/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:23:57,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:23:57,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:23:57,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:23:57,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:23:57,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:23:57,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:23:57,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:23:57,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:23:57,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:23:57,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:23:57,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:23:57,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:23:57,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:23:57,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:23:57,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:23:57,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:23:57,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:23:57,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:23:57,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:23:57,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:23:57,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:23:57,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:23:57,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:23:57,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:23:57,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:23:57,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:23:57,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:23:57,317 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 16:23:57,341 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:23:57,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:23:57,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:23:57,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:23:57,343 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:23:57,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:23:57,343 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:23:57,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:23:57,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:23:57,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:23:57,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:23:57,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:23:57,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:23:57,345 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:23:57,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:23:57,345 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:23:57,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:23:57,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:23:57,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:23:57,346 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:23:57,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:23:57,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:23:57,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:23:57,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:23:57,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:23:57,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:23:57,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:23:57,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:23:57,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:23:57,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:23:57,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:23:57,652 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:23:57,655 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:23:57,657 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:23:57,657 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:23:57,658 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-18 16:23:57,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/031bd4d18/4a7c68ab150c4bdf87ce3c311c51bd5d/FLAG5f620b34c [2020-08-18 16:23:58,216 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:23:58,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-18 16:23:58,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/031bd4d18/4a7c68ab150c4bdf87ce3c311c51bd5d/FLAG5f620b34c [2020-08-18 16:23:58,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/031bd4d18/4a7c68ab150c4bdf87ce3c311c51bd5d [2020-08-18 16:23:58,657 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:23:58,659 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:23:58,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:58,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:23:58,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:23:58,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:58" (1/1) ... [2020-08-18 16:23:58,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd4ce29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:58, skipping insertion in model container [2020-08-18 16:23:58,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:58" (1/1) ... [2020-08-18 16:23:58,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:23:58,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:23:58,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:58,873 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:23:58,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:58,901 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:23:58,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:58 WrapperNode [2020-08-18 16:23:58,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:58,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:23:58,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:23:58,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:23:58,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:58" (1/1) ... [2020-08-18 16:23:58,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:58" (1/1) ... [2020-08-18 16:23:59,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:58" (1/1) ... [2020-08-18 16:23:59,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:58" (1/1) ... [2020-08-18 16:23:59,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:58" (1/1) ... [2020-08-18 16:23:59,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:58" (1/1) ... [2020-08-18 16:23:59,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:58" (1/1) ... [2020-08-18 16:23:59,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:23:59,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:23:59,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:23:59,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:23:59,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:23:59,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:23:59,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:23:59,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 16:23:59,094 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:23:59,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:23:59,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 16:23:59,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 16:23:59,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:23:59,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:23:59,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:23:59,302 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:23:59,302 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 16:23:59,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:59 BoogieIcfgContainer [2020-08-18 16:23:59,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:23:59,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:23:59,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:23:59,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:23:59,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:23:58" (1/3) ... [2020-08-18 16:23:59,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712bcc4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:59, skipping insertion in model container [2020-08-18 16:23:59,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:58" (2/3) ... [2020-08-18 16:23:59,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712bcc4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:59, skipping insertion in model container [2020-08-18 16:23:59,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:59" (3/3) ... [2020-08-18 16:23:59,315 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-18 16:23:59,325 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:23:59,333 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:23:59,361 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:23:59,401 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:23:59,401 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:23:59,402 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:23:59,402 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:23:59,402 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:23:59,402 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:23:59,403 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:23:59,403 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:23:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 16:23:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 16:23:59,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:59,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:23:59,440 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:59,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:59,448 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-18 16:23:59,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:59,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157546414] [2020-08-18 16:23:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:59,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:59,587 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 16:23:59,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157546414] [2020-08-18 16:23:59,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:23:59,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 16:23:59,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633899648] [2020-08-18 16:23:59,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 16:23:59,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:59,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 16:23:59,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 16:23:59,614 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-18 16:23:59,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:59,637 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-18 16:23:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 16:23:59,639 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 16:23:59,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:59,648 INFO L225 Difference]: With dead ends: 31 [2020-08-18 16:23:59,649 INFO L226 Difference]: Without dead ends: 14 [2020-08-18 16:23:59,652 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 16:23:59,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-18 16:23:59,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-18 16:23:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-18 16:23:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-18 16:23:59,693 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-18 16:23:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:59,694 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-18 