/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:20:03,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:20:03,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:20:03,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:20:03,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:20:03,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:20:03,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:20:03,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:20:03,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:20:03,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:20:03,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:20:03,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:20:03,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:20:03,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:20:03,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:20:03,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:20:03,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:20:03,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:20:03,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:20:03,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:20:03,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:20:03,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:20:03,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:20:03,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:20:03,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 13:20:03,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:20:03,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:20:03,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:20:03,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 13:20:03,253 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:20:03,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:20:03,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:20:03,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:20:03,256 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:20:03,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:20:03,257 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:20:03,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:20:03,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:20:03,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:20:03,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:20:03,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:20:03,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:20:03,259 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:20:03,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:20:03,260 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:20:03,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:20:03,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:20:03,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:20:03,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:20:03,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:20:03,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:20:03,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:20:03,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:20:03,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:20:03,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:20:03,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:20:03,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:20:03,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:20:03,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-21 13:20:03,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:20:03,572 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:20:03,575 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:20:03,577 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:20:03,577 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:20:03,578 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-21 13:20:03,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41bef6187/b5e128fc616142979a927758c233efe9/FLAG2cf897553 [2020-08-21 13:20:04,131 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:20:04,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-21 13:20:04,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41bef6187/b5e128fc616142979a927758c233efe9/FLAG2cf897553 [2020-08-21 13:20:04,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41bef6187/b5e128fc616142979a927758c233efe9 [2020-08-21 13:20:04,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:20:04,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:20:04,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:20:04,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:20:04,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:20:04,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:20:04" (1/1) ... [2020-08-21 13:20:04,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3038d9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:04, skipping insertion in model container [2020-08-21 13:20:04,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:20:04" (1/1) ... [2020-08-21 13:20:04,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:20:04,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:20:04,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:20:04,746 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:20:04,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:20:04,784 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:20:04,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:04 WrapperNode [2020-08-21 13:20:04,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:20:04,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:20:04,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:20:04,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:20:04,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:04" (1/1) ... [2020-08-21 13:20:04,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:04" (1/1) ... [2020-08-21 13:20:04,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:04" (1/1) ... [2020-08-21 13:20:04,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:04" (1/1) ... [2020-08-21 13:20:04,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:04" (1/1) ... [2020-08-21 13:20:04,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:04" (1/1) ... [2020-08-21 13:20:04,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:04" (1/1) ... [2020-08-21 13:20:04,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:20:04,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:20:04,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:20:04,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:20:04,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:20:04,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:20:04,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:20:04,966 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-21 13:20:04,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:20:04,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:20:04,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:20:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 13:20:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 13:20:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:20:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 13:20:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 13:20:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 13:20:04,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:20:04,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:20:05,225 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:20:05,225 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 13:20:05,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:20:05 BoogieIcfgContainer [2020-08-21 13:20:05,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:20:05,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:20:05,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:20:05,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:20:05,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:20:04" (1/3) ... [2020-08-21 13:20:05,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:20:05, skipping insertion in model container [2020-08-21 13:20:05,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:04" (2/3) ... [2020-08-21 13:20:05,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:20:05, skipping insertion in model container [2020-08-21 13:20:05,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:20:05" (3/3) ... [2020-08-21 13:20:05,238 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-08-21 13:20:05,251 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:20:05,258 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:20:05,273 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:20:05,325 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:20:05,325 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:20:05,325 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:20:05,326 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:20:05,326 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:20:05,326 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:20:05,326 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:20:05,326 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:20:05,347 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-21 13:20:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 13:20:05,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:05,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:05,357 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:05,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:05,369 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-08-21 13:20:05,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:05,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322595299] [2020-08-21 13:20:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:05,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:05,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:20:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:05,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322595299] [2020-08-21 13:20:05,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:05,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:20:05,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671303074] [2020-08-21 13:20:05,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:20:05,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:05,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:20:05,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:20:05,597 