/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:40:04,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:40:04,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:40:04,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:40:04,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:40:04,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:40:04,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:40:04,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:40:04,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:40:04,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:40:04,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:40:04,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:40:04,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:40:04,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:40:04,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:40:04,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:40:04,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:40:04,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:40:04,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:40:04,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:40:04,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:40:04,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:40:04,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:40:04,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:40:04,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 23:40:04,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:40:04,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:40:04,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:40:04,846 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 23:40:04,890 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:40:04,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:40:04,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:40:04,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:40:04,893 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:40:04,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:40:04,894 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:40:04,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:40:04,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:40:04,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:40:04,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:40:04,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:40:04,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:40:04,897 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:40:04,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:40:04,897 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:40:04,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:40:04,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:40:04,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:40:04,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:40:04,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:40:04,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:40:04,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:40:04,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:40:04,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:40:04,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:40:04,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:40:04,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:40:04,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:40:04,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:40:05,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:40:05,215 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:40:05,219 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:40:05,220 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:40:05,221 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:40:05,222 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i [2020-08-18 23:40:05,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34592b5ff/b0b4345ed3cb4936b9d2dfdc8b03c1d6/FLAG1d2e5a769 [2020-08-18 23:40:05,727 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:40:05,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_1_variant.i [2020-08-18 23:40:05,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34592b5ff/b0b4345ed3cb4936b9d2dfdc8b03c1d6/FLAG1d2e5a769 [2020-08-18 23:40:06,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34592b5ff/b0b4345ed3cb4936b9d2dfdc8b03c1d6 [2020-08-18 23:40:06,147 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:40:06,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:40:06,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:40:06,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:40:06,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:40:06,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:40:06" (1/1) ... [2020-08-18 23:40:06,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49cc5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:40:06, skipping insertion in model container [2020-08-18 23:40:06,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:40:06" (1/1) ... [2020-08-18 23:40:06,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:40:06,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:40:06,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:40:06,391 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:40:06,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:40:06,415 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:40:06,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:40:06 WrapperNode [2020-08-18 23:40:06,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:40:06,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:40:06,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:40:06,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:40:06,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:40:06" (1/1) ... [2020-08-18 23:40:06,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:40:06" (1/1) ... [2020-08-18 23:40:06,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:40:06" (1/1) ... [2020-08-18 23:40:06,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:40:06" (1/1) ... [2020-08-18 23:40:06,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:40:06" (1/1) ... [2020-08-18 23:40:06,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:40:06" (1/1) ... [2020-08-18 23:40:06,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:40:06" (1/1) ... [2020-08-18 23:40:06,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:40:06,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:40:06,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:40:06,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:40:06,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:40:06" (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 23:40:06,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:40:06,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:40:06,595 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 23:40:06,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 23:40:06,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:40:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:40:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 23:40:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 23:40:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 23:40:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 23:40:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:40:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:40:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:40:06,770 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:40:06,771 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 23:40:06,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:40:06 BoogieIcfgContainer [2020-08-18 23:40:06,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:40:06,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:40:06,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:40:06,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:40:06,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:40:06" (1/3) ... [2020-08-18 23:40:06,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92d4286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:40:06, skipping insertion in model container [2020-08-18 23:40:06,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:40:06" (2/3) ... [2020-08-18 23:40:06,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92d4286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:40:06, skipping insertion in model container [2020-08-18 23:40:06,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:40:06" (3/3) ... [2020-08-18 23:40:06,811 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i [2020-08-18 23:40:06,844 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:40:06,862 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:40:06,894 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:40:06,922 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:40:06,923 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:40:06,923 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:40:06,923 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:40:06,923 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:40:06,923 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:40:06,924 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:40:06,924 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:40:06,938 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 