16:23:59,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 16:23:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-18 16:23:59,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 16:23:59,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:59,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:23:59,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:23:59,696 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:59,697 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-18 16:23:59,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:59,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162055086] [2020-08-18 16:23:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:59,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:59,795 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 16:23:59,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162055086] [2020-08-18 16:23:59,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:23:59,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:23:59,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588333687] [2020-08-18 16:23:59,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:23:59,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:23:59,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:23:59,799 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-18 16:23:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:59,848 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-18 16:23:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:23:59,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 16:23:59,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:59,850 INFO L225 Difference]: With dead ends: 23 [2020-08-18 16:23:59,850 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 16:23:59,851 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 16:23:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 16:23:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 16:23:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 16:23:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-18 16:23:59,857 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-18 16:23:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:59,858 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-18 16:23:59,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:23:59,858 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-18 16:23:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 16:23:59,859 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:59,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:23:59,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:23:59,860 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:59,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-18 16:23:59,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:59,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235390605] [2020-08-18 16:23:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:00,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:24:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:00,181 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 16:24:00,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235390605] [2020-08-18 16:24:00,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:24:00,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 16:24:00,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054003333] [2020-08-18 16:24:00,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 16:24:00,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:24:00,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 16:24:00,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:24:00,187 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-18 16:24:00,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:24:00,329 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-18 16:24:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 16:24:00,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-18 16:24:00,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:24:00,333 INFO L225 Difference]: With dead ends: 33 [2020-08-18 16:24:00,333 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 16:24:00,334 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 16:24:00,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 16:24:00,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-18 16:24:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 16:24:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-18 16:24:00,347 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-18 16:24:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:24:00,348 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-18 16:24:00,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 16:24:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-18 16:24:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 16:24:00,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:24:00,349 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:24:00,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:24:00,350 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:24:00,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:24:00,350 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-18 16:24:00,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:24:00,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440827768] [2020-08-18 16:24:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:24:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:00,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:24:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 16:24:00,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440827768] [2020-08-18 16:24:00,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:24:00,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:24:00,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116649475] [2020-08-18 16:24:00,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:24:00,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:24:00,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:24:00,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:24:00,384 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-18 16:24:00,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:24:00,402 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 16:24:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:24:00,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 16:24:00,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:24:00,404 INFO L225 Difference]: With dead ends: 32 [2020-08-18 16:24:00,404 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 16:24:00,405 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 16:24:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 16:24:00,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-18 16:24:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-18 16:24:00,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-18 16:24:00,411 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-18 16:24:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:24:00,411 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-18 16:24:00,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:24:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-18 16:24:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 16:24:00,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:24:00,412 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:24:00,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:24:00,413 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:24:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:24:00,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-18 16:24:00,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:24:00,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152445990] [2020-08-18 16:24:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:24:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:00,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:24:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:24:00,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152445990] [2020-08-18 16:24:00,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:24:00,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 16:24:00,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923059521] [2020-08-18 16:24:00,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:24:00,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:24:00,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:24:00,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:24:00,467 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-18 16:24:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:24:00,513 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 16:24:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:24:00,514 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 16:24:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:24:00,515 INFO L225 Difference]: With dead ends: 30 [2020-08-18 16:24:00,515 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 16:24:00,516 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 16:24:00,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 16:24:00,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-18 16:24:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 16:24:00,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-18 16:24:00,521 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-18 16:24:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:24:00,522 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-18 16:24:00,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:24:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-18 16:24:00,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 16:24:00,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:24:00,523 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:24:00,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:24:00,524 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:24:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:24:00,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-18 16:24:00,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:24:00,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303774041] [2020-08-18 16:24:00,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:24:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:00,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:24:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 16:24:00,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303774041] [2020-08-18 16:24:00,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:24:00,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 16:24:00,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314901549] [2020-08-18 16:24:00,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 16:24:00,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:24:00,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 16:24:00,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 16:24:00,728 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-18 16:24:00,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:24:00,877 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-18 16:24:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 16:24:00,881 