/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 13:03:17,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 13:03:17,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 13:03:17,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 13:03:17,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 13:03:17,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 13:03:17,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 13:03:17,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 13:03:17,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 13:03:17,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 13:03:17,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 13:03:17,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 13:03:17,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 13:03:17,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 13:03:17,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 13:03:17,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 13:03:17,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 13:03:17,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 13:03:17,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 13:03:17,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 13:03:17,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 13:03:17,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 13:03:17,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 13:03:17,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 13:03:17,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 13:03:17,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 13:03:17,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 13:03:17,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 13:03:17,681 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 13:03:17,720 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 13:03:17,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 13:03:17,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 13:03:17,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 13:03:17,722 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 13:03:17,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 13:03:17,723 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 13:03:17,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 13:03:17,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 13:03:17,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 13:03:17,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 13:03:17,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 13:03:17,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 13:03:17,725 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 13:03:17,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 13:03:17,726 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 13:03:17,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 13:03:17,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 13:03:17,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 13:03:17,726 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 13:03:17,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 13:03:17,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:03:17,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 13:03:17,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 13:03:17,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 13:03:17,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 13:03:17,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 13:03:17,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 13:03:17,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 13:03:17,728 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 13:03:18,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 13:03:18,015 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 13:03:18,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 13:03:18,019 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 13:03:18,020 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 13:03:18,021 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-18 13:03:18,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6ffb87c3/1bcbe897d95646588b4635a01505174c/FLAG7137cb331 [2020-08-18 13:03:18,522 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 13:03:18,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-18 13:03:18,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6ffb87c3/1bcbe897d95646588b4635a01505174c/FLAG7137cb331 [2020-08-18 13:03:18,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6ffb87c3/1bcbe897d95646588b4635a01505174c [2020-08-18 13:03:18,900 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 13:03:18,902 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 13:03:18,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 13:03:18,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 13:03:18,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 13:03:18,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:03:18" (1/1) ... [2020-08-18 13:03:18,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7845d484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:03:18, skipping insertion in model container [2020-08-18 13:03:18,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:03:18" (1/1) ... [2020-08-18 13:03:18,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 13:03:18,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 13:03:19,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:03:19,121 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 13:03:19,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:03:19,242 INFO L208 MainTranslator]: Completed translation [2020-08-18 13:03:19,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:03:19 WrapperNode [2020-08-18 13:03:19,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 13:03:19,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 13:03:19,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 13:03:19,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 13:03:19,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:03:19" (1/1) ... [2020-08-18 13:03:19,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:03:19" (1/1) ... [2020-08-18 13:03:19,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:03:19" (1/1) ... [2020-08-18 13:03:19,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:03:19" (1/1) ... [2020-08-18 13:03:19,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:03:19" (1/1) ... [2020-08-18 13:03:19,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:03:19" (1/1) ... [2020-08-18 13:03:19,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:03:19" (1/1) ... [2020-08-18 13:03:19,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 13:03:19,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 13:03:19,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 13:03:19,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 13:03:19,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:03:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:03:19,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 13:03:19,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 13:03:19,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 13:03:19,369 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-18 13:03:19,370 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-18 13:03:19,370 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 13:03:19,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 13:03:19,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 13:03:19,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 13:03:19,371 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-18 13:03:19,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 13:03:19,372 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-18 13:03:19,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 13:03:19,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 13:03:19,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 13:03:19,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 13:03:19,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 13:03:19,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 13:03:19,771 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 13:03:19,772 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-18 13:03:19,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:03:19 BoogieIcfgContainer [2020-08-18 13:03:19,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 13:03:19,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 13:03:19,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 13:03:19,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 13:03:19,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 01:03:18" (1/3) ... [2020-08-18 13:03:19,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116d5bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:03:19, skipping insertion in model container [2020-08-18 13:03:19,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:03:19" (2/3) ... [2020-08-18 13:03:19,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116d5bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:03:19, skipping insertion in model container [2020-08-18 13:03:19,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:03:19" (3/3) ... [2020-08-18 13:03:19,784 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-18 13:03:19,794 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 13:03:19,801 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 13:03:19,814 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 13:03:19,836 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 13:03:19,837 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 13:03:19,837 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 13:03:19,837 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 13:03:19,837 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 13:03:19,837 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 13:03:19,837 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 13:03:19,837 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 13:03:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-18 13:03:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 13:03:19,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:19,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:19,862 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:19,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:19,868 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-18 13:03:19,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:19,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497166682] [2020-08-18 13:03:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:20,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:20,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497166682] [2020-08-18 13:03:20,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:03:20,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:03:20,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544864700] [2020-08-18 13:03:20,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:03:20,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:20,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:03:20,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:03:20,090 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-18 13:03:20,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:20,365 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-18 13:03:20,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 13:03:20,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-18 13:03:20,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:20,378 INFO L225 Difference]: With dead ends: 150 [2020-08-18 13:03:20,378 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 13:03:20,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:03:20,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 13:03:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-18 13:03:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 13:03:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-18 13:03:20,436 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-18 13:03:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:20,436 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-18 13:03:20,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:03:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-18 13:03:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 13:03:20,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:20,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:20,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 