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-21 13:20:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:05,684 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-08-21 13:20:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:20:05,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 13:20:05,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:05,697 INFO L225 Difference]: With dead ends: 42 [2020-08-21 13:20:05,697 INFO L226 Difference]: Without dead ends: 20 [2020-08-21 13:20:05,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:20:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-21 13:20:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-08-21 13:20:05,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 13:20:05,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-21 13:20:05,741 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-08-21 13:20:05,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:05,741 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-21 13:20:05,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:20:05,742 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-21 13:20:05,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 13:20:05,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:05,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:05,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:20:05,744 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:05,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-08-21 13:20:05,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:05,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11466696] [2020-08-21 13:20:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:05,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:05,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:20:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:05,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11466696] [2020-08-21 13:20:05,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:05,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 13:20:05,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141600035] [2020-08-21 13:20:05,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 13:20:05,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:05,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 13:20:05,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:20:05,835 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-08-21 13:20:05,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:05,898 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-08-21 13:20:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 13:20:05,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-21 13:20:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:05,900 INFO L225 Difference]: With dead ends: 34 [2020-08-21 13:20:05,901 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 13:20:05,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:20:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 13:20:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-21 13:20:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 13:20:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 13:20:05,910 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-08-21 13:20:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:05,910 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 13:20:05,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 13:20:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 13:20:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 13:20:05,911 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:05,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:05,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:20:05,912 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:05,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:05,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-08-21 13:20:05,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:05,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940068421] [2020-08-21 13:20:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:05,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:05,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 13:20:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:05,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940068421] [2020-08-21 13:20:05,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:05,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 13:20:05,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724364044] [2020-08-21 13:20:05,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:20:05,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:05,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:20:05,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:20:05,991 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-08-21 13:20:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:06,052 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-08-21 13:20:06,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:20:06,053 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 13:20:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:06,054 INFO L225 Difference]: With dead ends: 36 [2020-08-21 13:20:06,054 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 13:20:06,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:20:06,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 13:20:06,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-21 13:20:06,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 13:20:06,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-21 13:20:06,061 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-08-21 13:20:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:06,062 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-21 13:20:06,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:20:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-21 13:20:06,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 13:20:06,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:06,063 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:06,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:20:06,064 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:06,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:06,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-08-21 13:20:06,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:06,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768520191] [2020-08-21 13:20:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:06,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:06,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 13:20:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:06,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768520191] [2020-08-21 13:20:06,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:06,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 13:20:06,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208914929] [2020-08-21 13:20:06,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:20:06,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:06,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:20:06,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:20:06,197 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-08-21 13:20:06,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:06,276 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-08-21 13:20:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:20:06,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-21 13:20:06,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:06,278 INFO L225 Difference]: With dead ends: 38 [2020-08-21 13:20:06,278 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 13:20:06,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:20:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 13:20:06,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-21 13:20:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 13:20:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-21 13:20:06,285 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-08-21 13:20:06,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:06,286 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-21 13:20:06,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:20:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-21 13:20:06,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 13:20:06,287 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:06,288 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:06,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:20:06,288 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:06,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:06,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-08-21 13:20:06,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:06,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112109133] [2020-08-21 13:20:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:06,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:06,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 13:20:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:06,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112109133] [2020-08-21 13:20:06,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:06,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:20:06,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562925212] [2020-08-21 13:20:06,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:20:06,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:06,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:20:06,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:20:06,424 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-08-21 13:20:06,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:06,502 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-08-21 13:20:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:20:06,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-21 13:20:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:06,504 INFO L225 Difference]: With dead ends: 40 [2020-08-21 13:20:06,504 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 13:20:06,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:20:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 13:20:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-21 13:20:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 13:20:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 13:20:06,518 