23:40:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 23:40:06,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:06,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:06,945 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:06,951 INFO L82 PathProgramCache]: Analyzing trace with hash 651998901, now seen corresponding path program 1 times [2020-08-18 23:40:06,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:06,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395957958] [2020-08-18 23:40:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,164 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 23:40:07,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395957958] [2020-08-18 23:40:07,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:40:07,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:40:07,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068490809] [2020-08-18 23:40:07,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:40:07,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:07,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:40:07,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:40:07,190 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-08-18 23:40:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:07,286 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-08-18 23:40:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 23:40:07,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 23:40:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:07,296 INFO L225 Difference]: With dead ends: 40 [2020-08-18 23:40:07,297 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 23:40:07,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:40:07,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 23:40:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-18 23:40:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 23:40:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-08-18 23:40:07,340 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2020-08-18 23:40:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:07,341 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-08-18 23:40:07,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:40:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-08-18 23:40:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 23:40:07,342 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:07,342 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:07,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:40:07,343 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:07,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:07,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1822329080, now seen corresponding path program 1 times [2020-08-18 23:40:07,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:07,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18944471] [2020-08-18 23:40:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:40:07,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18944471] [2020-08-18 23:40:07,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:07,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 23:40:07,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009818328] [2020-08-18 23:40:07,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 23:40:07,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:07,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 23:40:07,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:40:07,438 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2020-08-18 23:40:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:07,511 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-08-18 23:40:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 23:40:07,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-18 23:40:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:07,513 INFO L225 Difference]: With dead ends: 30 [2020-08-18 23:40:07,514 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 23:40:07,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 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 23:40:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 23:40:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-18 23:40:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 23:40:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-08-18 23:40:07,523 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2020-08-18 23:40:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:07,524 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-08-18 23:40:07,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 23:40:07,524 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-08-18 23:40:07,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 23:40:07,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:07,525 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:07,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:40:07,526 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:07,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:07,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1510359893, now seen corresponding path program 2 times [2020-08-18 23:40:07,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:07,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498376293] [2020-08-18 23:40:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 23:40:07,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498376293] [2020-08-18 23:40:07,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:07,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 23:40:07,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287551303] [2020-08-18 23:40:07,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 23:40:07,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:07,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 23:40:07,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 23:40:07,642 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 7 states. [2020-08-18 23:40:07,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:07,708 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-08-18 23:40:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 23:40:07,709 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-18 23:40:07,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:07,710 INFO L225 Difference]: With dead ends: 37 [2020-08-18 23:40:07,710 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 23:40:07,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:40:07,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 23:40:07,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-08-18 23:40:07,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 23:40:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-08-18 23:40:07,719 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-08-18 23:40:07,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:07,720 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-08-18 23:40:07,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 23:40:07,720 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-08-18 23:40:07,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 23:40:07,721 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:07,721 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:07,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:40:07,722 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:07,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1096709736, now seen corresponding path program 3 times [2020-08-18 23:40:07,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:07,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304211195] [2020-08-18 23:40:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 23:40:07,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304211195] [2020-08-18 23:40:07,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:07,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 23:40:07,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736626955] [2020-08-18 23:40:07,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 23:40:07,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:07,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 23:40:07,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:40:07,892 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 8 states. [2020-08-18 23:40:08,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:08,016 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-08-18 23:40:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 23:40:08,017 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 23:40:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:08,018 INFO L225 Difference]: With dead ends: 44 [2020-08-18 23:40:08,018 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 23:40:08,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:40:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 23:40:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-18 23:40:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 23:40:08,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-08-18 23:40:08,027 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 31 [2020-08-18 23:40:08,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:08,028 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-08-18 23:40:08,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 23:40:08,028 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-08-18 23:40:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 