/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:16:22,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:16:22,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:16:22,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-19 01:16:22,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:16:22,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:16:22,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:16:22,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:16:22,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:16:22,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:16:22,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:16:22,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:16:22,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:16:22,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:16:22,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:16:22,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:16:22,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 01:16:22,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:16:22,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:16:22,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:16:22,967 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 01:16:22,989 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:16:22,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:16:22,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:16:22,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:16:22,991 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:16:22,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:16:22,991 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:16:22,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:16:22,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:16:22,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:16:22,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:16:22,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:16:22,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:16:22,993 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:16:22,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:16:22,993 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:16:22,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:16:22,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:16:22,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:16:22,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:16:22,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:16:22,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:16:22,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:16:22,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:16:22,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:16:22,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:16:22,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:16:22,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:16:22,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:16:22,996 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=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:16:23,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:16:23,297 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:16:23,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:16:23,302 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:16:23,304 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:16:23,304 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-08-19 01:16:23,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/784ea5e08/22550cd8875a40f38d2c548b95c4b0ac/FLAGb6711834f [2020-08-19 01:16:23,766 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:16:23,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-08-19 01:16:23,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/784ea5e08/22550cd8875a40f38d2c548b95c4b0ac/FLAGb6711834f [2020-08-19 01:16:24,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/784ea5e08/22550cd8875a40f38d2c548b95c4b0ac [2020-08-19 01:16:24,211 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:16:24,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:16:24,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:16:24,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:16:24,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:16:24,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:16:24" (1/1) ... [2020-08-19 01:16:24,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ca24e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:24, skipping insertion in model container [2020-08-19 01:16:24,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:16:24" (1/1) ... [2020-08-19 01:16:24,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:16:24,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:16:24,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:16:24,419 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:16:24,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:16:24,451 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:16:24,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:24 WrapperNode [2020-08-19 01:16:24,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:16:24,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:16:24,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:16:24,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:16:24,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:24" (1/1) ... [2020-08-19 01:16:24,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:24" (1/1) ... [2020-08-19 01:16:24,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:24" (1/1) ... [2020-08-19 01:16:24,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:24" (1/1) ... [2020-08-19 01:16:24,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:24" (1/1) ... [2020-08-19 01:16:24,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:24" (1/1) ... [2020-08-19 01:16:24,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:24" (1/1) ... [2020-08-19 01:16:24,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:16:24,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:16:24,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:16:24,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:16:24,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:24" (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 01:16:24,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:16:24,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:16:24,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 01:16:24,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:16:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:16:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 01:16:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 01:16:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:16:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:16:24,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:16:24,847 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:16:24,848 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 01:16:24,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:16:24 BoogieIcfgContainer [2020-08-19 01:16:24,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:16:24,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:16:24,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:16:24,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:16:24,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:16:24" (1/3) ... [2020-08-19 01:16:24,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578adc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:16:24, skipping insertion in model container [2020-08-19 01:16:24,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:24" (2/3) ... [2020-08-19 01:16:24,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578adc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:16:24, skipping insertion in model container [2020-08-19 01:16:24,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:16:24" (3/3) ... [2020-08-19 01:16:24,861 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-08-19 01:16:24,872 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:16:24,880 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:16:24,896 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:16:24,965 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:16:24,966 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:16:24,967 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:16:24,967 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:16:24,967 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:16:24,967 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:16:24,967 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:16:24,968 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:16:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-19 01:16:25,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-19 01:16:25,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:25,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:25,026 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:25,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:25,032 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-08-19 01:16:25,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:25,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64949911] [2020-08-19 01:16:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:25,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:25,180 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 01:16:25,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64949911] [2020-08-19 01:16:25,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:16:25,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-19 01:16:25,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675266927] [2020-08-19 01:16:25,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-19 01:16:25,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:25,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-19 01:16:25,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-19 01:16:25,206 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-19 01:16:25,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:25,228 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-19 01:16:25,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-19 01:16:25,229 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-19 01:16:25,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:25,237 INFO L225 Difference]: With dead ends: 30 [2020-08-19 01:16:25,238 INFO L226 Difference]: Without dead ends: 13 [2020-08-19 01:16:25,241 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 