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-08-21 13:20:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:06,518 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 13:20:06,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:20:06,518 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 13:20:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 13:20:06,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:06,521 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:06,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:20:06,522 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:06,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:06,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-08-21 13:20:06,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:06,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995713154] [2020-08-21 13:20:06,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:06,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:06,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 13:20:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:06,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995713154] [2020-08-21 13:20:06,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:06,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:20:06,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849904869] [2020-08-21 13:20:06,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:20:06,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:06,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:20:06,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:20:06,670 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-08-21 13:20:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:06,734 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-08-21 13:20:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:20:06,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-21 13:20:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:06,735 INFO L225 Difference]: With dead ends: 42 [2020-08-21 13:20:06,736 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 13:20:06,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:20:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 13:20:06,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-21 13:20:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 13:20:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-08-21 13:20:06,742 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-08-21 13:20:06,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:06,742 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-08-21 13:20:06,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:20:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-08-21 13:20:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 13:20:06,744 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:06,744 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:06,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:20:06,744 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:06,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-08-21 13:20:06,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:06,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210513010] [2020-08-21 13:20:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:06,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:06,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 13:20:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:06,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210513010] [2020-08-21 13:20:06,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:06,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 13:20:06,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79073526] [2020-08-21 13:20:06,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:20:06,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:20:06,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:20:06,839 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2020-08-21 13:20:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:06,929 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-08-21 13:20:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:20:06,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-21 13:20:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:06,931 INFO L225 Difference]: With dead ends: 44 [2020-08-21 13:20:06,931 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 13:20:06,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:20:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 13:20:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-21 13:20:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 13:20:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-21 13:20:06,941 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-08-21 13:20:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:06,942 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-21 13:20:06,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:20:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-21 13:20:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 13:20:06,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:06,944 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:06,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:20:06,946 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:06,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:06,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-08-21 13:20:06,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:06,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033086056] [2020-08-21 13:20:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:20:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:07,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033086056] [2020-08-21 13:20:07,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:07,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 13:20:07,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300309064] [2020-08-21 13:20:07,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:20:07,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:07,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:20:07,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:20:07,097 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2020-08-21 13:20:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:07,167 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-08-21 13:20:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 13:20:07,167 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-08-21 13:20:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:07,168 INFO L225 Difference]: With dead ends: 46 [2020-08-21 13:20:07,168 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 13:20:07,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:20:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 13:20:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-21 13:20:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 13:20:07,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 13:20:07,174 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-08-21 13:20:07,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:07,175 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 13:20:07,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:20:07,175 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 13:20:07,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 13:20:07,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:07,176 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:07,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:20:07,177 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:07,177 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-08-21 13:20:07,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:07,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144580714] [2020-08-21 13:20:07,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 13:20:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:07,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144580714] [2020-08-21 13:20:07,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:07,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 13:20:07,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799615944] [2020-08-21 13:20:07,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:20:07,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:07,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:20:07,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:20:07,296 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 13:20:07,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:07,398 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-21 13:20:07,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:20:07,399 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-21 13:20:07,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:07,400 INFO L225 Difference]: With dead ends: 48 [2020-08-21 13:20:07,400 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 13:20:07,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:20:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 13:20:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-21 13:20:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-21 13:20:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-08-21 13:20:07,406 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-08-21 13:20:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:07,407 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-08-21 13:20:07,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:20:07,407 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-08-21 13:20:07,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 13:20:07,408 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:07,409 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:07,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:20:07,409 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:07,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:07,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-08-21 13:20:07,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:07,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132615343] [2020-08-21 13:20:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 13:20:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:07,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132615343] [2020-08-21 13:20:07,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:07,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 