:39:24,610 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 16:39:24,610 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 16:39:24,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 16:39:24,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-21 16:39:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 16:39:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-21 16:39:24,618 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-21 16:39:24,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:24,618 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-21 16:39:24,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 16:39:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-21 16:39:24,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 16:39:24,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:24,620 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:24,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:39:24,620 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:24,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:24,621 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-21 16:39:24,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:24,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884073806] [2020-08-21 16:39:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 16:39:24,667 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 16:39:24,667 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:39:24,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:39:24,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:39:24 BoogieIcfgContainer [2020-08-21 16:39:24,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:39:24,702 INFO L168 Benchmark]: Toolchain (without parser) took 2882.68 ms. Allocated memory was 147.3 MB in the beginning and 234.9 MB in the end (delta: 87.6 MB). Free memory was 103.5 MB in the beginning and 96.0 MB in the end (delta: 7.5 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:24,703 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 16:39:24,704 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.29 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 93.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:24,705 INFO L168 Benchmark]: Boogie Preprocessor took 114.10 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.9 MB in the beginning and 182.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:24,711 INFO L168 Benchmark]: RCFGBuilder took 263.62 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:24,713 INFO L168 Benchmark]: TraceAbstraction took 2248.45 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 169.3 MB in the beginning and 96.0 MB in the end (delta: 73.3 MB). Peak memory consumption was 105.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:24,722 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.29 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 93.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.10 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.9 MB in the beginning and 182.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 263.62 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2248.45 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 169.3 MB in the beginning and 96.0 MB in the end (delta: 73.3 MB). Peak memory consumption was 105.3 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