/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -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 [2020-08-19 06:56:03,994 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 06:56:04,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:56:04,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:56:04,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:56:04,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:56:04,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:56:04,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:56:04,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:56:04,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:56:04,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:56:04,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:56:04,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:56:04,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:56:04,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:56:04,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:56:04,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:56:04,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:56:04,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:56:04,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:56:04,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:56:04,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:56:04,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:56:04,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:56:04,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:56:04,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:56:04,067 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 [2020-08-19 06:56:04,120 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:56:04,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:56:04,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:56:04,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:56:04,126 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:56:04,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:56:04,126 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:56:04,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:56:04,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:56:04,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:56:04,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:56:04,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:56:04,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:56:04,127 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:56:04,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:56:04,131 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:56:04,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:56:04,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:56:04,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:56:04,132 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:56:04,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:56:04,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:56:04,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:56:04,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:56:04,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:56:04,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:56:04,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:56:04,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:56:04,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:56:04,134 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=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:56:04,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:56:04,478 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:56:04,486 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:56:04,487 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:56:04,488 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:56:04,488 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-19 06:56:04,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eeaa45a18/d272466ddee0480f8601853d1d6df2c0/FLAGb5cf4e223 [2020-08-19 06:56:05,022 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:56:05,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-19 06:56:05,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eeaa45a18/d272466ddee0480f8601853d1d6df2c0/FLAGb5cf4e223 [2020-08-19 06:56:05,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eeaa45a18/d272466ddee0480f8601853d1d6df2c0 [2020-08-19 06:56:05,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:56:05,415 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:56:05,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:56:05,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:56:05,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:56:05,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:56:05" (1/1) ... [2020-08-19 06:56:05,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb34a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:05, skipping insertion in model container [2020-08-19 06:56:05,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:56:05" (1/1) ... [2020-08-19 06:56:05,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:56:05,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:56:05,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:56:05,665 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:56:05,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:56:05,692 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:56:05,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:05 WrapperNode [2020-08-19 06:56:05,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:56:05,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:56:05,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:56:05,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:56:05,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:05" (1/1) ... [2020-08-19 06:56:05,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:05" (1/1) ... [2020-08-19 06:56:05,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:05" (1/1) ... [2020-08-19 06:56:05,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:05" (1/1) ... [2020-08-19 06:56:05,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:05" (1/1) ... [2020-08-19 06:56:05,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:05" (1/1) ... [2020-08-19 06:56:05,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:05" (1/1) ... [2020-08-19 06:56:05,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:56:05,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:56:05,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:56:05,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:56:05,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:05" (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 [2020-08-19 06:56:05,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:56:05,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:56:05,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 06:56:05,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:56:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:56:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 06:56:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 06:56:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:56:05,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:56:05,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:56:06,075 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:56:06,079 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 06:56:06,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:56:06 BoogieIcfgContainer [2020-08-19 06:56:06,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:56:06,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:56:06,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:56:06,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:56:06,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:56:05" (1/3) ... [2020-08-19 06:56:06,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3140ee77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:56:06, skipping insertion in model container [2020-08-19 06:56:06,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:05" (2/3) ... [2020-08-19 06:56:06,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3140ee77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:56:06, skipping insertion in model container [2020-08-19 06:56:06,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:56:06" (3/3) ... [2020-08-19 06:56:06,115 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-19 06:56:06,143 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:56:06,151 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:56:06,168 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:56:06,198 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:56:06,198 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:56:06,198 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:56:06,198 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:56:06,198 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:56:06,199 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:56:06,199 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:56:06,199 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:56:06,213 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-19 06:56:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-19 06:56:06,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:06,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:06,219 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:06,224 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-19 06:56:06,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:06,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616428715] [2020-08-19 06:56:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:06,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:06,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616428715] [2020-08-19 06:56:06,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:06,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-19 06:56:06,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633489555] [2020-08-19 06:56:06,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-19 06:56:06,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:06,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-19 06:56:06,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-19 06:56:06,404 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-19 06:56:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:06,429 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-19 06:56:06,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-19 06:56:06,430 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-19 06:56:06,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:06,439 INFO L225 Difference]: With dead ends: 31 [2020-08-19 06:56:06,439 INFO L226 Difference]: Without dead ends: 14 [2020-08-19 06:56:06,442 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 [2020-08-19 06:56:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-19 