/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:58:35,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:58:35,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:58:36,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:58:36,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:58:36,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:58:36,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:58:36,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:58:36,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:58:36,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:58:36,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:58:36,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:58:36,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:58:36,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:58:36,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:58:36,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:58:36,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:58:36,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:58:36,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:58:36,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:58:36,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:58:36,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:58:36,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:58:36,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:58:36,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-27 21:58:36,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:58:36,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:58:36,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:58:36,081 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 [2020-08-27 21:58:36,108 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:58:36,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:58:36,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:58:36,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:58:36,110 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:58:36,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:58:36,111 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:58:36,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:58:36,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:58:36,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:58:36,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:58:36,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:58:36,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:58:36,112 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:58:36,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:58:36,113 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:58:36,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:58:36,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:58:36,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:58:36,114 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:58:36,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:58:36,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:58:36,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:58:36,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:58:36,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:58:36,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:58:36,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:58:36,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:58:36,116 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:58:36,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-27 21:58:36,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:58:36,662 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:58:36,667 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:58:36,669 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:58:36,669 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:58:36,671 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-08-27 21:58:36,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5be266bfa/a0ceeb7155fb4285bc4317ff5a317197/FLAGca81f835f [2020-08-27 21:58:37,303 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:58:37,304 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-08-27 21:58:37,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5be266bfa/a0ceeb7155fb4285bc4317ff5a317197/FLAGca81f835f [2020-08-27 21:58:37,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5be266bfa/a0ceeb7155fb4285bc4317ff5a317197 [2020-08-27 21:58:37,653 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:58:37,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:58:37,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:58:37,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:58:37,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:58:37,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:58:37" (1/1) ... [2020-08-27 21:58:37,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54bef0fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:37, skipping insertion in model container [2020-08-27 21:58:37,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:58:37" (1/1) ... [2020-08-27 21:58:37,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:58:37,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:58:37,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:58:37,918 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:58:37,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:58:37,956 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:58:37,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:37 WrapperNode [2020-08-27 21:58:37,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:58:37,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:58:37,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:58:37,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:58:37,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:37" (1/1) ... [2020-08-27 21:58:37,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:37" (1/1) ... [2020-08-27 21:58:37,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:37" (1/1) ... [2020-08-27 21:58:37,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:37" (1/1) ... [2020-08-27 21:58:37,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:37" (1/1) ... [2020-08-27 21:58:37,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:37" (1/1) ... [2020-08-27 21:58:37,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:37" (1/1) ... [2020-08-27 21:58:38,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:58:38,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:58:38,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:58:38,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:58:38,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:37" (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 [2020-08-27 21:58:38,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:58:38,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:58:38,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-27 21:58:38,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:58:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:58:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-27 21:58:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-27 21:58:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:58:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:58:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:58:38,358 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:58:38,358 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-27 21:58:38,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:58:38 BoogieIcfgContainer [2020-08-27 21:58:38,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:58:38,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:58:38,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:58:38,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:58:38,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:58:37" (1/3) ... [2020-08-27 21:58:38,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e212e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:58:38, skipping insertion in model container [2020-08-27 21:58:38,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:37" (2/3) ... [2020-08-27 21:58:38,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e212e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:58:38, skipping insertion in model container [2020-08-27 21:58:38,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:58:38" (3/3) ... [2020-08-27 21:58:38,375 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-08-27 21:58:38,388 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:58:38,398 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:58:38,422 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:58:38,469 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:58:38,469 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:58:38,469 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:58:38,470 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:58:38,470 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:58:38,470 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:58:38,471 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:58:38,471 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:58:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-27 21:58:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-27 21:58:38,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:38,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:38,512 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:38,521 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-08-27 21:58:38,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:38,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68837590] [2020-08-27 21:58:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:38,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:58:38,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68837590] [2020-08-27 21:58:38,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:58:38,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-27 21:58:38,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814417668] [2020-08-27 21:58:38,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-27 21:58:38,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:38,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-27 21:58:38,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-27 21:58:38,750 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-27 21:58:38,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:38,787 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-27 21:58:38,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-27 21:58:38,789 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-27 21:58:38,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:38,803 INFO L225 Difference]: With dead ends: 30 [2020-08-27 21:58:38,803 INFO L226 