13:03:20,439 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:20,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:20,440 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-18 13:03:20,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:20,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250398323] [2020-08-18 13:03:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:20,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:20,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250398323] [2020-08-18 13:03:20,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:20,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 13:03:20,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574519151] [2020-08-18 13:03:20,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:03:20,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:20,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:03:20,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:03:20,536 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-18 13:03:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:20,847 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-18 13:03:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:03:20,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-18 13:03:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:20,850 INFO L225 Difference]: With dead ends: 170 [2020-08-18 13:03:20,850 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 13:03:20,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:03:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 13:03:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-18 13:03:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-18 13:03:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-18 13:03:20,876 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-18 13:03:20,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:20,878 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-18 13:03:20,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:03:20,878 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-18 13:03:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 13:03:20,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:20,880 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:20,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 13:03:20,881 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:20,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-18 13:03:20,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:20,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993384107] [2020-08-18 13:03:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:20,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:20,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993384107] [2020-08-18 13:03:20,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:20,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 13:03:20,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909330151] [2020-08-18 13:03:20,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 13:03:20,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:20,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 13:03:20,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 13:03:20,987 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-18 13:03:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:21,264 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-18 13:03:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 13:03:21,265 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-18 13:03:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:21,268 INFO L225 Difference]: With dead ends: 203 [2020-08-18 13:03:21,268 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 13:03:21,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 13:03:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 13:03:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-18 13:03:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-18 13:03:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-18 13:03:21,285 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-18 13:03:21,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:21,288 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-18 13:03:21,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 13:03:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-18 13:03:21,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 13:03:21,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:21,289 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:21,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 13:03:21,289 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:21,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:21,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-18 13:03:21,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:21,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503879990] [2020-08-18 13:03:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:21,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:21,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503879990] [2020-08-18 13:03:21,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:21,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 13:03:21,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801306443] [2020-08-18 13:03:21,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 13:03:21,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:21,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 13:03:21,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:03:21,402 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-18 13:03:21,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:21,783 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-18 13:03:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 13:03:21,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-18 13:03:21,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:21,785 INFO L225 Difference]: With dead ends: 236 [2020-08-18 13:03:21,786 INFO L226 Difference]: Without dead ends: 188 [2020-08-18 13:03:21,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:03:21,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-18 13:03:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-18 13:03:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 13:03:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-18 13:03:21,798 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-18 13:03:21,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:21,798 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-18 13:03:21,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 13:03:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-18 13:03:21,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 13:03:21,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:21,800 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:21,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 13:03:21,800 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:21,800 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-18 13:03:21,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:21,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080873193] [2020-08-18 13:03:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:21,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 13:03:21,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080873193] [2020-08-18 13:03:21,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:03:21,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 13:03:21,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942690349] [2020-08-18 13:03:21,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:03:21,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:21,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:03:21,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:03:21,856 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-18 13:03:21,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:21,964 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-18 13:03:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:03:21,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-18 13:03:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:21,966 INFO L225 Difference]: With dead ends: 116 [2020-08-18 13:03:21,966 INFO L226 Difference]: Without dead ends: 67 [2020-08-18 13:03:21,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:03:21,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-18 13:03:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-18 13:03:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-18 13:03:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-18 13:03:21,979 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-18 13:03:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:21,983 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-18 13:03:21,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:03:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-18 13:03:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 13:03:21,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:21,985 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:21,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 13:03:21,986 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:21,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:21,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-18 13:03:21,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:21,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239508836] [2020-08-18 13:03:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:22,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:22,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 13:03:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:22,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 13:03:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:22,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239508836] [2020-08-18 13:03:22,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:22,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 13:03:22,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774583535] [2020-08-18 13:03:22,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:03:22,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:03:22,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:03:22,109 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-18 13:03:22,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:22,443 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-18 13:03:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 13:03:22,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-18 13:03:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:22,451 INFO L225 Difference]: With dead ends: 223 [2020-08-18 13:03:22,451 INFO L226 Difference]: Without dead ends: 173 [2020-08-18 13:03:22,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-18 13:03:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-18 13:03:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-18 13:03:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-18 13:03:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-18 13:03:22,466 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-18 13:03:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:22,467 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-18 13:03:22,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:03:22,467 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-18 13:03:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 13:03:22,468 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:22,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:22,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 13:03:22,469 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:22,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:22,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-18 13:03:22,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:22,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837308647] [2020-08-18 13:03:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:22,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:22,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 13:03:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:22,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 13:03:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:22,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837308647] [2020-08-18 