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-18 16:24:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:24:00,881 INFO L225 Difference]: With dead ends: 31 [2020-08-18 16:24:00,882 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 16:24:00,882 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 16:24:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 16:24:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-18 16:24:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 16:24:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-18 16:24:00,888 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-18 16:24:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:24:00,888 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-18 16:24:00,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 16:24:00,889 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-18 16:24:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:24:00,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:24:00,890 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:24:00,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:24:00,890 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:24:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:24:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-18 16:24:00,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:24:00,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330347047] [2020-08-18 16:24:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:24:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:00,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:24:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:24:00,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330347047] [2020-08-18 16:24:00,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:24:00,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 16:24:00,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774428164] [2020-08-18 16:24:00,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 16:24:00,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:24:00,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 16:24:00,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:24:00,962 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-18 16:24:00,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:24:00,998 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-18 16:24:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 16:24:00,999 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-18 16:24:00,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:24:01,000 INFO L225 Difference]: With dead ends: 38 [2020-08-18 16:24:01,000 INFO L226 Difference]: Without dead ends: 29 [2020-08-18 16:24:01,001 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 16:24:01,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-18 16:24:01,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-18 16:24:01,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 16:24:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-18 16:24:01,007 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-18 16:24:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:24:01,007 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-18 16:24:01,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 16:24:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-18 16:24:01,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 16:24:01,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:24:01,008 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:24:01,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:24:01,009 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:24:01,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:24:01,009 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-18 16:24:01,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:24:01,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722613039] [2020-08-18 16:24:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:24:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:01,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:24:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:24:01,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722613039] [2020-08-18 16:24:01,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:24:01,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 16:24:01,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749498582] [2020-08-18 16:24:01,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 16:24:01,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:24:01,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 16:24:01,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:24:01,096 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-18 16:24:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:24:01,148 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-18 16:24:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 16:24:01,149 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-18 16:24:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:24:01,150 INFO L225 Difference]: With dead ends: 42 [2020-08-18 16:24:01,150 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 16:24:01,150 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 16:24:01,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 16:24:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-18 16:24:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 16:24:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-18 16:24:01,156 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-18 16:24:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:24:01,157 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-18 16:24:01,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 16:24:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-18 16:24:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 16:24:01,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:24:01,158 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:24:01,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 16:24:01,158 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:24:01,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:24:01,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-18 16:24:01,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:24:01,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793023022] [2020-08-18 16:24:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:24:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:01,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:24:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:24:01,266 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:24:01,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793023022] [2020-08-18 16:24:01,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:24:01,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 16:24:01,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041565220] [2020-08-18 16:24:01,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 16:24:01,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:24:01,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 16:24:01,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:24:01,269 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-18 16:24:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:24:01,337 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-18 16:24:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 16:24:01,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-18 16:24:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:24:01,339 INFO L225 Difference]: With dead ends: 46 [2020-08-18 16:24:01,339 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 16:24:01,339 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 16:24:01,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 16:24:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-18 16:24:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 16:24:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-18 16:24:01,346 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-18 16:24:01,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:24:01,347 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-18 16:24:01,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 16:24:01,347 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-18 16:24:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 16:24:01,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:24:01,348 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:24:01,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 16:24:01,349 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:24:01,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:24:01,349 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-18 16:24:01,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:24:01,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235010859] [2020-08-18 16:24:01,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:24:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:24:01,371 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:24:01,371 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:24:01,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 16:24:01,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:24:01 BoogieIcfgContainer [2020-08-18 16:24:01,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:24:01,404 INFO L168 Benchmark]: Toolchain (without parser) took 2740.05 ms. Allocated memory was 140.0 MB in the beginning and 234.4 MB in the end (delta: 94.4 MB). Free memory was 101.7 MB in the beginning and 97.0 MB in the end (delta: 4.6 MB). Peak memory consumption was 99.0 MB. Max. memory is 7.1 GB. [2020-08-18 16:24:01,405 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 16:24:01,406 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.72 ms. Allocated memory is still 140.0 MB. Free memory was 101.5 MB in the beginning and 92.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:24:01,407 INFO L168 Benchmark]: Boogie Preprocessor took 120.19 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 182.0 MB in the end (delta: -89.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-18 16:24:01,408 INFO L168 Benchmark]: RCFGBuilder took 283.11 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 169.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:24:01,409 INFO L168 Benchmark]: TraceAbstraction took 2088.97 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 169.3 MB in the beginning and 97.0 MB in the end (delta: 72.3 MB). Peak memory consumption was 103.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:24:01,413 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.72 ms. Allocated memory is still 140.0 MB. Free memory was 101.5 MB in the beginning and 92.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.19 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 182.0 MB in the end (delta: -89.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 283.11 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 169.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2088.97 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 169.3 MB in the beginning and 97.0 MB in the end (delta: 72.3 MB). Peak memory consumption was 103.7 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, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i