/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:29:32,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:29:32,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:29:32,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:29:32,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:29:32,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:29:32,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:29:32,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:29:32,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:29:32,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:29:32,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:29:32,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:29:32,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:29:32,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:29:32,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:29:32,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:29:32,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:29:32,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:29:32,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:29:32,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:29:32,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:29:32,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:29:32,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:29:32,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:29:32,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 21:29:32,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:29:32,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:29:32,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:29:32,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:29:32,983 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:29:32,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:29:32,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:29:32,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:29:32,987 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:29:32,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:29:32,988 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:29:32,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:29:32,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:29:32,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:29:32,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:29:32,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:29:32,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:29:32,989 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:29:32,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:29:32,989 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:29:32,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:29:32,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:29:32,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:29:32,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:29:32,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:29:32,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:29:32,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:29:32,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:29:32,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:29:32,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:29:32,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:29:32,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:29:32,994 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:29:32,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:29:33,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:29:33,313 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:29:33,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:29:33,318 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:29:33,318 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:29:33,319 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-21 21:29:33,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc4551ce8/7e6499ecd8844a028c5fd1d2190cae58/FLAG3a96a4182 [2020-08-21 21:29:33,858 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:29:33,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-21 21:29:33,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc4551ce8/7e6499ecd8844a028c5fd1d2190cae58/FLAG3a96a4182 [2020-08-21 21:29:34,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc4551ce8/7e6499ecd8844a028c5fd1d2190cae58 [2020-08-21 21:29:34,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:29:34,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:29:34,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:29:34,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:29:34,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:29:34,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:29:34" (1/1) ... [2020-08-21 21:29:34,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d98017f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:34, skipping insertion in model container [2020-08-21 21:29:34,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:29:34" (1/1) ... [2020-08-21 21:29:34,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:29:34,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:29:34,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:29:34,532 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:29:34,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:29:34,557 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:29:34,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:34 WrapperNode [2020-08-21 21:29:34,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:29:34,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:29:34,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:29:34,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:29:34,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:34" (1/1) ... [2020-08-21 21:29:34,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:34" (1/1) ... [2020-08-21 21:29:34,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:34" (1/1) ... [2020-08-21 21:29:34,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:34" (1/1) ... [2020-08-21 21:29:34,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:34" (1/1) ... [2020-08-21 21:29:34,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:34" (1/1) ... [2020-08-21 21:29:34,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:34" (1/1) ... [2020-08-21 21:29:34,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:29:34,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:29:34,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:29:34,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:29:34,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:29:34,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:29:34,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:29:34,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 21:29:34,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:29:34,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:29:34,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 21:29:34,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 21:29:34,734 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:29:34,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:29:34,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:29:35,017 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:29:35,017 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 21:29:35,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:29:35 BoogieIcfgContainer [2020-08-21 21:29:35,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:29:35,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:29:35,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:29:35,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:29:35,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:29:34" (1/3) ... [2020-08-21 21:29:35,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52394f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:29:35, skipping insertion in model container [2020-08-21 21:29:35,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:34" (2/3) ... [2020-08-21 21:29:35,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52394f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:29:35, skipping insertion in model container [2020-08-21 21:29:35,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:29:35" (3/3) ... [2020-08-21 21:29:35,051 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-21 21:29:35,083 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:29:35,099 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:29:35,127 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:29:35,149 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:29:35,149 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:29:35,149 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:29:35,149 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:29:35,150 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:29:35,150 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:29:35,150 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:29:35,150 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:29:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 21:29:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 21:29:35,177 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:35,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:35,178 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:35,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:35,183 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-21 21:29:35,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:35,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345843505] [2020-08-21 21:29:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:35,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345843505] [2020-08-21 21:29:35,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:35,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 21:29:35,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40072000] [2020-08-21 21:29:35,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 21:29:35,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:35,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 21:29:35,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 21:29:35,346 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-21 21:29:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:35,366 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-21 21:29:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 21:29:35,368 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 21:29:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:35,375 INFO L225 Difference]: With dead ends: 31 [2020-08-21 21:29:35,376 INFO L226 Difference]: Without dead