/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 0.1.25-5644d1e-m [2020-08-18 15:35:44,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:35:44,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:35:44,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:35:44,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:35:44,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:35:44,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:35:44,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:35:44,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:35:44,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:35:44,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:35:44,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:35:44,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:35:44,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:35:44,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:35:44,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:35:44,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:35:44,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:35:44,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:35:44,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:35:44,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:35:44,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:35:44,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:35:44,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:35:44,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:35:44,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:35:44,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:35:44,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:35:44,439 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 15:35:44,480 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:35:44,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:35:44,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:35:44,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:35:44,483 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:35:44,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:35:44,483 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:35:44,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:35:44,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:35:44,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:35:44,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:35:44,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:35:44,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:35:44,486 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:35:44,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:35:44,486 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:35:44,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:35:44,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:35:44,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:35:44,487 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:35:44,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:35:44,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:35:44,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:35:44,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:35:44,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:35:44,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:35:44,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:35:44,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:35:44,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:35:44,490 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 [2020-08-18 15:35:44,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:35:44,817 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:35:44,821 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:35:44,822 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:35:44,822 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:35:44,823 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-08-18 15:35:44,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ab9dda1b/d33480dfd39249e985f06bf307dca36e/FLAGff4c6f1a6 [2020-08-18 15:35:45,353 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:35:45,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-08-18 15:35:45,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ab9dda1b/d33480dfd39249e985f06bf307dca36e/FLAGff4c6f1a6 [2020-08-18 15:35:45,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ab9dda1b/d33480dfd39249e985f06bf307dca36e [2020-08-18 15:35:45,737 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:35:45,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:35:45,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:35:45,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:35:45,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:35:45,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:35:45" (1/1) ... [2020-08-18 15:35:45,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba61646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:45, skipping insertion in model container [2020-08-18 15:35:45,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:35:45" (1/1) ... [2020-08-18 15:35:45,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:35:45,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:35:45,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:35:45,975 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:35:45,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:35:46,006 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:35:46,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:46 WrapperNode [2020-08-18 15:35:46,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:35:46,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:35:46,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:35:46,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:35:46,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:46" (1/1) ... [2020-08-18 15:35:46,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:46" (1/1) ... [2020-08-18 15:35:46,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:46" (1/1) ... [2020-08-18 15:35:46,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:46" (1/1) ... [2020-08-18 15:35:46,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:46" (1/1) ... [2020-08-18 15:35:46,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:46" (1/1) ... [2020-08-18 15:35:46,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:46" (1/1) ... [2020-08-18 15:35:46,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:35:46,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:35:46,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:35:46,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:35:46,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:35:46,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:35:46,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:35:46,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 15:35:46,185 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:35:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:35:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 15:35:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 15:35:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:35:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:35:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:35:46,358 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:35:46,358 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 15:35:46,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:35:46 BoogieIcfgContainer [2020-08-18 15:35:46,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:35:46,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:35:46,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:35:46,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:35:46,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:35:45" (1/3) ... [2020-08-18 15:35:46,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140c5704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:35:46, skipping insertion in model container [2020-08-18 15:35:46,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:46" (2/3) ... [2020-08-18 15:35:46,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140c5704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:35:46, skipping insertion in model container [2020-08-18 15:35:46,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:35:46" (3/3) ... [2020-08-18 15:35:46,371 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-08-18 15:35:46,381 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:35:46,388 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:35:46,407 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:35:46,433 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:35:46,434 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:35:46,434 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:35:46,434 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:35:46,434 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:35:46,434 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:35:46,434 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:35:46,435 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:35:46,461 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 15:35:46,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 15:35:46,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:46,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:46,470 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:46,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:46,482 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-08-18 15:35:46,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:46,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308649444] [2020-08-18 15:35:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:46,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:46,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308649444] [2020-08-18 15:35:46,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:35:46,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 15:35:46,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086855822] [2020-08-18 15:35:46,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 15:35:46,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:46,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 15:35:46,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 15:35:46,661 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-18 15:35:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:46,682 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-18 15:35:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 15:35:46,683 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 