13:20:07,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256686533] [2020-08-21 13:20:07,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 13:20:07,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:07,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 13:20:07,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:20:07,549 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2020-08-21 13:20:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:07,622 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-08-21 13:20:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:20:07,623 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-08-21 13:20:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:07,624 INFO L225 Difference]: With dead ends: 50 [2020-08-21 13:20:07,624 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 13:20:07,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:20:07,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 13:20:07,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-21 13:20:07,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 13:20:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-21 13:20:07,630 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-08-21 13:20:07,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:07,630 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-21 13:20:07,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 13:20:07,630 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-21 13:20:07,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 13:20:07,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:07,631 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:07,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:20:07,632 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:07,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:07,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-08-21 13:20:07,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:07,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540561740] [2020-08-21 13:20:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:20:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:07,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540561740] [2020-08-21 13:20:07,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:07,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 13:20:07,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197681924] [2020-08-21 13:20:07,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 13:20:07,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:07,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 13:20:07,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:20:07,758 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 13 states. [2020-08-21 13:20:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:07,843 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-08-21 13:20:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 13:20:07,844 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-21 13:20:07,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:07,845 INFO L225 Difference]: With dead ends: 52 [2020-08-21 13:20:07,845 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 13:20:07,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:20:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 13:20:07,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-21 13:20:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 13:20:07,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 13:20:07,851 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-08-21 13:20:07,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:07,851 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 13:20:07,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 13:20:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 13:20:07,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 13:20:07,853 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:07,853 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:07,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:20:07,853 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:07,854 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-08-21 13:20:07,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:07,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466397370] [2020-08-21 13:20:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 13:20:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:07,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466397370] [2020-08-21 13:20:07,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:07,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 13:20:07,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027355479] [2020-08-21 13:20:07,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 13:20:07,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:07,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 13:20:07,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:20:07,995 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-08-21 13:20:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:08,091 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-08-21 13:20:08,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 13:20:08,091 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-21 13:20:08,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:08,092 INFO L225 Difference]: With dead ends: 54 [2020-08-21 13:20:08,092 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 13:20:08,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:20:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 13:20:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-21 13:20:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-21 13:20:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-08-21 13:20:08,098 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-08-21 13:20:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:08,098 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-08-21 13:20:08,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 13:20:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-08-21 13:20:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 13:20:08,099 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:08,100 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:08,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 13:20:08,100 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:08,100 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-08-21 13:20:08,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:08,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228472873] [2020-08-21 13:20:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:08,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:08,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 13:20:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:08,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228472873] [2020-08-21 13:20:08,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:08,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 13:20:08,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256727848] [2020-08-21 13:20:08,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 13:20:08,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:08,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 13:20:08,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:20:08,271 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-08-21 13:20:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:08,367 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-08-21 13:20:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 13:20:08,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-08-21 13:20:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:08,369 INFO L225 Difference]: With dead ends: 56 [2020-08-21 13:20:08,369 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 13:20:08,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:20:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 13:20:08,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-21 13:20:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 13:20:08,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-21 13:20:08,375 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-08-21 13:20:08,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:08,375 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-21 13:20:08,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 13:20:08,376 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-21 13:20:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 13:20:08,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:08,376 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:08,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 13:20:08,377 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-08-21 13:20:08,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:08,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208395198] [2020-08-21 13:20:08,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:08,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:08,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 13:20:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:08,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208395198] [2020-08-21 13:20:08,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:08,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 13:20:08,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960597628] [2020-08-21 13:20:08,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 13:20:08,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:08,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 13:20:08,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-21 13:20:08,549 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 16 states. [2020-08-21 13:20:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:08,628 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-08-21 13:20:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 13:20:08,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-08-21 13:20:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:08,629 INFO L225 Difference]: With dead ends: 58 [2020-08-21 13:20:08,630 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 13:20:08,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-21 13:20:08,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 13:20:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-21 13:20:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 