13:03:22,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:22,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 13:03:22,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421788547] [2020-08-18 13:03:22,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 13:03:22,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:22,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 13:03:22,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 13:03:22,599 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-18 13:03:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:23,021 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-18 13:03:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 13:03:23,022 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 13:03:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:23,024 INFO L225 Difference]: With dead ends: 246 [2020-08-18 13:03:23,024 INFO L226 Difference]: Without dead ends: 196 [2020-08-18 13:03:23,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-18 13:03:23,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-18 13:03:23,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-18 13:03:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 13:03:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-18 13:03:23,044 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-18 13:03:23,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:23,044 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-18 13:03:23,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 13:03:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-18 13:03:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 13:03:23,046 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:23,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:23,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 13:03:23,047 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:23,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:23,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-18 13:03:23,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:23,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705889460] [2020-08-18 13:03:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:23,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:23,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 13:03:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:23,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 13:03:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:23,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705889460] [2020-08-18 13:03:23,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:23,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 13:03:23,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511945286] [2020-08-18 13:03:23,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 13:03:23,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:23,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 13:03:23,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 13:03:23,157 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-18 13:03:23,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:23,642 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-18 13:03:23,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 13:03:23,642 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-18 13:03:23,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:23,644 INFO L225 Difference]: With dead ends: 269 [2020-08-18 13:03:23,644 INFO L226 Difference]: Without dead ends: 219 [2020-08-18 13:03:23,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-08-18 13:03:23,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-18 13:03:23,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-18 13:03:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-18 13:03:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-18 13:03:23,656 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-18 13:03:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:23,656 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-18 13:03:23,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 13:03:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-18 13:03:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 13:03:23,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:23,658 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:23,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 13:03:23,658 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:23,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-18 13:03:23,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:23,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752932101] [2020-08-18 13:03:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:23,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:23,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:03:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:23,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 13:03:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:23,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752932101] [2020-08-18 13:03:23,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:23,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 13:03:23,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979492278] [2020-08-18 13:03:23,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 13:03:23,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:23,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 13:03:23,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 13:03:23,768 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-18 13:03:24,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:24,276 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-18 13:03:24,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 13:03:24,277 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-18 13:03:24,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:24,280 INFO L225 Difference]: With dead ends: 292 [2020-08-18 13:03:24,280 INFO L226 Difference]: Without dead ends: 242 [2020-08-18 13:03:24,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-18 13:03:24,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-18 13:03:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-18 13:03:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-18 13:03:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-18 13:03:24,291 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-18 13:03:24,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:24,292 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-18 13:03:24,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 13:03:24,292 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-18 13:03:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 13:03:24,294 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:24,294 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:24,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 13:03:24,294 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:24,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:24,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-18 13:03:24,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:24,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042787509] [2020-08-18 13:03:24,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:24,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:24,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 13:03:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:24,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 13:03:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:24,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042787509] [2020-08-18 13:03:24,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:24,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 13:03:24,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843591786] [2020-08-18 13:03:24,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 13:03:24,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:24,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 13:03:24,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 13:03:24,459 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-18 13:03:25,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:25,012 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-18 13:03:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 13:03:25,013 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-18 13:03:25,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:25,016 INFO L225 Difference]: With dead ends: 315 [2020-08-18 13:03:25,016 INFO L226 Difference]: Without dead ends: 265 [2020-08-18 13:03:25,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-08-18 13:03:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-18 13:03:25,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-18 13:03:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 13:03:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-18 13:03:25,026 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-18 13:03:25,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:25,026 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-18 13:03:25,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 13:03:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-18 13:03:25,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 13:03:25,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:25,027 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:25,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 13:03:25,028 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:25,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:25,028 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-18 13:03:25,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:25,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928834162] [2020-08-18 13:03:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:25,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:25,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 13:03:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:25,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 13:03:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:25,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928834162] [2020-08-18 13:03:25,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:25,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 13:03:25,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952113687] [2020-08-18 13:03:25,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 13:03:25,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:25,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 13:03:25,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 13:03:25,179 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-18 13:03:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:25,711 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-18 13:03:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 13:03:25,712 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-18 13:03:25,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:25,715 INFO L225 Difference]: With dead ends: 338 [2020-08-18 13:03:25,715 INFO L226 Difference]: Without dead ends: 288 [2020-08-18 13:03:25,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-08-18 13:03:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-18 13:03:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-18 13:03:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 13:03:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-18 13:03:25,725 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-18 13:03:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:25,725 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-18 13:03:25,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 13:03:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-18 13:03:25,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 13:03:25,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:25,727 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:25,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 13:03:25,727 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:25,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:25,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-18 13:03:25,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:25,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663252217] [2020-08-18 