01:16:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-19 01:16:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-19 01:16:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-19 01:16:25,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-19 01:16:25,274 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-19 01:16:25,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:25,274 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-19 01:16:25,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-19 01:16:25,275 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-19 01:16:25,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-19 01:16:25,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:25,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:25,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:16:25,276 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:25,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:25,277 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-08-19 01:16:25,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:25,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130414902] [2020-08-19 01:16:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:25,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:25,382 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 01:16:25,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130414902] [2020-08-19 01:16:25,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:16:25,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:16:25,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231790454] [2020-08-19 01:16:25,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:16:25,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:25,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:16:25,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:16:25,386 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-08-19 01:16:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:25,428 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-08-19 01:16:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:16:25,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-19 01:16:25,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:25,431 INFO L225 Difference]: With dead ends: 21 [2020-08-19 01:16:25,431 INFO L226 Difference]: Without dead ends: 16 [2020-08-19 01:16:25,432 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 01:16:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-19 01:16:25,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-19 01:16:25,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-19 01:16:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-19 01:16:25,439 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-08-19 01:16:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:25,439 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-19 01:16:25,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:16:25,440 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-19 01:16:25,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 01:16:25,441 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:25,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:25,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:16:25,441 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:25,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:25,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-08-19 01:16:25,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:25,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337396723] [2020-08-19 01:16:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:25,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:25,706 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 01:16:25,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337396723] [2020-08-19 01:16:25,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:16:25,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 01:16:25,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419733206] [2020-08-19 01:16:25,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 01:16:25,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:25,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 01:16:25,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:16:25,710 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2020-08-19 01:16:25,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:25,848 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-19 01:16:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 01:16:25,849 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-08-19 01:16:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:25,851 INFO L225 Difference]: With dead ends: 28 [2020-08-19 01:16:25,851 INFO L226 Difference]: Without dead ends: 23 [2020-08-19 01:16:25,852 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 01:16:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-19 01:16:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-08-19 01:16:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-19 01:16:25,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-08-19 01:16:25,859 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-08-19 01:16:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:25,860 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-08-19 01:16:25,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 01:16:25,860 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-08-19 01:16:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 01:16:25,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:25,861 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:25,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:16:25,862 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:25,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:25,862 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-08-19 01:16:25,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:25,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157534869] [2020-08-19 01:16:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:25,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 01:16:25,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157534869] [2020-08-19 01:16:25,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:16:25,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:16:25,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627694997] [2020-08-19 01:16:25,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:16:25,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:25,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:16:25,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:16:25,896 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-08-19 01:16:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:25,915 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-19 01:16:25,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:16:25,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-19 01:16:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:25,916 INFO L225 Difference]: With dead ends: 28 [2020-08-19 01:16:25,917 INFO L226 Difference]: Without dead ends: 17 [2020-08-19 01:16:25,917 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 01:16:25,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-19 01:16:25,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-19 01:16:25,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-19 01:16:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-08-19 01:16:25,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2020-08-19 01:16:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:25,923 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-08-19 01:16:25,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:16:25,924 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-08-19 01:16:25,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 01:16:25,924 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:25,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:25,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:16:25,925 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:25,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:25,926 INFO L82 PathProgramCache]: Analyzing trace with hash 57842105, now seen corresponding path program 2 times [2020-08-19 01:16:25,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:25,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886428136] [2020-08-19 01:16:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:25,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:16:25,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886428136] [2020-08-19 01:16:25,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:16:25,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 01:16:25,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931084155] [2020-08-19 01:16:25,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:16:25,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:25,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:16:25,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:16:25,966 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-08-19 01:16:25,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:25,997 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-08-19 01:16:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 01:16:25,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-19 01:16:25,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:25,999 INFO L225 Difference]: With dead ends: 27 [2020-08-19 01:16:25,999 INFO L226 Difference]: Without dead ends: 19 [2020-08-19 01:16:26,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:16:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-19 01:16:26,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-08-19 01:16:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 01:16:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 01:16:26,006 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-08-19 01:16:26,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:26,007 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 01:16:26,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:16:26,007 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 01:16:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 01:16:26,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:26,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:26,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:16:26,009 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:26,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:26,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-08-19 