06:56:06,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-19 06:56:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-19 06:56:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-19 06:56:06,472 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-19 06:56:06,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:06,472 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-19 06:56:06,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-19 06:56:06,473 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-19 06:56:06,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-19 06:56:06,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:06,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:06,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:56:06,475 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:06,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:06,475 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-19 06:56:06,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:06,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019162137] [2020-08-19 06:56:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:06,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:06,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019162137] [2020-08-19 06:56:06,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:06,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:56:06,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609259986] [2020-08-19 06:56:06,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:56:06,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:06,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:56:06,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:56:06,580 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-19 06:56:06,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:06,623 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-19 06:56:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:56:06,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-19 06:56:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:06,625 INFO L225 Difference]: With dead ends: 23 [2020-08-19 06:56:06,625 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 06:56:06,627 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 [2020-08-19 06:56:06,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 06:56:06,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 06:56:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 06:56:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-19 06:56:06,632 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-19 06:56:06,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:06,633 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-19 06:56:06,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:56:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-19 06:56:06,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 06:56:06,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:06,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:06,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:56:06,635 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:06,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:06,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-19 06:56:06,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:06,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227425055] [2020-08-19 06:56:06,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:06,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:06,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227425055] [2020-08-19 06:56:06,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:06,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:56:06,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190738051] [2020-08-19 06:56:06,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:56:06,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:06,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:56:06,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:56:06,935 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-19 06:56:07,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:07,072 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-19 06:56:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:56:07,073 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-19 06:56:07,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:07,076 INFO L225 Difference]: With dead ends: 33 [2020-08-19 06:56:07,076 INFO L226 Difference]: Without dead ends: 28 [2020-08-19 06:56:07,077 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 [2020-08-19 06:56:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-19 06:56:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-19 06:56:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-19 06:56:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-19 06:56:07,084 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-19 06:56:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:07,085 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-19 06:56:07,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:56:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-19 06:56:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:56:07,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:07,087 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:07,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:56:07,087 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:07,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:07,088 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-19 06:56:07,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:07,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695814762] [2020-08-19 06:56:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:07,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-19 06:56:07,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695814762] [2020-08-19 06:56:07,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:07,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:56:07,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18348809] [2020-08-19 06:56:07,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:56:07,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:07,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:56:07,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:56:07,125 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-19 06:56:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:07,146 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-19 06:56:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:56:07,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 06:56:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:07,148 INFO L225 Difference]: With dead ends: 32 [2020-08-19 06:56:07,148 INFO L226 Difference]: Without dead ends: 19 [2020-08-19 06:56:07,149 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 [2020-08-19 06:56:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-19 06:56:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-19 06:56:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-19 06:56:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-19 06:56:07,155 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-19 06:56:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:07,155 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-19 06:56:07,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:56:07,156 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-19 06:56:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:56:07,157 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:07,157 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:07,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:56:07,158 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:07,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:07,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-19 06:56:07,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:07,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495133789] [2020-08-19 06:56:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:07,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:07,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495133789] [2020-08-19 06:56:07,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:07,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 06:56:07,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142259815] [2020-08-19 06:56:07,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:56:07,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:07,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:56:07,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:56:07,248 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-19 06:56:07,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:07,306 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-19 06:56:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:56:07,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-19 06:56:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:07,308 INFO L225 Difference]: With dead ends: 30 [2020-08-19 06:56:07,308 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 06:56:07,309 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 [2020-08-19 06:56:07,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 06:56:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-19 06:56:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-19 06:56:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-19 06:56:07,314 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-19 06:56:07,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:07,315 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-19 06:56:07,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:56:07,315 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-19 06:56:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:56:07,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:07,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:07,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:56:07,316 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:07,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-19 06:56:07,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:07,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852725020] [2020-08-19 06:56:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:07,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 06:56:07,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852725020] [2020-08-19 06:56:07,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:07,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:56:07,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252991317] [2020-08-19 06:56:07,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:56:07,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:07,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:56:07,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:56:07,531 