23:40:08,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:08,031 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:08,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:40:08,032 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:08,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:08,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2024617973, now seen corresponding path program 4 times [2020-08-18 23:40:08,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:08,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332804541] [2020-08-18 23:40:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-18 23:40:08,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332804541] [2020-08-18 23:40:08,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:08,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 23:40:08,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687236272] [2020-08-18 23:40:08,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 23:40:08,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:08,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 23:40:08,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:40:08,162 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 9 states. [2020-08-18 23:40:08,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:08,254 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-08-18 23:40:08,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 23:40:08,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-18 23:40:08,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:08,259 INFO L225 Difference]: With dead ends: 51 [2020-08-18 23:40:08,259 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 23:40:08,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:40:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 23:40:08,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-08-18 23:40:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 23:40:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-08-18 23:40:08,273 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 38 [2020-08-18 23:40:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:08,273 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-08-18 23:40:08,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 23:40:08,273 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-08-18 23:40:08,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 23:40:08,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:08,275 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:08,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:40:08,275 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:08,276 INFO L82 PathProgramCache]: Analyzing trace with hash 125373896, now seen corresponding path program 5 times [2020-08-18 23:40:08,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:08,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091033317] [2020-08-18 23:40:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 23:40:08,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091033317] [2020-08-18 23:40:08,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:08,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 23:40:08,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382470125] [2020-08-18 23:40:08,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 23:40:08,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:08,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 23:40:08,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:40:08,390 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 10 states. [2020-08-18 23:40:08,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:08,483 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-08-18 23:40:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 23:40:08,484 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-08-18 23:40:08,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:08,485 INFO L225 Difference]: With dead ends: 58 [2020-08-18 23:40:08,485 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 23:40:08,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:40:08,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 23:40:08,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-18 23:40:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 23:40:08,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-08-18 23:40:08,495 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 45 [2020-08-18 23:40:08,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:08,496 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-08-18 23:40:08,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 23:40:08,496 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-08-18 23:40:08,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 23:40:08,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:08,498 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:08,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:40:08,498 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:08,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:08,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1195086997, now seen corresponding path program 6 times [2020-08-18 23:40:08,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:08,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138564210] [2020-08-18 23:40:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-18 23:40:08,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138564210] [2020-08-18 23:40:08,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:08,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 23:40:08,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96309954] [2020-08-18 23:40:08,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 23:40:08,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:08,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 23:40:08,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:40:08,679 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 11 states. [2020-08-18 23:40:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:08,765 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-08-18 23:40:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 23:40:08,765 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-08-18 23:40:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:08,767 INFO L225 Difference]: With dead ends: 65 [2020-08-18 23:40:08,767 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 23:40:08,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-18 23:40:08,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 23:40:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-08-18 23:40:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 23:40:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-08-18 23:40:08,777 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 52 [2020-08-18 23:40:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:08,778 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-08-18 23:40:08,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 23:40:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-08-18 23:40:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 23:40:08,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:08,780 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:08,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 23:40:08,781 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:08,781 INFO L82 PathProgramCache]: Analyzing trace with hash 906444072, now seen corresponding path program 7 times [2020-08-18 23:40:08,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:08,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953398230] [2020-08-18 23:40:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 14 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-18 23:40:08,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953398230] [2020-08-18 23:40:08,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:08,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 23:40:08,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314976366] [2020-08-18 23:40:08,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 23:40:08,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:08,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 23:40:08,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 23:40:08,935 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 12 states. [2020-08-18 23:40:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:09,083 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-08-18 23:40:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 23:40:09,084 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-08-18 23:40:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:09,085 INFO L225 Difference]: With dead ends: 72 [2020-08-18 23:40:09,086 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 23:40:09,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:40:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 23:40:09,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-18 23:40:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 23:40:09,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-08-18 23:40:09,095 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 59 [2020-08-18 23:40:09,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:09,096 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-08-18 23:40:09,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 23:40:09,096 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-08-18 