Difference]: Without dead ends: 13 [2020-08-27 21:58:38,809 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 [2020-08-27 21:58:38,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-27 21:58:38,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-27 21:58:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-27 21:58:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-27 21:58:38,873 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-27 21:58:38,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:38,874 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-27 21:58:38,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-27 21:58:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-27 21:58:38,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-27 21:58:38,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:38,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:38,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:58:38,878 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:38,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:38,879 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-08-27 21:58:38,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:38,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016564890] [2020-08-27 21:58:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:39,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:58:39,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016564890] [2020-08-27 21:58:39,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:58:39,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:58:39,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793277232] [2020-08-27 21:58:39,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:58:39,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:39,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:58:39,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:58:39,018 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-08-27 21:58:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:39,067 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-08-27 21:58:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:58:39,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-27 21:58:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:39,069 INFO L225 Difference]: With dead ends: 21 [2020-08-27 21:58:39,069 INFO L226 Difference]: Without dead ends: 16 [2020-08-27 21:58:39,070 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 [2020-08-27 21:58:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-27 21:58:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-27 21:58:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-27 21:58:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-27 21:58:39,076 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-08-27 21:58:39,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:39,077 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-27 21:58:39,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:58:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-27 21:58:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-27 21:58:39,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:39,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:39,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:58:39,079 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:39,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-08-27 21:58:39,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:39,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842775244] [2020-08-27 21:58:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:39,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:58:39,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842775244] [2020-08-27 21:58:39,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:58:39,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-27 21:58:39,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219867195] [2020-08-27 21:58:39,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-27 21:58:39,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:39,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-27 21:58:39,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-27 21:58:39,340 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2020-08-27 21:58:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:39,462 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-27 21:58:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:58:39,463 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-08-27 21:58:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:39,466 INFO L225 Difference]: With dead ends: 28 [2020-08-27 21:58:39,466 INFO L226 Difference]: Without dead ends: 23 [2020-08-27 21:58:39,467 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 [2020-08-27 21:58:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-27 21:58:39,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-08-27 21:58:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-27 21:58:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-08-27 21:58:39,474 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-08-27 21:58:39,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:39,475 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-08-27 21:58:39,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-27 21:58:39,475 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-08-27 21:58:39,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-27 21:58:39,476 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:39,476 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:39,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:58:39,476 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:39,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:39,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-08-27 21:58:39,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:39,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690619981] [2020-08-27 21:58:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:39,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-27 21:58:39,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690619981] [2020-08-27 21:58:39,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:58:39,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:58:39,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530182567] [2020-08-27 21:58:39,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:58:39,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:39,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:58:39,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:58:39,531 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-08-27 21:58:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:39,555 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-27 21:58:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:58:39,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-27 21:58:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:39,557 INFO L225 Difference]: With dead ends: 28 [2020-08-27 21:58:39,557 INFO L226 Difference]: Without dead ends: 17 [2020-08-27 21:58:39,558 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 [2020-08-27 21:58:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-27 21:58:39,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-27 21:58:39,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-27 21:58:39,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-08-27 21:58:39,564 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2020-08-27 21:58:39,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:39,565 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-08-27 21:58:39,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:58:39,565 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-08-27 21:58:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-27 21:58:39,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:39,566 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:39,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:58:39,567 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:39,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:39,567 INFO L82 PathProgramCache]: Analyzing trace with hash 57842105, now seen corresponding path program 2 times [2020-08-27 21:58:39,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:39,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513674899] [2020-08-27 21:58:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:39,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:58:39,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513674899] [2020-08-27 21:58:39,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:58:39,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-27 21:58:39,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939790638] [2020-08-27 21:58:39,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:58:39,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:39,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:58:39,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:58:39,609 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-08-27 21:58:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:39,637 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-08-27 21:58:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:58:39,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-27 21:58:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:39,639 INFO L225 Difference]: With dead ends: 27 [2020-08-27 21:58:39,639 INFO L226 Difference]: Without dead ends: 19 [2020-08-27 21:58:39,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:58:39,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-27 21:58:39,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-08-27 21:58:39,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-27 21:58:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-27 21:58:39,646 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-08-27 21:58:39,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:39,646 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-27 21:58:39,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:58:39,647 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-27 21:58:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-27 21:58:39,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:39,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:39,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:58:39,648 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:39,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:39,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-08-27 21:58:39,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:39,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770980661] [2020-08-27 21:58:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:39,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-27 