15:35:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:46,692 INFO L225 Difference]: With dead ends: 30 [2020-08-18 15:35:46,692 INFO L226 Difference]: Without dead ends: 13 [2020-08-18 15:35:46,696 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 [2020-08-18 15:35:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-18 15:35:46,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-18 15:35:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-18 15:35:46,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-18 15:35:46,735 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-18 15:35:46,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:46,736 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-18 15:35:46,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 15:35:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-18 15:35:46,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 15:35:46,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:46,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:46,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:35:46,738 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:46,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:46,739 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-08-18 15:35:46,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:46,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796712441] [2020-08-18 15:35:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:46,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:46,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796712441] [2020-08-18 15:35:46,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:35:46,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:35:46,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539843614] [2020-08-18 15:35:46,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:35:46,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:46,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:35:46,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:35:46,835 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-08-18 15:35:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:46,876 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-08-18 15:35:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:35:46,877 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 15:35:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:46,879 INFO L225 Difference]: With dead ends: 21 [2020-08-18 15:35:46,879 INFO L226 Difference]: Without dead ends: 16 [2020-08-18 15:35:46,880 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 [2020-08-18 15:35:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-18 15:35:46,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-18 15:35:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-18 15:35:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-18 15:35:46,886 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-08-18 15:35:46,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:46,887 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-18 15:35:46,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:35:46,887 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-18 15:35:46,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 15:35:46,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:46,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:46,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:35:46,889 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:46,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-08-18 15:35:46,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:46,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827076665] [2020-08-18 15:35:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:47,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:47,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827076665] [2020-08-18 15:35:47,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:47,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:35:47,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419531282] [2020-08-18 15:35:47,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:35:47,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:47,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:35:47,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:35:47,183 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2020-08-18 15:35:47,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:47,292 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-18 15:35:47,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:35:47,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-08-18 15:35:47,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:47,295 INFO L225 Difference]: With dead ends: 28 [2020-08-18 15:35:47,295 INFO L226 Difference]: Without dead ends: 23 [2020-08-18 15:35:47,296 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 [2020-08-18 15:35:47,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-18 15:35:47,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-08-18 15:35:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 15:35:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-08-18 15:35:47,303 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-08-18 15:35:47,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:47,303 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-08-18 15:35:47,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:35:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-08-18 15:35:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 15:35:47,304 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:47,305 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:47,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:35:47,305 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:47,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-08-18 15:35:47,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:47,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391406049] [2020-08-18 15:35:47,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:47,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 15:35:47,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391406049] [2020-08-18 15:35:47,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:35:47,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:35:47,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860365997] [2020-08-18 15:35:47,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:35:47,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:47,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:35:47,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:35:47,337 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-08-18 15:35:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:47,354 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-18 15:35:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:35:47,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 15:35:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:47,356 INFO L225 Difference]: With dead ends: 28 [2020-08-18 15:35:47,356 INFO L226 Difference]: Without dead ends: 17 [2020-08-18 15:35:47,357 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 [2020-08-18 15:35:47,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-18 15:35:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-18 15:35:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-18 15:35:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-08-18 15:35:47,362 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2020-08-18 15:35:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:47,363 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-08-18 15:35:47,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:35:47,363 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-08-18 15:35:47,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 15:35:47,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:47,364 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:47,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:35:47,365 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:47,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:47,365 INFO L82 PathProgramCache]: Analyzing trace with hash 57842105, now seen corresponding path program 2 times [2020-08-18 15:35:47,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:47,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352541664] [2020-08-18 15:35:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:47,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:47,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352541664] [2020-08-18 15:35:47,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:47,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 15:35:47,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107183558] [2020-08-18 15:35:47,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 15:35:47,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:47,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 15:35:47,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:35:47,417 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-08-18 15:35:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:47,444 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-08-18 15:35:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 15:35:47,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-18 15:35:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:47,446 INFO L225 Difference]: With dead ends: 27 [2020-08-18 15:35:47,446 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 15:35:47,446 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 [2020-08-18 15:35:47,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 15:35:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-08-18 15:35:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 15:35:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 15:35:47,453 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-08-18 15:35:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:47,453 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 15:35:47,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 15:35:47,454 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 15:35:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 15:35:47,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:47,455 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:47,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:35:47,456 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-08-18 15:35:47,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:47,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750759437] [2020-08-18 