13:03:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:25,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:25,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 13:03:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:25,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:03:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:25,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663252217] [2020-08-18 13:03:25,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:25,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 13:03:25,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238171157] [2020-08-18 13:03:25,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 13:03:25,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:25,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 13:03:25,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 13:03:25,880 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-18 13:03:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:26,559 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-18 13:03:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 13:03:26,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-18 13:03:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:26,563 INFO L225 Difference]: With dead ends: 361 [2020-08-18 13:03:26,563 INFO L226 Difference]: Without dead ends: 311 [2020-08-18 13:03:26,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-08-18 13:03:26,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-18 13:03:26,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-18 13:03:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 13:03:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-18 13:03:26,573 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-18 13:03:26,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:26,573 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-18 13:03:26,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 13:03:26,573 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-18 13:03:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 13:03:26,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:26,575 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:26,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 13:03:26,575 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:26,575 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-18 13:03:26,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:26,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803557773] [2020-08-18 13:03:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:26,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:26,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 13:03:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:26,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 13:03:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:26,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803557773] [2020-08-18 13:03:26,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:26,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 13:03:26,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793215307] [2020-08-18 13:03:26,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 13:03:26,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:26,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 13:03:26,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 13:03:26,760 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-18 13:03:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:27,488 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-18 13:03:27,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 13:03:27,488 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-18 13:03:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:27,493 INFO L225 Difference]: With dead ends: 384 [2020-08-18 13:03:27,493 INFO L226 Difference]: Without dead ends: 334 [2020-08-18 13:03:27,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-08-18 13:03:27,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-18 13:03:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-18 13:03:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 13:03:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-18 13:03:27,511 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-18 13:03:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:27,511 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-18 13:03:27,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 13:03:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-18 13:03:27,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 13:03:27,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:27,513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:27,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 13:03:27,514 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:27,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:27,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-18 13:03:27,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:27,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313414234] [2020-08-18 13:03:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:27,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:27,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 13:03:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:27,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 13:03:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:27,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313414234] [2020-08-18 13:03:27,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:27,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 13:03:27,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114205240] [2020-08-18 13:03:27,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 13:03:27,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:27,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 13:03:27,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 13:03:27,732 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-18 13:03:28,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:28,407 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-18 13:03:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 13:03:28,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-18 13:03:28,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:28,411 INFO L225 Difference]: With dead ends: 407 [2020-08-18 13:03:28,411 INFO L226 Difference]: Without dead ends: 357 [2020-08-18 13:03:28,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-08-18 13:03:28,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-18 13:03:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-18 13:03:28,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 13:03:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-18 13:03:28,423 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-18 13:03:28,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:28,424 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-18 13:03:28,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 13:03:28,424 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-18 13:03:28,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 13:03:28,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:28,425 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:28,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 13:03:28,425 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:28,425 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-18 13:03:28,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:28,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390770778] [2020-08-18 13:03:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:28,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:28,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 13:03:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:28,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 13:03:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:28,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390770778] [2020-08-18 13:03:28,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:28,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 13:03:28,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673548554] [2020-08-18 13:03:28,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 13:03:28,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:28,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 13:03:28,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 13:03:28,648 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-18 13:03:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:29,413 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-18 13:03:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 13:03:29,413 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-18 13:03:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:29,416 INFO L225 Difference]: With dead ends: 430 [2020-08-18 13:03:29,416 INFO L226 Difference]: Without dead ends: 380 [2020-08-18 13:03:29,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-08-18 13:03:29,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-18 13:03:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-18 13:03:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 13:03:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-18 13:03:29,430 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-18 13:03:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:29,431 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-18 13:03:29,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 13:03:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-18 13:03:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 13:03:29,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:29,432 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:29,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 13:03:29,432 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:29,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-18 13:03:29,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:29,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147990838] [2020-08-18 13:03:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:29,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:29,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:03:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:29,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 13:03:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:29,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147990838] [2020-08-18 13:03:29,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:29,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 13:03:29,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279643869] [2020-08-18 13:03:29,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 13:03:29,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:29,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 13:03:29,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 13:03:29,669 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-18 13:03:30,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:30,567 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-18 13:03:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 13:03:30,568 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-18 13:03:30,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:30,570 INFO L225 Difference]: With dead ends: 453 [2020-08-18 13:03:30,570 INFO L226 Difference]: Without dead ends: 403 [2020-08-18 13:03:30,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-08-18 13:03:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-18 13:03:30,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-18 13:03:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-18 13:03:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-18 13:03:30,590 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-18 13:03:30,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:30,591 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-18 13:03:30,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 13:03:30,591 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-18 13:03:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 13:03:30,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:30,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:30,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 13:03:30,592 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:30,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-18 