21:58:39,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770980661] [2020-08-27 21:58:39,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:58:39,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-27 21:58:39,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313150566] [2020-08-27 21:58:39,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:58:39,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:39,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:58:39,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:58:39,887 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-08-27 21:58:40,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:40,056 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-08-27 21:58:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:58:40,057 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-08-27 21:58:40,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:40,058 INFO L225 Difference]: With dead ends: 27 [2020-08-27 21:58:40,058 INFO L226 Difference]: Without dead ends: 22 [2020-08-27 21:58:40,058 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 [2020-08-27 21:58:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-27 21:58:40,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-27 21:58:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-27 21:58:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-08-27 21:58:40,064 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-08-27 21:58:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:40,064 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-08-27 21:58:40,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:58:40,065 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-08-27 21:58:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-27 21:58:40,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:40,065 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:40,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:58:40,066 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:40,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:40,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 3 times [2020-08-27 21:58:40,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:40,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039935514] [2020-08-27 21:58:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:40,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:58:40,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039935514] [2020-08-27 21:58:40,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:58:40,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-27 21:58:40,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340314183] [2020-08-27 21:58:40,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:58:40,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:40,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:58:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:58:40,114 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-08-27 21:58:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:40,145 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-27 21:58:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:58:40,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-27 21:58:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:40,146 INFO L225 Difference]: With dead ends: 33 [2020-08-27 21:58:40,146 INFO L226 Difference]: Without dead ends: 25 [2020-08-27 21:58:40,147 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 [2020-08-27 21:58:40,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-27 21:58:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-27 21:58:40,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-27 21:58:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-27 21:58:40,153 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-08-27 21:58:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:40,153 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-27 21:58:40,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:58:40,154 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-27 21:58:40,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-27 21:58:40,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:40,155 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:40,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:58:40,155 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:40,156 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 4 times [2020-08-27 21:58:40,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:40,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969948284] [2020-08-27 21:58:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:40,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:58:40,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969948284] [2020-08-27 21:58:40,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:58:40,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-27 21:58:40,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59678150] [2020-08-27 21:58:40,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:58:40,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:40,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:58:40,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:58:40,214 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-08-27 21:58:40,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:40,250 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-27 21:58:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:58:40,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-27 21:58:40,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:40,252 INFO L225 Difference]: With dead ends: 36 [2020-08-27 21:58:40,252 INFO L226 Difference]: Without dead ends: 28 [2020-08-27 21:58:40,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:58:40,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-27 21:58:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-27 21:58:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-27 21:58:40,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-27 21:58:40,258 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-08-27 21:58:40,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:40,258 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-27 21:58:40,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:58:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-27 21:58:40,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-27 21:58:40,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:40,260 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:40,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:58:40,260 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:40,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:40,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 5 times [2020-08-27 21:58:40,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:40,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914976109] [2020-08-27 21:58:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:40,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:58:40,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914976109] [2020-08-27 21:58:40,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:58:40,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-27 21:58:40,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947503328] [2020-08-27 21:58:40,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 21:58:40,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:40,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 21:58:40,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:58:40,325 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-08-27 21:58:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:40,367 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-27 21:58:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:58:40,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-27 21:58:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:40,368 INFO L225 Difference]: With dead ends: 39 [2020-08-27 21:58:40,368 INFO L226 Difference]: Without dead ends: 31 [2020-08-27 21:58:40,369 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 [2020-08-27 21:58:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-27 21:58:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-08-27 21:58:40,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-27 21:58:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-27 21:58:40,374 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-08-27 21:58:40,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:40,375 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-27 21:58:40,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 21:58:40,375 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-27 21:58:40,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-27 21:58:40,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:40,376 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:40,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:58:40,376 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:40,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:40,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 6 times [2020-08-27 21:58:40,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:40,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993423811] [2020-08-27 21:58:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:40,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:58:40,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993423811] [2020-08-27 21:58:40,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:58:40,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-27 21:58:40,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467407830] [2020-08-27 21:58:40,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:58:40,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:40,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:58:40,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:58:40,452 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-08-27 21:58:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:40,498 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-27 21:58:40,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-27 21:58:40,499 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-27 21:58:40,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:40,500 INFO L225 Difference]: With dead ends: 42 [2020-08-27 21:58:40,500 INFO L226 Difference]: Without dead ends: 34 [2020-08-27 21:58:40,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:58:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-27 21:58:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-27 21:58:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-27 21:58:40,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-27 