13:20:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 13:20:08,638 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-08-21 13:20:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:08,638 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 13:20:08,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 13:20:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 13:20:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 13:20:08,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:08,642 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:08,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 13:20:08,643 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-08-21 13:20:08,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:08,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771995006] [2020-08-21 13:20:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:08,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:08,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:20:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:08,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771995006] [2020-08-21 13:20:08,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:08,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 13:20:08,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108638955] [2020-08-21 13:20:08,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 13:20:08,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:08,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 13:20:08,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-21 13:20:08,865 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-08-21 13:20:09,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:09,009 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-08-21 13:20:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 13:20:09,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-08-21 13:20:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:09,011 INFO L225 Difference]: With dead ends: 60 [2020-08-21 13:20:09,011 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 13:20:09,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-21 13:20:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 13:20:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-08-21 13:20:09,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-21 13:20:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-08-21 13:20:09,024 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-08-21 13:20:09,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:09,024 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-08-21 13:20:09,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 13:20:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-08-21 13:20:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 13:20:09,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:09,026 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:09,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 13:20:09,027 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:09,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-08-21 13:20:09,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:09,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403554924] [2020-08-21 13:20:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:09,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:09,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 13:20:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:09,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403554924] [2020-08-21 13:20:09,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:09,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 13:20:09,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806178058] [2020-08-21 13:20:09,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 13:20:09,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:09,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 13:20:09,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-21 13:20:09,308 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-08-21 13:20:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:09,419 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-08-21 13:20:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 13:20:09,419 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-08-21 13:20:09,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:09,420 INFO L225 Difference]: With dead ends: 62 [2020-08-21 13:20:09,420 INFO L226 Difference]: Without dead ends: 50 [2020-08-21 13:20:09,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-21 13:20:09,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-21 13:20:09,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-08-21 13:20:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-21 13:20:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-08-21 13:20:09,431 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-08-21 13:20:09,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:09,436 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-08-21 13:20:09,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 13:20:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-08-21 13:20:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 13:20:09,437 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:09,437 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:09,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 13:20:09,438 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:09,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:09,438 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-08-21 13:20:09,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:09,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666043557] [2020-08-21 13:20:09,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:09,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:09,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:20:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:09,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666043557] [2020-08-21 13:20:09,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:09,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 13:20:09,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84845596] [2020-08-21 13:20:09,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 13:20:09,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:09,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 13:20:09,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-21 13:20:09,692 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 19 states. [2020-08-21 13:20:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:09,776 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-08-21 13:20:09,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 13:20:09,777 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-08-21 13:20:09,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:09,778 INFO L225 Difference]: With dead ends: 64 [2020-08-21 13:20:09,778 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 13:20:09,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-21 13:20:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 13:20:09,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-21 13:20:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 13:20:09,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 13:20:09,785 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-08-21 13:20:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:09,785 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 13:20:09,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 13:20:09,786 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 13:20:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 13:20:09,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:09,787 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:09,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 13:20:09,787 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:09,787 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-08-21 13:20:09,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:09,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625287924] [2020-08-21 13:20:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:10,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:10,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 13:20:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:10,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625287924] [2020-08-21 13:20:10,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:10,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 13:20:10,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494955500] [2020-08-21 13:20:10,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 13:20:10,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:10,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 13:20:10,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-21 13:20:10,065 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2020-08-21 13:20:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:10,194 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-08-21 13:20:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 13:20:10,194 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-08-21 13:20:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:10,196 INFO L225 Difference]: With dead ends: 66 [2020-08-21 13:20:10,196 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 13:20:10,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-21 13:20:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 13:20:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-21 13:20:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-21 13:20:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-08-21 13:20:10,210 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-08-21 13:20:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:10,211 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-08-21 13:20:10,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 13:20:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-08-21 13:20:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 13:20:10,211 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:10,211 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:10,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 13:20:10,214 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:10,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:10,215 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-08-21 