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-19 06:56:07,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:07,727 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-19 06:56:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:56:07,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-19 06:56:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:07,730 INFO L225 Difference]: With dead ends: 31 [2020-08-19 06:56:07,730 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 06:56:07,731 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 [2020-08-19 06:56:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 06:56:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-19 06:56:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 06:56:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-19 06:56:07,744 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-19 06:56:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:07,748 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-19 06:56:07,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:56:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-19 06:56:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:56:07,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:07,749 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:07,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:56:07,751 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:07,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-19 06:56:07,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:07,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987002900] [2020-08-19 06:56:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:07,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:07,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987002900] [2020-08-19 06:56:07,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:07,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:56:07,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659920879] [2020-08-19 06:56:07,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:56:07,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:07,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:56:07,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:56:07,836 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-19 06:56:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:07,873 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-19 06:56:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:56:07,874 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-19 06:56:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:07,875 INFO L225 Difference]: With dead ends: 38 [2020-08-19 06:56:07,875 INFO L226 Difference]: Without dead ends: 29 [2020-08-19 06:56:07,876 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 [2020-08-19 06:56:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-19 06:56:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-19 06:56:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-19 06:56:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-19 06:56:07,882 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-19 06:56:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:07,882 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-19 06:56:07,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:56:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-19 06:56:07,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 06:56:07,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:07,884 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:07,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:56:07,884 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:07,885 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-19 06:56:07,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:07,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289521105] [2020-08-19 06:56:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:07,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:07,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289521105] [2020-08-19 06:56:07,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:07,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:56:07,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143960150] [2020-08-19 06:56:07,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:56:07,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:07,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:56:07,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:56:07,971 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-19 06:56:08,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:08,037 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-19 06:56:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:56:08,038 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-19 06:56:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:08,039 INFO L225 Difference]: With dead ends: 42 [2020-08-19 06:56:08,039 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 06:56:08,040 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 [2020-08-19 06:56:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 06:56:08,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-19 06:56:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 06:56:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-19 06:56:08,045 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-19 06:56:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:08,046 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-19 06:56:08,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:56:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-19 06:56:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 06:56:08,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:08,047 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:08,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:56:08,048 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:08,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:08,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-19 06:56:08,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:08,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15643404] [2020-08-19 06:56:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:08,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:08,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15643404] [2020-08-19 06:56:08,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:08,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:56:08,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083422230] [2020-08-19 06:56:08,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:56:08,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:08,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:56:08,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:56:08,160 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-19 06:56:08,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:08,243 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-19 06:56:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:56:08,244 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-19 06:56:08,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:08,245 INFO L225 Difference]: With dead ends: 46 [2020-08-19 06:56:08,246 INFO L226 Difference]: Without dead ends: 37 [2020-08-19 06:56:08,246 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 [2020-08-19 06:56:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-19 06:56:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-19 06:56:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 06:56:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-19 06:56:08,253 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-19 06:56:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:08,254 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-19 06:56:08,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:56:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-19 06:56:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 06:56:08,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:08,256 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:08,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:56:08,256 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:08,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:08,257 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-19 06:56:08,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:08,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105247448] [2020-08-19 06:56:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 06:56:08,283 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 06:56:08,283 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 06:56:08,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:56:08,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:56:08 BoogieIcfgContainer [2020-08-19 06:56:08,323 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:56:08,326 INFO L168 Benchmark]: Toolchain (without parser) took 2910.47 ms. Allocated memory was 147.3 MB in the beginning and 233.8 MB in the end (delta: 86.5 MB). Free memory was 103.4 MB in the beginning and 93.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 96.1 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:08,328 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 06:56:08,328 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.10 ms. Allocated memory is still 147.3 MB. Free memory was 103.2 MB in the beginning and 93.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:08,329 INFO L168 Benchmark]: Boogie Preprocessor took 119.57 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.8 MB in the beginning and 181.7 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:08,336 INFO L168 Benchmark]: RCFGBuilder took 276.13 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 169.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:08,338 INFO L168 Benchmark]: TraceAbstraction took 2228.52 ms. Allocated memory was 202.9 MB in the beginning and 233.8 MB in the end (delta: 30.9 MB). Free memory was 168.5 MB in the beginning and 93.8 MB in the end (delta: 74.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:08,350 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 147.3 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.10 ms. Allocated memory is still 147.3 MB. Free memory was 103.2 MB in the beginning and 93.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.57 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.8 MB in the beginning and 181.7 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 276.13 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 169.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2228.52 ms. Allocated memory was 202.9 MB in the beginning and 233.8 MB in the end (delta: 30.9 MB). Free memory was 168.5 MB in the beginning and 93.8 MB in the end (delta: 74.7 MB). Peak memory consumption was 105.7 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