13:03:30,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:30,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096212033] [2020-08-18 13:03:30,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:30,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:30,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 13:03:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:30,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 13:03:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:30,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096212033] [2020-08-18 13:03:30,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:30,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 13:03:30,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073796997] [2020-08-18 13:03:30,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 13:03:30,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:30,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 13:03:30,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-18 13:03:30,821 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-18 13:03:31,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:31,680 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-18 13:03:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 13:03:31,681 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-18 13:03:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:31,683 INFO L225 Difference]: With dead ends: 476 [2020-08-18 13:03:31,683 INFO L226 Difference]: Without dead ends: 426 [2020-08-18 13:03:31,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-08-18 13:03:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-18 13:03:31,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-18 13:03:31,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-18 13:03:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-18 13:03:31,694 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-18 13:03:31,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:31,695 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-18 13:03:31,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 13:03:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-18 13:03:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 13:03:31,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:31,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:31,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 13:03:31,696 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-18 13:03:31,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:31,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993125361] [2020-08-18 13:03:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:31,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:31,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 13:03:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:31,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 13:03:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:31,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993125361] [2020-08-18 13:03:31,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:31,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 13:03:31,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736426924] [2020-08-18 13:03:31,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 13:03:31,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:31,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 13:03:31,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 13:03:31,937 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-18 13:03:32,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:32,985 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-18 13:03:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 13:03:32,985 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-18 13:03:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:32,989 INFO L225 Difference]: With dead ends: 499 [2020-08-18 13:03:32,989 INFO L226 Difference]: Without dead ends: 449 [2020-08-18 13:03:32,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2020-08-18 13:03:32,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-18 13:03:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-18 13:03:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-18 13:03:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-18 13:03:32,999 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-18 13:03:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:33,000 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-18 13:03:33,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 13:03:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-18 13:03:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 13:03:33,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:33,001 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:33,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 13:03:33,001 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:33,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:33,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-18 13:03:33,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:33,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286551022] [2020-08-18 13:03:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:33,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:33,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 13:03:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:33,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:03:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:33,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286551022] [2020-08-18 13:03:33,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:33,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 13:03:33,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045694245] [2020-08-18 13:03:33,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 13:03:33,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:33,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 13:03:33,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-18 13:03:33,273 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-18 13:03:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:34,498 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-18 13:03:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 13:03:34,499 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-18 13:03:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:34,503 INFO L225 Difference]: With dead ends: 522 [2020-08-18 13:03:34,503 INFO L226 Difference]: Without dead ends: 472 [2020-08-18 13:03:34,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-08-18 13:03:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-18 13:03:34,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-18 13:03:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-18 13:03:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-18 13:03:34,518 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-18 13:03:34,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:34,518 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-18 13:03:34,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 13:03:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-18 13:03:34,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 13:03:34,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:34,519 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:34,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 13:03:34,520 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:34,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-18 13:03:34,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:34,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442365838] [2020-08-18 13:03:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:34,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:34,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 13:03:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:34,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 13:03:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:34,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442365838] [2020-08-18 13:03:34,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:34,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 13:03:34,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201365951] [2020-08-18 13:03:34,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 13:03:34,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:34,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 13:03:34,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 13:03:34,780 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-18 13:03:35,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:35,991 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-18 13:03:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 13:03:35,992 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-18 13:03:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:35,999 INFO L225 Difference]: With dead ends: 545 [2020-08-18 13:03:35,999 INFO L226 Difference]: Without dead ends: 495 [2020-08-18 13:03:36,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-08-18 13:03:36,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-18 13:03:36,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-18 13:03:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-18 13:03:36,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-18 13:03:36,028 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-18 13:03:36,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:36,029 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-18 13:03:36,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 13:03:36,029 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-18 13:03:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 13:03:36,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:36,030 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:36,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 13:03:36,030 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:36,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:36,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-18 13:03:36,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:36,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020065825] [2020-08-18 13:03:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:36,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:36,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 13:03:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:36,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 13:03:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:36,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020065825] [2020-08-18 13:03:36,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:36,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 13:03:36,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129675113] [2020-08-18 13:03:36,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 13:03:36,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:36,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 13:03:36,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-18 13:03:36,374 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-18 13:03:37,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:37,624 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-18 13:03:37,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 13:03:37,625 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-18 13:03:37,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:37,628 INFO L225 Difference]: With dead ends: 568 [2020-08-18 13:03:37,629 INFO L226 Difference]: Without dead ends: 518 [2020-08-18 13:03:37,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-08-18 13:03:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-18 13:03:37,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-18 13:03:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-18 13:03:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-18 13:03:37,639 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-18 13:03:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:37,639 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-18 13:03:37,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 13:03:37,639 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-18 13:03:37,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 13:03:37,640 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:37,640 