01:16:26,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:26,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000933555] [2020-08-19 01:16:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:26,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 01:16:26,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000933555] [2020-08-19 01:16:26,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:16:26,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 01:16:26,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796396432] [2020-08-19 01:16:26,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 01:16:26,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:26,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 01:16:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:16:26,264 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-08-19 01:16:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:26,458 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-08-19 01:16:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 01:16:26,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-08-19 01:16:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:26,460 INFO L225 Difference]: With dead ends: 27 [2020-08-19 01:16:26,460 INFO L226 Difference]: Without dead ends: 22 [2020-08-19 01:16:26,461 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 01:16:26,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-19 01:16:26,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-19 01:16:26,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 01:16:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-08-19 01:16:26,466 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-08-19 01:16:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:26,466 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-08-19 01:16:26,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 01:16:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-08-19 01:16:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 01:16:26,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:26,468 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:26,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:16:26,468 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 3 times [2020-08-19 01:16:26,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:26,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597661227] [2020-08-19 01:16:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:26,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:16:26,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597661227] [2020-08-19 01:16:26,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:16:26,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 01:16:26,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111329570] [2020-08-19 01:16:26,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:16:26,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:26,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:16:26,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:16:26,516 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-08-19 01:16:26,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:26,549 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-19 01:16:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:16:26,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-19 01:16:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:26,551 INFO L225 Difference]: With dead ends: 33 [2020-08-19 01:16:26,551 INFO L226 Difference]: Without dead ends: 25 [2020-08-19 01:16:26,552 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 01:16:26,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-19 01:16:26,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-19 01:16:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 01:16:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-19 01:16:26,558 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-08-19 01:16:26,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:26,558 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-19 01:16:26,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:16:26,559 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-19 01:16:26,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:16:26,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:26,560 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:26,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:16:26,560 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:26,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:26,561 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 4 times [2020-08-19 01:16:26,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:26,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636206474] [2020-08-19 01:16:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:26,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:16:26,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636206474] [2020-08-19 01:16:26,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:16:26,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 01:16:26,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326975744] [2020-08-19 01:16:26,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 01:16:26,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:26,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 01:16:26,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:16:26,624 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-08-19 01:16:26,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:26,669 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-19 01:16:26,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 01:16:26,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-19 01:16:26,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:26,671 INFO L225 Difference]: With dead ends: 36 [2020-08-19 01:16:26,671 INFO L226 Difference]: Without dead ends: 28 [2020-08-19 01:16:26,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:16:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-19 01:16:26,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-19 01:16:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 01:16:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-19 01:16:26,680 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-08-19 01:16:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:26,680 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-19 01:16:26,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 01:16:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-19 01:16:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 01:16:26,683 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:26,683 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:26,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:16:26,684 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:26,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 5 times [2020-08-19 01:16:26,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:26,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669365427] [2020-08-19 01:16:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:26,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:16:26,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669365427] [2020-08-19 01:16:26,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:16:26,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 01:16:26,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059268239] [2020-08-19 01:16:26,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 01:16:26,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:26,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 01:16:26,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-19 01:16:26,771 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-08-19 01:16:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:26,816 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-19 01:16:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 01:16:26,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-19 01:16:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:26,818 INFO L225 Difference]: With dead ends: 39 [2020-08-19 01:16:26,818 INFO L226 Difference]: Without dead ends: 31 [2020-08-19 01:16:26,818 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 01:16:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-19 01:16:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-08-19 01:16:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 01:16:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-19 01:16:26,824 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-08-19 01:16:26,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:26,824 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-19 01:16:26,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 01:16:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-19 01:16:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 01:16:26,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:26,825 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:26,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 01:16:26,826 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:26,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 6 times [2020-08-19 01:16:26,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:26,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603485499] [2020-08-19 01:16:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:26,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:16:26,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603485499] [2020-08-19 01:16:26,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:16:26,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 01:16:26,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979539842] [2020-08-19 01:16:26,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:16:26,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:26,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:16:26,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:16:26,900 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-08-19 01:16:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:26,945 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-19 01:16:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 01:16:26,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-19 01:16:26,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:26,946 INFO L225 Difference]: With dead ends: 42 [2020-08-19 01:16:26,946 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 