ends: 14 [2020-08-21 21:29:35,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 21:29:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-21 21:29:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-21 21:29:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-21 21:29:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-21 21:29:35,417 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-21 21:29:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:35,417 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-21 21:29:35,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 21:29:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-21 21:29:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 21:29:35,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:35,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:35,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:29:35,419 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:35,420 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-21 21:29:35,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:35,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290064468] [2020-08-21 21:29:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:35,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290064468] [2020-08-21 21:29:35,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:35,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:29:35,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523562745] [2020-08-21 21:29:35,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:29:35,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:29:35,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:29:35,521 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-21 21:29:35,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:35,572 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-21 21:29:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:29:35,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-21 21:29:35,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:35,574 INFO L225 Difference]: With dead ends: 23 [2020-08-21 21:29:35,574 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 21:29:35,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:29:35,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 21:29:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 21:29:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 21:29:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-21 21:29:35,582 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-21 21:29:35,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:35,582 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-21 21:29:35,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:29:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-21 21:29:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 21:29:35,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:35,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:35,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:29:35,584 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:35,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-21 21:29:35,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:35,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537379176] [2020-08-21 21:29:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:35,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537379176] [2020-08-21 21:29:35,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:35,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:29:35,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127154658] [2020-08-21 21:29:35,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:29:35,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:35,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:29:35,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:29:35,875 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-21 21:29:35,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:35,992 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-21 21:29:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:29:35,992 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-21 21:29:35,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:35,995 INFO L225 Difference]: With dead ends: 33 [2020-08-21 21:29:35,996 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 21:29:35,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:29:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 21:29:36,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-21 21:29:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 21:29:36,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-21 21:29:36,005 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-21 21:29:36,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:36,005 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-21 21:29:36,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:29:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-21 21:29:36,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 21:29:36,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:36,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:36,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:29:36,007 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:36,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:36,008 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-21 21:29:36,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:36,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430147762] [2020-08-21 21:29:36,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:36,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 21:29:36,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430147762] [2020-08-21 21:29:36,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:36,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:29:36,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443620033] [2020-08-21 21:29:36,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:29:36,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:36,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:29:36,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:29:36,070 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-21 21:29:36,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:36,097 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-21 21:29:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:29:36,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 21:29:36,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:36,099 INFO L225 Difference]: With dead ends: 32 [2020-08-21 21:29:36,099 INFO L226 Difference]: Without dead ends: 19 [2020-08-21 21:29:36,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:29:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-21 21:29:36,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-21 21:29:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 21:29:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-21 21:29:36,105 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-21 21:29:36,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:36,106 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-21 21:29:36,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:29:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-21 21:29:36,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 21:29:36,107 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:36,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:36,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:29:36,108 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:36,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-21 21:29:36,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:36,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822793909] [2020-08-21 21:29:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:36,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:36,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822793909] [2020-08-21 21:29:36,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:36,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 21:29:36,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651219206] [2020-08-21 21:29:36,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:29:36,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:36,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:29:36,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:29:36,167 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-21 21:29:36,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:36,214 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 21:29:36,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:29:36,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-21 21:29:36,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:36,216 INFO L225 Difference]: With dead ends: 30 [2020-08-21 21:29:36,216 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 21:29:36,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:29:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 21:29:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-21 21:29:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 21:29:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-21 21:29:36,222 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-21 21:29:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:36,223 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-21 21:29:36,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:29:36,223 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-21 21:29:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 21:29:36,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:36,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:36,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:29:36,225 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:36,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:36,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-21 21:29:36,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:36,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990009102] [2020-08-21 21:29:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:36,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:29:36,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990009102] [2020-08-21 21:29:36,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:36,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:29:36,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468769411] [2020-08-21 21:29:36,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:29:36,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:36,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:29:36,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:29:36,426 