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:37,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 13:03:37,641 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:37,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-18 13:03:37,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:37,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806534704] [2020-08-18 13:03:37,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:37,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:37,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 13:03:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:37,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 13:03:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:37,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806534704] [2020-08-18 13:03:37,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:37,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 13:03:37,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497128666] [2020-08-18 13:03:37,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 13:03:37,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:37,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 13:03:37,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-18 13:03:37,967 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-18 13:03:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:39,093 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-18 13:03:39,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 13:03:39,096 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-18 13:03:39,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:39,099 INFO L225 Difference]: With dead ends: 591 [2020-08-18 13:03:39,099 INFO L226 Difference]: Without dead ends: 541 [2020-08-18 13:03:39,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-08-18 13:03:39,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-18 13:03:39,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-18 13:03:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-18 13:03:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-18 13:03:39,113 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-18 13:03:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:39,113 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-18 13:03:39,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 13:03:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-18 13:03:39,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-18 13:03:39,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:39,114 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:39,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 13:03:39,114 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-18 13:03:39,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:39,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797615650] [2020-08-18 13:03:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:39,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:39,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:03:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:39,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 13:03:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:39,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797615650] [2020-08-18 13:03:39,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:39,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 13:03:39,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489385612] [2020-08-18 13:03:39,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 13:03:39,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:39,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 13:03:39,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-18 13:03:39,528 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-18 13:03:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:40,729 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-18 13:03:40,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 13:03:40,730 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-18 13:03:40,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:40,733 INFO L225 Difference]: With dead ends: 614 [2020-08-18 13:03:40,733 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 13:03:40,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-08-18 13:03:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 13:03:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-18 13:03:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 13:03:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-18 13:03:40,744 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-18 13:03:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:40,745 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-18 13:03:40,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 13:03:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-18 13:03:40,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 13:03:40,746 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:40,746 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:40,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 13:03:40,746 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:40,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-18 13:03:40,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:40,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363176010] [2020-08-18 13:03:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:41,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:41,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 13:03:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:41,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 13:03:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:41,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363176010] [2020-08-18 13:03:41,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:41,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 13:03:41,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015484674] [2020-08-18 13:03:41,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 13:03:41,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:41,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 13:03:41,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-18 13:03:41,192 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-18 13:03:43,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:43,131 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-18 13:03:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 13:03:43,132 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-18 13:03:43,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:43,137 INFO L225 Difference]: With dead ends: 637 [2020-08-18 13:03:43,137 INFO L226 Difference]: Without dead ends: 587 [2020-08-18 13:03:43,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-18 13:03:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-18 13:03:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-18 13:03:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-18 13:03:43,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-18 13:03:43,154 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-18 13:03:43,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:43,154 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-18 13:03:43,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 13:03:43,155 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-18 13:03:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 13:03:43,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:43,157 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:43,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 13:03:43,157 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:43,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-18 13:03:43,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:43,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775845997] [2020-08-18 13:03:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:43,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:43,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 13:03:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:43,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 13:03:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:43,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775845997] [2020-08-18 13:03:43,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:43,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 13:03:43,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066870835] [2020-08-18 13:03:43,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 13:03:43,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:43,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 13:03:43,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-18 13:03:43,747 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-18 13:03:45,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:45,690 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-18 13:03:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 13:03:45,690 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-18 13:03:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:45,693 INFO L225 Difference]: With dead ends: 660 [2020-08-18 13:03:45,693 INFO L226 Difference]: Without dead ends: 610 [2020-08-18 13:03:45,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-18 13:03:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-18 13:03:45,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-18 13:03:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-18 13:03:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-18 13:03:45,704 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-18 13:03:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:45,704 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-18 13:03:45,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 13:03:45,705 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-18 13:03:45,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-18 13:03:45,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:45,706 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:45,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 13:03:45,706 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:45,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:45,706 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-18 13:03:45,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:45,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229151442] [2020-08-18 13:03:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:46,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:46,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 13:03:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:46,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:03:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:46,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229151442] [2020-08-18 13:03:46,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:46,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 13:03:46,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72555384] [2020-08-18 13:03:46,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 13:03:46,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:46,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 13:03:46,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-18 13:03:46,176 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-18 13:03:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:47,941 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-18 13:03:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-18 13:03:47,942 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-18 13:03:47,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:47,946 INFO L225 Difference]: With dead ends: 683 [2020-08-18 13:03:47,946 INFO L226 Difference]: Without dead ends: 633 [2020-08-18 13:03:47,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-18 13:03:47,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-18 13:03:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-18 13:03:47,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-18 13:03:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-18 13:03:47,957 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-18 13:03:47,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:47,957 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-18 13:03:47,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 13:03:47,958 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-18 