01:16:26,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:16:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 01:16:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-19 01:16:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 01:16:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-19 01:16:26,952 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-08-19 01:16:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:26,953 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-19 01:16:26,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:16:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-19 01:16:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 01:16:26,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:26,954 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:26,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 01:16:26,954 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:26,955 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 7 times [2020-08-19 01:16:26,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:26,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841900466] [2020-08-19 01:16:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:27,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:16:27,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841900466] [2020-08-19 01:16:27,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:16:27,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 01:16:27,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695839303] [2020-08-19 01:16:27,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 01:16:27,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:27,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 01:16:27,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:16:27,036 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-08-19 01:16:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:27,090 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-08-19 01:16:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 01:16:27,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-19 01:16:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:27,091 INFO L225 Difference]: With dead ends: 45 [2020-08-19 01:16:27,092 INFO L226 Difference]: Without dead ends: 37 [2020-08-19 01:16:27,092 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 01:16:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-19 01:16:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-19 01:16:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 01:16:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-19 01:16:27,099 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-08-19 01:16:27,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:27,099 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-19 01:16:27,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 01:16:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-19 01:16:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 01:16:27,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:27,101 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:27,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 01:16:27,102 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:27,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:27,102 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 8 times [2020-08-19 01:16:27,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:27,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152222107] [2020-08-19 01:16:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:27,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:16:27,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152222107] [2020-08-19 01:16:27,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:16:27,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 01:16:27,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334069826] [2020-08-19 01:16:27,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 01:16:27,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:27,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 01:16:27,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:16:27,204 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-08-19 01:16:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:27,257 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-08-19 01:16:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 01:16:27,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-08-19 01:16:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:27,259 INFO L225 Difference]: With dead ends: 48 [2020-08-19 01:16:27,259 INFO L226 Difference]: Without dead ends: 40 [2020-08-19 01:16:27,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:16:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-19 01:16:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-19 01:16:27,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 01:16:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-19 01:16:27,265 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-08-19 01:16:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:27,265 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-19 01:16:27,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 01:16:27,265 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-19 01:16:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 01:16:27,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:27,266 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:27,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 01:16:27,267 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:27,267 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 9 times [2020-08-19 01:16:27,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:27,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843539791] [2020-08-19 01:16:27,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:27,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:16:27,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843539791] [2020-08-19 01:16:27,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:16:27,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 01:16:27,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211650287] [2020-08-19 01:16:27,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 01:16:27,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 01:16:27,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-19 01:16:27,360 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-08-19 01:16:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:27,417 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-08-19 01:16:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 01:16:27,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-08-19 01:16:27,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:27,418 INFO L225 Difference]: With dead ends: 51 [2020-08-19 01:16:27,419 INFO L226 Difference]: Without dead ends: 43 [2020-08-19 01:16:27,419 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 01:16:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-19 01:16:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-08-19 01:16:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 01:16:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-19 01:16:27,425 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-08-19 01:16:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:27,425 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-19 01:16:27,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 01:16:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-19 01:16:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 01:16:27,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:27,427 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:27,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 01:16:27,427 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:27,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:27,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 10 times [2020-08-19 01:16:27,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:27,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646840218] [2020-08-19 01:16:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 01:16:27,445 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 01:16:27,445 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 01:16:27,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 01:16:27,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:16:27 BoogieIcfgContainer [2020-08-19 01:16:27,470 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:16:27,473 INFO L168 Benchmark]: Toolchain (without parser) took 3259.77 ms. Allocated memory was 139.5 MB in the beginning and 244.8 MB in the end (delta: 105.4 MB). Free memory was 102.5 MB in the beginning and 178.8 MB in the end (delta: -76.3 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:27,474 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-19 01:16:27,474 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.73 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:27,475 INFO L168 Benchmark]: Boogie Preprocessor took 123.00 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 92.8 MB in the beginning and 181.9 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:27,476 INFO L168 Benchmark]: RCFGBuilder took 276.06 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 169.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:27,477 INFO L168 Benchmark]: TraceAbstraction took 2616.64 ms. Allocated memory was 202.9 MB in the beginning and 244.8 MB in the end (delta: 41.9 MB). Free memory was 169.0 MB in the beginning and 178.8 MB in the end (delta: -9.8 MB). Peak memory consumption was 32.1 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:27,480 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.73 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.00 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 92.8 MB in the beginning and 181.9 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 276.06 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 169.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2616.64 ms. Allocated memory was 202.9 MB in the beginning and 244.8 MB in the end (delta: 41.9 MB). Free memory was 169.0 MB in the beginning and 178.8 MB in the end (delta: -9.8 MB). Peak memory consumption was 32.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 147 SDtfs, 59 SDslu, 484 SDs, 0 SdLazy, 391 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 12 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 16404 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 86/415 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...