23:40:09,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 23:40:09,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:09,097 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:09,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 23:40:09,098 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:09,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:09,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2003085003, now seen corresponding path program 8 times [2020-08-18 23:40:09,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:09,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391634055] [2020-08-18 23:40:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-08-18 23:40:09,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391634055] [2020-08-18 23:40:09,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:09,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 23:40:09,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577822092] [2020-08-18 23:40:09,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 23:40:09,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:09,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 23:40:09,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:40:09,249 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 13 states. [2020-08-18 23:40:09,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:09,380 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-08-18 23:40:09,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 23:40:09,380 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-08-18 23:40:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:09,382 INFO L225 Difference]: With dead ends: 79 [2020-08-18 23:40:09,382 INFO L226 Difference]: Without dead ends: 77 [2020-08-18 23:40:09,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-08-18 23:40:09,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-18 23:40:09,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-08-18 23:40:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 23:40:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-08-18 23:40:09,400 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 66 [2020-08-18 23:40:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:09,401 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-08-18 23:40:09,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 23:40:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-08-18 23:40:09,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 23:40:09,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:09,407 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:09,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 23:40:09,408 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:09,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:09,408 INFO L82 PathProgramCache]: Analyzing trace with hash -824245112, now seen corresponding path program 9 times [2020-08-18 23:40:09,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:09,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100163175] [2020-08-18 23:40:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 18 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-18 23:40:09,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100163175] [2020-08-18 23:40:09,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:09,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 23:40:09,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927904763] [2020-08-18 23:40:09,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 23:40:09,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:09,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 23:40:09,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 23:40:09,610 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 14 states. [2020-08-18 23:40:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:09,739 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-08-18 23:40:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 23:40:09,739 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-08-18 23:40:09,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:09,742 INFO L225 Difference]: With dead ends: 86 [2020-08-18 23:40:09,742 INFO L226 Difference]: Without dead ends: 84 [2020-08-18 23:40:09,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-08-18 23:40:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-18 23:40:09,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-08-18 23:40:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 23:40:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-08-18 23:40:09,756 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 73 [2020-08-18 23:40:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:09,756 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-08-18 23:40:09,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 23:40:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-08-18 23:40:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-18 23:40:09,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:09,761 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:09,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 23:40:09,762 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:09,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:09,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1640593963, now seen corresponding path program 10 times [2020-08-18 23:40:09,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:09,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675806821] [2020-08-18 23:40:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-08-18 23:40:09,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675806821] [2020-08-18 23:40:09,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:09,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 23:40:09,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488197168] [2020-08-18 23:40:09,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 23:40:09,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:09,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 23:40:09,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 23:40:09,949 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 15 states. [2020-08-18 23:40:10,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:10,074 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-08-18 23:40:10,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 23:40:10,074 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-08-18 23:40:10,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:10,076 INFO L225 Difference]: With dead ends: 93 [2020-08-18 23:40:10,076 INFO L226 Difference]: Without dead ends: 91 [2020-08-18 23:40:10,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-18 23:40:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-18 23:40:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-08-18 23:40:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-18 23:40:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2020-08-18 23:40:10,092 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 80 [2020-08-18 23:40:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:10,096 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2020-08-18 23:40:10,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 23:40:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2020-08-18 23:40:10,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 23:40:10,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:10,097 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:10,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 23:40:10,101 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:10,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:10,102 INFO L82 PathProgramCache]: Analyzing trace with hash -447323160, now seen corresponding path program 11 times [2020-08-18 23:40:10,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:10,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256880467] [2020-08-18 23:40:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 22 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-18 23:40:10,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256880467] [2020-08-18 23:40:10,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:10,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 23:40:10,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793766341] [2020-08-18 23:40:10,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 23:40:10,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:10,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 23:40:10,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 23:40:10,307 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 16 states. [2020-08-18 23:40:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:10,434 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-08-18 23:40:10,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 23:40:10,435 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-18 23:40:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:10,436 INFO L225 Difference]: With dead ends: 100 [2020-08-18 23:40:10,436 INFO L226 Difference]: Without dead ends: 98 [2020-08-18 23:40:10,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2020-08-18 23:40:10,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-18 23:40:10,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-08-18 23:40:10,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-18 23:40:10,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-08-18 23:40:10,444 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 