13:03:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 13:03:47,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:47,959 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:47,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 13:03:47,959 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:47,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-18 13:03:47,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:47,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502478934] [2020-08-18 13:03:47,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:48,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:48,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 13:03:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:48,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 13:03:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:48,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502478934] [2020-08-18 13:03:48,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:48,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 13:03:48,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663969163] [2020-08-18 13:03:48,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 13:03:48,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:48,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 13:03:48,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-18 13:03:48,394 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-18 13:03:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:50,257 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-18 13:03:50,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 13:03:50,258 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-18 13:03:50,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:50,260 INFO L225 Difference]: With dead ends: 706 [2020-08-18 13:03:50,260 INFO L226 Difference]: Without dead ends: 656 [2020-08-18 13:03:50,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-08-18 13:03:50,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-18 13:03:50,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-18 13:03:50,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-18 13:03:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-18 13:03:50,272 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-18 13:03:50,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:50,272 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-18 13:03:50,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 13:03:50,272 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-18 13:03:50,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 13:03:50,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:50,273 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:50,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 13:03:50,273 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:50,274 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-18 13:03:50,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:50,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553105513] [2020-08-18 13:03:50,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:50,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:50,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 13:03:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:50,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 13:03:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:50,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553105513] [2020-08-18 13:03:50,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:50,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-18 13:03:50,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967935723] [2020-08-18 13:03:50,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-18 13:03:50,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:50,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-18 13:03:50,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-18 13:03:50,781 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-18 13:03:52,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:52,766 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-18 13:03:52,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 13:03:52,766 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-18 13:03:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:52,770 INFO L225 Difference]: With dead ends: 729 [2020-08-18 13:03:52,770 INFO L226 Difference]: Without dead ends: 679 [2020-08-18 13:03:52,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 13:03:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-18 13:03:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-18 13:03:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-18 13:03:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-18 13:03:52,780 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-18 13:03:52,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:52,780 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-18 13:03:52,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-18 13:03:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-18 13:03:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 13:03:52,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:52,782 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:52,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 13:03:52,782 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:52,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:52,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-18 13:03:52,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:52,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628491246] [2020-08-18 13:03:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:53,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:53,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 13:03:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:53,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 13:03:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:03:53,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628491246] [2020-08-18 13:03:53,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:53,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-18 13:03:53,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381008272] [2020-08-18 13:03:53,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-18 13:03:53,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:53,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-18 13:03:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-18 13:03:53,290 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-18 13:03:54,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:54,934 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-18 13:03:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-18 13:03:54,934 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-18 13:03:54,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:54,937 INFO L225 Difference]: With dead ends: 752 [2020-08-18 13:03:54,937 INFO L226 Difference]: Without dead ends: 702 [2020-08-18 13:03:54,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 13:03:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-18 13:03:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-18 13:03:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-18 13:03:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-18 13:03:54,948 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-18 13:03:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:54,948 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-18 13:03:54,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-18 13:03:54,949 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-18 13:03:54,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 13:03:54,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:54,950 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:54,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 13:03:54,950 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:54,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:54,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-18 13:03:54,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:54,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410718242] [2020-08-18 13:03:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:03:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 13:03:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-18 13:03:55,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410718242] [2020-08-18 13:03:55,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:03:55,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 13:03:55,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328260014] [2020-08-18 13:03:55,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:03:55,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:55,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:03:55,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:03:55,021 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-18 13:03:55,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:55,156 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-18 13:03:55,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 13:03:55,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-18 13:03:55,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:55,158 INFO L225 Difference]: With dead ends: 177 [2020-08-18 13:03:55,158 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 13:03:55,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 13:03:55,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 13:03:55,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-18 13:03:55,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-18 13:03:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-18 13:03:55,166 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-18 13:03:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:55,166 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-18 13:03:55,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:03:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-18 13:03:55,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 13:03:55,169 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:55,169 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:55,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 13:03:55,170 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:55,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:55,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-18 13:03:55,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:55,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104865510] [2020-08-18 13:03:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 13:03:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 13:03:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-18 13:03:55,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104865510] [2020-08-18 13:03:55,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:03:55,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 13:03:55,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382280376] [2020-08-18 13:03:55,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 13:03:55,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:55,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 13:03:55,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 13:03:55,240 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-18 13:03:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:55,400 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-18 13:03:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 13:03:55,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-18 13:03:55,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:55,407 INFO L225 Difference]: With dead ends: 200 [2020-08-18 13:03:55,407 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 13:03:55,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:03:55,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 13:03:55,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-18 13:03:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-18 13:03:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-18 13:03:55,415 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-18 13:03:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:55,415 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-18 13:03:55,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 13:03:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-18 13:03:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 