21:58:40,506 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-08-27 21:58:40,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:40,507 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-27 21:58:40,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:58:40,507 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-27 21:58:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-27 21:58:40,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:40,508 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:40,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:58:40,508 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:40,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:40,509 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 7 times [2020-08-27 21:58:40,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:40,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533914920] [2020-08-27 21:58:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:40,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:58:40,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533914920] [2020-08-27 21:58:40,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:58:40,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-27 21:58:40,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906150834] [2020-08-27 21:58:40,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-27 21:58:40,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:40,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-27 21:58:40,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-27 21:58:40,600 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-08-27 21:58:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:40,663 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-08-27 21:58:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:58:40,665 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-27 21:58:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:40,666 INFO L225 Difference]: With dead ends: 45 [2020-08-27 21:58:40,667 INFO L226 Difference]: Without dead ends: 37 [2020-08-27 21:58:40,667 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 [2020-08-27 21:58:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-27 21:58:40,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-27 21:58:40,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-27 21:58:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-27 21:58:40,677 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-08-27 21:58:40,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:40,677 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-27 21:58:40,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-27 21:58:40,677 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-27 21:58:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-27 21:58:40,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:40,680 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:40,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-27 21:58:40,682 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:40,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:40,682 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 8 times [2020-08-27 21:58:40,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:40,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386044139] [2020-08-27 21:58:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:40,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:58:40,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386044139] [2020-08-27 21:58:40,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:58:40,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-27 21:58:40,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850968620] [2020-08-27 21:58:40,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:58:40,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:40,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:58:40,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:58:40,836 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-08-27 21:58:40,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:40,903 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-08-27 21:58:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-27 21:58:40,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-08-27 21:58:40,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:40,904 INFO L225 Difference]: With dead ends: 48 [2020-08-27 21:58:40,904 INFO L226 Difference]: Without dead ends: 40 [2020-08-27 21:58:40,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:58:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-27 21:58:40,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-27 21:58:40,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-27 21:58:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-27 21:58:40,912 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-08-27 21:58:40,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:40,913 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-27 21:58:40,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:58:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-27 21:58:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-27 21:58:40,916 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:40,916 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:40,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-27 21:58:40,917 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:40,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:40,917 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 9 times [2020-08-27 21:58:40,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:40,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281055068] [2020-08-27 21:58:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:41,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:58:41,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281055068] [2020-08-27 21:58:41,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:58:41,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-27 21:58:41,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449228643] [2020-08-27 21:58:41,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-27 21:58:41,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:41,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-27 21:58:41,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-27 21:58:41,074 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-08-27 21:58:41,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:41,152 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-08-27 21:58:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-27 21:58:41,153 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-08-27 21:58:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:41,154 INFO L225 Difference]: With dead ends: 51 [2020-08-27 21:58:41,154 INFO L226 Difference]: Without dead ends: 43 [2020-08-27 21:58:41,154 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 [2020-08-27 21:58:41,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-27 21:58:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-08-27 21:58:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-27 21:58:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-27 21:58:41,163 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-08-27 21:58:41,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:41,163 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-27 21:58:41,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-27 21:58:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-27 21:58:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-27 21:58:41,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:41,166 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:58:41,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-27 21:58:41,167 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:41,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:41,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 10 times [2020-08-27 21:58:41,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:41,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070710438] [2020-08-27 21:58:41,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-27 21:58:41,204 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-27 21:58:41,204 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-27 21:58:41,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-27 21:58:41,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:58:41 BoogieIcfgContainer [2020-08-27 21:58:41,240 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:58:41,244 INFO L168 Benchmark]: Toolchain (without parser) took 3587.08 ms. Allocated memory was 140.0 MB in the beginning and 246.9 MB in the end (delta: 107.0 MB). Free memory was 103.6 MB in the beginning and 182.6 MB in the end (delta: -79.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. [2020-08-27 21:58:41,245 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-27 21:58:41,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.56 ms. Allocated memory is still 140.0 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. [2020-08-27 21:58:41,247 INFO L168 Benchmark]: Boogie Preprocessor took 110.01 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 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 13.5 MB. Max. memory is 7.1 GB. [2020-08-27 21:58:41,254 INFO L168 Benchmark]: RCFGBuilder took 295.35 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 170.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-27 21:58:41,259 INFO L168 Benchmark]: TraceAbstraction took 2875.36 ms. Allocated memory was 202.9 MB in the beginning and 246.9 MB in the end (delta: 44.0 MB). Free memory was 169.8 MB in the beginning and 182.6 MB in the end (delta: -12.8 MB). Peak memory consumption was 31.3 MB. Max. memory is 7.1 GB. [2020-08-27 21:58:41,264 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.56 ms. Allocated memory is still 140.0 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 110.01 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 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 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 295.35 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 170.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2875.36 ms. Allocated memory was 202.9 MB in the beginning and 246.9 MB in the end (delta: 44.0 MB). Free memory was 169.8 MB in the beginning and 182.6 MB in the end (delta: -12.8 MB). Peak memory consumption was 31.3 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, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 147 SDtfs, 59 SDslu, 484 SDs, 0 SdLazy, 391 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 12 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 16404 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 86/415 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...