15:35:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:47,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 15:35:47,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750759437] [2020-08-18 15:35:47,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:47,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:35:47,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103432637] [2020-08-18 15:35:47,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:35:47,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:47,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:35:47,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:35:47,667 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-08-18 15:35:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:47,843 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-08-18 15:35:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:35:47,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-08-18 15:35:47,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:47,845 INFO L225 Difference]: With dead ends: 27 [2020-08-18 15:35:47,845 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 15:35:47,846 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 [2020-08-18 15:35:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 15:35:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-18 15:35:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 15:35:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-08-18 15:35:47,851 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-08-18 15:35:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:47,852 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-08-18 15:35:47,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:35:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-08-18 15:35:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 15:35:47,853 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:47,853 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:47,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:35:47,854 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:47,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:47,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 3 times [2020-08-18 15:35:47,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:47,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131396209] [2020-08-18 15:35:47,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:47,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:47,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131396209] [2020-08-18 15:35:47,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:47,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 15:35:47,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193675773] [2020-08-18 15:35:47,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:35:47,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:47,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:35:47,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:35:47,898 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-08-18 15:35:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:47,929 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-18 15:35:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:35:47,930 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-18 15:35:47,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:47,931 INFO L225 Difference]: With dead ends: 33 [2020-08-18 15:35:47,931 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 15:35:47,932 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 [2020-08-18 15:35:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 15:35:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-18 15:35:47,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 15:35:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-18 15:35:47,938 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-08-18 15:35:47,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:47,938 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-18 15:35:47,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:35:47,939 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-18 15:35:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 15:35:47,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:47,940 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:47,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:35:47,940 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:47,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:47,941 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 4 times [2020-08-18 15:35:47,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:47,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347841164] [2020-08-18 15:35:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:47,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:47,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347841164] [2020-08-18 15:35:47,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:47,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 15:35:47,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293428812] [2020-08-18 15:35:47,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 15:35:47,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:47,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 15:35:47,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:35:47,994 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-08-18 15:35:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:48,028 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-18 15:35:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 15:35:48,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-18 15:35:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:48,029 INFO L225 Difference]: With dead ends: 36 [2020-08-18 15:35:48,030 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 15:35:48,030 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 [2020-08-18 15:35:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 15:35:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-18 15:35:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 15:35:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-18 15:35:48,035 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-08-18 15:35:48,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:48,036 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-18 15:35:48,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 15:35:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-18 15:35:48,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 15:35:48,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:48,037 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:48,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:35:48,038 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:48,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 5 times [2020-08-18 15:35:48,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:48,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605798198] [2020-08-18 15:35:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:48,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605798198] [2020-08-18 15:35:48,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:48,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:35:48,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894071809] [2020-08-18 15:35:48,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:35:48,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:48,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:35:48,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:35:48,097 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-08-18 15:35:48,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:48,136 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-18 15:35:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 15:35:48,136 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 15:35:48,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:48,137 INFO L225 Difference]: With dead ends: 39 [2020-08-18 15:35:48,137 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 15:35:48,138 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 [2020-08-18 15:35:48,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 15:35:48,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-08-18 15:35:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 15:35:48,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-18 15:35:48,144 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-08-18 15:35:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:48,144 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-18 15:35:48,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:35:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-18 15:35:48,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 15:35:48,145 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:48,145 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:48,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:35:48,146 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:48,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:48,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 6 times [2020-08-18 15:35:48,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:48,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978101233] [2020-08-18 15:35:48,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:48,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978101233] [2020-08-18 15:35:48,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:48,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:35:48,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369782893] [2020-08-18 15:35:48,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:35:48,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:48,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:35:48,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:35:48,214 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-08-18 15:35:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:48,263 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-18 15:35:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 15:35:48,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-18 15:35:48,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:48,265 INFO L225 Difference]: With dead ends: 42 [2020-08-18 15:35:48,265 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 15:35:48,266 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 [2020-08-18 15:35:48,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 15:35:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-18 