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-21 21:29:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:36,577 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-21 21:29:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:29:36,578 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-21 21:29:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:36,579 INFO L225 Difference]: With dead ends: 31 [2020-08-21 21:29:36,579 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 21:29:36,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:29:36,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 21:29:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-21 21:29:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 21:29:36,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-21 21:29:36,585 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-21 21:29:36,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:36,585 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-21 21:29:36,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:29:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-21 21:29:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 21:29:36,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:36,587 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:36,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:29:36,587 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:36,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:36,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-21 21:29:36,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:36,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137270992] [2020-08-21 21:29:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:36,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:36,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137270992] [2020-08-21 21:29:36,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:36,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:29:36,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914976109] [2020-08-21 21:29:36,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:29:36,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:36,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:29:36,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:29:36,662 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-21 21:29:36,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:36,707 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-21 21:29:36,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:29:36,708 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-21 21:29:36,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:36,709 INFO L225 Difference]: With dead ends: 38 [2020-08-21 21:29:36,709 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 21:29:36,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:29:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 21:29:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-21 21:29:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 21:29:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-21 21:29:36,716 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-21 21:29:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:36,716 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-21 21:29:36,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:29:36,717 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-21 21:29:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 21:29:36,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:36,718 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:36,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:29:36,719 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:36,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-21 21:29:36,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:36,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902733452] [2020-08-21 21:29:36,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:36,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:36,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902733452] [2020-08-21 21:29:36,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:36,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:29:36,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225280574] [2020-08-21 21:29:36,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:29:36,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:36,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:29:36,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:29:36,816 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-21 21:29:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:36,881 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-21 21:29:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:29:36,882 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-21 21:29:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:36,883 INFO L225 Difference]: With dead ends: 42 [2020-08-21 21:29:36,883 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 21:29:36,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:29:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 21:29:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-21 21:29:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 21:29:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-21 21:29:36,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-21 21:29:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:36,891 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-21 21:29:36,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:29:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-21 21:29:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 21:29:36,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:36,892 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:36,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:29:36,893 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-21 21:29:36,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:36,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747336650] [2020-08-21 21:29:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:37,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:37,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747336650] [2020-08-21 21:29:37,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:37,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 21:29:37,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034877386] [2020-08-21 21:29:37,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 21:29:37,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:37,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 21:29:37,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:29:37,018 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-21 21:29:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:37,090 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-21 21:29:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:29:37,091 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-21 21:29:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:37,092 INFO L225 Difference]: With dead ends: 46 [2020-08-21 21:29:37,092 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 21:29:37,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:29:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 21:29:37,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-21 21:29:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 21:29:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-21 21:29:37,099 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-21 21:29:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:37,100 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-21 21:29:37,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 21:29:37,100 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-21 21:29:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 21:29:37,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:37,102 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:37,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:29:37,102 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:37,103 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-21 21:29:37,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:37,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503272264] [2020-08-21 21:29:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:29:37,122 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:29:37,122 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:29:37,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:29:37,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:29:37 BoogieIcfgContainer [2020-08-21 21:29:37,143 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:29:37,146 INFO L168 Benchmark]: Toolchain (without parser) took 2870.70 ms. Allocated memory was 140.5 MB in the beginning and 233.8 MB in the end (delta: 93.3 MB). Free memory was 103.7 MB in the beginning and 94.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 102.7 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:37,147 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 21:29:37,148 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.45 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:37,149 INFO L168 Benchmark]: Boogie Preprocessor took 110.62 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 94.0 MB in the beginning and 181.4 MB in the end (delta: -87.5 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:37,150 INFO L168 Benchmark]: RCFGBuilder took 360.92 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 168.8 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:37,151 INFO L168 Benchmark]: TraceAbstraction took 2111.32 ms. Allocated memory was 202.4 MB in the beginning and 233.8 MB in the end (delta: 31.5 MB). Free memory was 168.1 MB in the beginning and 94.4 MB in the end (delta: 73.7 MB). Peak memory consumption was 105.2 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:37,154 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.45 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.62 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 94.0 MB in the beginning and 181.4 MB in the end (delta: -87.5 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 360.92 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 168.8 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2111.32 ms. Allocated memory was 202.4 MB in the beginning and 233.8 MB in the end (delta: 31.5 MB). Free memory was 168.1 MB in the beginning and 94.4 MB in the end (delta: 73.7 MB). Peak memory consumption was 105.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i