13:20:10,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:10,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719451709] [2020-08-21 13:20:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:10,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:10,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 13:20:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:10,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719451709] [2020-08-21 13:20:10,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:10,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 13:20:10,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733714711] [2020-08-21 13:20:10,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 13:20:10,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:10,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 13:20:10,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-21 13:20:10,478 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2020-08-21 13:20:10,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:10,601 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-08-21 13:20:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 13:20:10,602 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-08-21 13:20:10,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:10,602 INFO L225 Difference]: With dead ends: 68 [2020-08-21 13:20:10,602 INFO L226 Difference]: Without dead ends: 56 [2020-08-21 13:20:10,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-21 13:20:10,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-21 13:20:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-21 13:20:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-21 13:20:10,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-08-21 13:20:10,608 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-08-21 13:20:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:10,608 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-08-21 13:20:10,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 13:20:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-08-21 13:20:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 13:20:10,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:10,609 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:10,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 13:20:10,609 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:10,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:10,610 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-08-21 13:20:10,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:10,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479114661] [2020-08-21 13:20:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:10,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:10,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:20:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:10,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479114661] [2020-08-21 13:20:10,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:10,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 13:20:10,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141751111] [2020-08-21 13:20:10,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 13:20:10,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:10,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 13:20:10,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-21 13:20:10,874 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 22 states. [2020-08-21 13:20:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:10,984 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-08-21 13:20:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 13:20:10,985 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-08-21 13:20:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:10,986 INFO L225 Difference]: With dead ends: 70 [2020-08-21 13:20:10,986 INFO L226 Difference]: Without dead ends: 58 [2020-08-21 13:20:10,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-21 13:20:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-21 13:20:10,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-21 13:20:10,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 13:20:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 13:20:10,992 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-08-21 13:20:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:10,992 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 13:20:10,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 13:20:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 13:20:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 13:20:10,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:10,993 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:10,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 13:20:10,994 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:10,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:10,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-08-21 13:20:10,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:10,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343012764] [2020-08-21 13:20:10,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:11,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:11,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 13:20:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:11,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343012764] [2020-08-21 13:20:11,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:11,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 13:20:11,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858140625] [2020-08-21 13:20:11,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 13:20:11,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:11,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 13:20:11,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-21 13:20:11,302 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 23 states. [2020-08-21 13:20:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:11,441 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-08-21 13:20:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 13:20:11,441 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-08-21 13:20:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:11,442 INFO L225 Difference]: With dead ends: 71 [2020-08-21 13:20:11,442 INFO L226 Difference]: Without dead ends: 59 [2020-08-21 13:20:11,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-21 13:20:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-21 13:20:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-08-21 13:20:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-21 13:20:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-08-21 13:20:11,453 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-08-21 13:20:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:11,453 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-08-21 13:20:11,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 13:20:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-08-21 13:20:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 13:20:11,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:11,454 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:11,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 13:20:11,455 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:11,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:11,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2020-08-21 13:20:11,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:11,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293163635] [2020-08-21 13:20:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 13:20:11,554 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 13:20:11,554 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 13:20:11,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 13:20:11,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:20:11 BoogieIcfgContainer [2020-08-21 13:20:11,583 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:20:11,585 INFO L168 Benchmark]: Toolchain (without parser) took 7106.94 ms. Allocated memory was 140.0 MB in the beginning and 312.0 MB in the end (delta: 172.0 MB). Free memory was 103.3 MB in the beginning and 194.4 MB in the end (delta: -91.2 MB). Peak memory consumption was 80.8 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:11,586 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-21 13:20:11,587 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.59 ms. Allocated memory is still 140.0 MB. Free memory was 103.3 MB in the beginning and 92.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:11,588 INFO L168 Benchmark]: Boogie Preprocessor took 110.46 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 180.2 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:11,588 INFO L168 Benchmark]: RCFGBuilder took 333.14 ms. Allocated memory is still 202.4 MB. Free memory was 180.2 MB in the beginning and 164.3 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:11,589 INFO L168 Benchmark]: TraceAbstraction took 6352.21 ms. Allocated memory was 202.4 MB in the beginning and 312.0 MB in the end (delta: 109.6 MB). Free memory was 163.4 MB in the beginning and 194.4 MB in the end (delta: -31.1 MB). Peak memory consumption was 78.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:11,592 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.59 ms. Allocated memory is still 140.0 MB. Free memory was 103.3 MB in the beginning and 92.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.46 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 180.2 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 333.14 ms. Allocated memory is still 202.4 MB. Free memory was 180.2 MB in the beginning and 164.3 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6352.21 ms. Allocated memory was 202.4 MB in the beginning and 312.0 MB in the end (delta: 109.6 MB). Free memory was 163.4 MB in the beginning and 194.4 MB in the end (delta: -31.1 MB). Peak memory consumption was 78.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.2s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 252 SDslu, 1934 SDs, 0 SdLazy, 1339 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 336 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 815 NumberOfCodeBlocks, 815 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 736 ConstructedInterpolants, 0 QuantifiedInterpolants, 69580 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2470 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...