15:35:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 15:35:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-18 15:35:48,271 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-08-18 15:35:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:48,272 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-18 15:35:48,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:35:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-18 15:35:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 15:35:48,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:48,274 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:48,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:35:48,274 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:48,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 7 times [2020-08-18 15:35:48,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:48,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958848806] [2020-08-18 15:35:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:48,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958848806] [2020-08-18 15:35:48,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:48,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:35:48,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673842383] [2020-08-18 15:35:48,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:35:48,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:48,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:35:48,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:35:48,361 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-08-18 15:35:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:48,414 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-08-18 15:35:48,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:35:48,415 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-18 15:35:48,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:48,416 INFO L225 Difference]: With dead ends: 45 [2020-08-18 15:35:48,416 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 15:35:48,417 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 [2020-08-18 15:35:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 15:35:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-18 15:35:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 15:35:48,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-18 15:35:48,423 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-08-18 15:35:48,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:48,423 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-18 15:35:48,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:35:48,423 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-18 15:35:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 15:35:48,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:48,432 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:48,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 15:35:48,433 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:48,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:48,434 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 8 times [2020-08-18 15:35:48,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:48,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432776071] [2020-08-18 15:35:48,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:48,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432776071] [2020-08-18 15:35:48,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:48,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:35:48,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475685975] [2020-08-18 15:35:48,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:35:48,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:48,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:35:48,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:35:48,557 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-08-18 15:35:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:48,606 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-08-18 15:35:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 15:35:48,606 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-08-18 15:35:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:48,607 INFO L225 Difference]: With dead ends: 48 [2020-08-18 15:35:48,607 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 15:35:48,608 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 [2020-08-18 15:35:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 15:35:48,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-18 15:35:48,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 15:35:48,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-18 15:35:48,613 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-08-18 15:35:48,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:48,613 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-18 15:35:48,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:35:48,614 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-18 15:35:48,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 15:35:48,614 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:48,615 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:48,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 15:35:48,615 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:48,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:48,615 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 9 times [2020-08-18 15:35:48,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:48,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928099316] [2020-08-18 15:35:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:48,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928099316] [2020-08-18 15:35:48,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:48,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 15:35:48,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141997340] [2020-08-18 15:35:48,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 15:35:48,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:48,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 15:35:48,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:35:48,716 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-08-18 15:35:48,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:48,787 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-08-18 15:35:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:35:48,788 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-08-18 15:35:48,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:48,790 INFO L225 Difference]: With dead ends: 51 [2020-08-18 15:35:48,791 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 15:35:48,791 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 [2020-08-18 15:35:48,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 15:35:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-08-18 15:35:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 15:35:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-18 15:35:48,802 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-08-18 15:35:48,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:48,802 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-18 15:35:48,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 15:35:48,803 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-18 15:35:48,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 15:35:48,804 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:48,804 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:48,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 15:35:48,804 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:48,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 10 times [2020-08-18 15:35:48,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:48,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720913966] [2020-08-18 15:35:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 15:35:48,827 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 15:35:48,827 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 15:35:48,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 15:35:48,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:35:48 BoogieIcfgContainer [2020-08-18 15:35:48,851 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:35:48,854 INFO L168 Benchmark]: Toolchain (without parser) took 3114.81 ms. Allocated memory was 141.6 MB in the beginning and 242.2 MB in the end (delta: 100.7 MB). Free memory was 105.2 MB in the beginning and 163.9 MB in the end (delta: -58.7 MB). Peak memory consumption was 41.9 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:48,855 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 15:35:48,856 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.51 ms. Allocated memory is still 141.6 MB. Free memory was 105.0 MB in the beginning and 95.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:48,856 INFO L168 Benchmark]: Boogie Preprocessor took 108.63 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 95.6 MB in the beginning and 184.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:48,857 INFO L168 Benchmark]: RCFGBuilder took 245.29 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 171.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:48,858 INFO L168 Benchmark]: TraceAbstraction took 2488.28 ms. Allocated memory was 203.9 MB in the beginning and 242.2 MB in the end (delta: 38.3 MB). Free memory was 170.4 MB in the beginning and 163.9 MB in the end (delta: 6.4 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:48,861 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.51 ms. Allocated memory is still 141.6 MB. Free memory was 105.0 MB in the beginning and 95.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.63 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 95.6 MB in the beginning and 184.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 245.29 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 171.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2488.28 ms. Allocated memory was 203.9 MB in the beginning and 242.2 MB in the end (delta: 38.3 MB). Free memory was 170.4 MB in the beginning and 163.9 MB in the end (delta: 6.4 MB). Peak memory consumption was 44.7 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: 2.4s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 0.7s, 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, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s 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: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 12 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s 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...