13:03:55,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:55,417 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:55,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 13:03:55,417 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:55,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:55,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-18 13:03:55,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:55,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407286666] [2020-08-18 13:03:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 13:03:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 13:03:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-18 13:03:55,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407286666] [2020-08-18 13:03:55,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:03:55,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 13:03:55,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163514534] [2020-08-18 13:03:55,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 13:03:55,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:55,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 13:03:55,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 13:03:55,511 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-18 13:03:55,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:55,647 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-18 13:03:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 13:03:55,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-18 13:03:55,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:55,648 INFO L225 Difference]: With dead ends: 187 [2020-08-18 13:03:55,648 INFO L226 Difference]: Without dead ends: 139 [2020-08-18 13:03:55,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 13:03:55,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-18 13:03:55,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-18 13:03:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 13:03:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-18 13:03:55,655 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-18 13:03:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:55,656 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-18 13:03:55,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 13:03:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-18 13:03:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 13:03:55,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:03:55,657 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:03:55,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 13:03:55,658 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:03:55,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:03:55,658 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-18 13:03:55,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:03:55,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487025486] [2020-08-18 13:03:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:03:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:03:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 13:03:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 13:03:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:03:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-18 13:03:55,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487025486] [2020-08-18 13:03:55,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:03:55,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 13:03:55,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324252275] [2020-08-18 13:03:55,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 13:03:55,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:03:55,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 13:03:55,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:03:55,757 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-18 13:03:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:03:55,910 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-18 13:03:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 13:03:55,911 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-18 13:03:55,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:03:55,912 INFO L225 Difference]: With dead ends: 157 [2020-08-18 13:03:55,912 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 13:03:55,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-18 13:03:55,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 13:03:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 13:03:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 13:03:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 13:03:55,914 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-18 13:03:55,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:03:55,914 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 13:03:55,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 13:03:55,914 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 13:03:55,915 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 13:03:55,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 13:03:55,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 13:03:56,179 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-18 13:03:56,179 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-18 13:03:56,179 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-18 13:03:56,179 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-18 13:03:56,179 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-18 13:03:56,179 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (and (<= 0 elem_exists_~i~0) (= elem_exists_~size |elem_exists_#in~size|)) [2020-08-18 13:03:56,179 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-18 13:03:56,180 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 13:03:56,180 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-18 13:03:56,180 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 13:03:56,180 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-18 13:03:56,180 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-18 13:03:56,180 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-18 13:03:56,180 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 13:03:56,180 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 13:03:56,180 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 13:03:56,181 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 13:03:56,181 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-18 13:03:56,181 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-18 13:03:56,181 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-18 13:03:56,181 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-18 13:03:56,181 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 13:03:56,181 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-18 13:03:56,181 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 13:03:56,182 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-18 13:03:56,182 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-18 13:03:56,182 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 13:03:56,183 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-18 13:03:56,183 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-18 13:03:56,183 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-18 13:03:56,184 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-18 13:03:56,184 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-18 13:03:56,184 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-18 13:03:56,184 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-18 13:03:56,184 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-18 13:03:56,184 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-18 13:03:56,184 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-18 13:03:56,184 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-18 13:03:56,185 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-18 13:03:56,185 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-18 13:03:56,185 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-18 13:03:56,186 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-18 13:03:56,186 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 13:03:56,186 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-18 13:03:56,186 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 13:03:56,186 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-18 13:03:56,186 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-18 13:03:56,187 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-18 13:03:56,187 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-18 13:03:56,188 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 13:03:56,188 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-18 13:03:56,188 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-18 13:03:56,188 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-18 13:03:56,188 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-18 13:03:56,188 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-18 13:03:56,189 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-18 13:03:56,189 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-18 13:03:56,189 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-18 13:03:56,189 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-18 13:03:56,189 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-18 13:03:56,190 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-18 13:03:56,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 01:03:56 BoogieIcfgContainer [2020-08-18 13:03:56,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 13:03:56,211 INFO L168 Benchmark]: Toolchain (without parser) took 37308.85 ms. Allocated memory was 140.5 MB in the beginning and 487.1 MB in the end (delta: 346.6 MB). Free memory was 103.8 MB in the beginning and 422.8 MB in the end (delta: -319.0 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. [2020-08-18 13:03:56,212 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 13:03:56,212 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.11 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 103.6 MB in the beginning and 182.7 MB in the end (delta: -79.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-08-18 13:03:56,213 INFO L168 Benchmark]: Boogie Preprocessor took 50.66 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 180.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-18 13:03:56,213 INFO L168 Benchmark]: RCFGBuilder took 479.86 ms. Allocated memory is still 203.9 MB. Free memory was 180.3 MB in the beginning and 156.4 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-08-18 13:03:56,214 INFO L168 Benchmark]: TraceAbstraction took 36431.84 ms. Allocated memory was 203.9 MB in the beginning and 487.1 MB in the end (delta: 283.1 MB). Free memory was 155.8 MB in the beginning and 422.8 MB in the end (delta: -267.0 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2020-08-18 13:03:56,216 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 340.11 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 103.6 MB in the beginning and 182.7 MB in the end (delta: -79.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 50.66 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 180.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 479.86 ms. Allocated memory is still 203.9 MB. Free memory was 180.3 MB in the beginning and 156.4 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 36431.84 ms. Allocated memory was 203.9 MB in the beginning and 487.1 MB in the end (delta: 283.1 MB). Free memory was 155.8 MB in the beginning and 422.8 MB in the end (delta: -267.0 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n == 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 <= i && size == \old(size) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 36.0s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 27.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 33 MinimizatonAttempts, 8700 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 250 PreInvPairs, 290 NumberOfFragments, 81 HoareAnnotationTreeSize, 250 FomulaSimplifications, 452 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 22 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.6s InterpolantComputationTime, 1992 NumberOfCodeBlocks, 1992 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1959 ConstructedInterpolants, 0 QuantifiedInterpolants, 278362 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 3160/10091 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 correct! Received shutdown request...