87 [2020-08-18 23:40:10,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:10,445 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-08-18 23:40:10,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 23:40:10,445 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-08-18 23:40:10,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-18 23:40:10,446 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:10,446 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:10,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 23:40:10,447 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:10,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:10,447 INFO L82 PathProgramCache]: Analyzing trace with hash 670505589, now seen corresponding path program 12 times [2020-08-18 23:40:10,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:10,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118119142] [2020-08-18 23:40:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 24 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-18 23:40:10,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118119142] [2020-08-18 23:40:10,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:10,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 23:40:10,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914895449] [2020-08-18 23:40:10,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 23:40:10,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:10,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 23:40:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 23:40:10,673 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 17 states. [2020-08-18 23:40:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:10,837 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2020-08-18 23:40:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 23:40:10,838 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2020-08-18 23:40:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:10,839 INFO L225 Difference]: With dead ends: 107 [2020-08-18 23:40:10,839 INFO L226 Difference]: Without dead ends: 105 [2020-08-18 23:40:10,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-08-18 23:40:10,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-18 23:40:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-08-18 23:40:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 23:40:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-08-18 23:40:10,847 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 94 [2020-08-18 23:40:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:10,848 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-08-18 23:40:10,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 23:40:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-08-18 23:40:10,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-18 23:40:10,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:10,849 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:10,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 23:40:10,849 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:10,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:10,850 INFO L82 PathProgramCache]: Analyzing trace with hash -29140152, now seen corresponding path program 13 times [2020-08-18 23:40:10,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:10,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250706314] [2020-08-18 23:40:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 26 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-08-18 23:40:11,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250706314] [2020-08-18 23:40:11,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:11,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 23:40:11,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437072309] [2020-08-18 23:40:11,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 23:40:11,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:11,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 23:40:11,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 23:40:11,094 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 18 states. [2020-08-18 23:40:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:11,235 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-08-18 23:40:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 23:40:11,235 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-08-18 23:40:11,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:11,236 INFO L225 Difference]: With dead ends: 114 [2020-08-18 23:40:11,237 INFO L226 Difference]: Without dead ends: 112 [2020-08-18 23:40:11,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-08-18 23:40:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-18 23:40:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-08-18 23:40:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-18 23:40:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-08-18 23:40:11,247 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 101 [2020-08-18 23:40:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:11,248 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-08-18 23:40:11,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 23:40:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-08-18 23:40:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-18 23:40:11,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:11,251 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:11,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 23:40:11,251 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:11,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:11,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1538844907, now seen corresponding path program 14 times [2020-08-18 23:40:11,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:11,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726458870] [2020-08-18 23:40:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 28 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-08-18 23:40:11,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726458870] [2020-08-18 23:40:11,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:11,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 23:40:11,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099197090] [2020-08-18 23:40:11,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 23:40:11,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:11,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 23:40:11,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 23:40:11,519 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 19 states. [2020-08-18 23:40:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:11,714 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2020-08-18 23:40:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 23:40:11,715 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 108 [2020-08-18 23:40:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:11,717 INFO L225 Difference]: With dead ends: 121 [2020-08-18 23:40:11,717 INFO L226 Difference]: Without dead ends: 119 [2020-08-18 23:40:11,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-08-18 23:40:11,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-08-18 23:40:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-08-18 23:40:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-18 23:40:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-08-18 23:40:11,733 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 108 [2020-08-18 23:40:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:11,734 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-08-18 23:40:11,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 23:40:11,734 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-08-18 23:40:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 23:40:11,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:11,736 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:11,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 23:40:11,736 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:11,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1878780584, now seen corresponding path program 15 times [2020-08-18 23:40:11,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:11,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245290541] [2020-08-18 23:40:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 30 proven. 345 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-08-18 23:40:12,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245290541] [2020-08-18 23:40:12,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:12,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 23:40:12,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984336030] [2020-08-18 23:40:12,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 23:40:12,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:12,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 23:40:12,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-18 23:40:12,106 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 20 states. [2020-08-18 23:40:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:12,285 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-08-18 23:40:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 23:40:12,286 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 115 [2020-08-18 23:40:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:12,287 INFO L225 Difference]: With dead ends: 128 [2020-08-18 23:40:12,287 INFO L226 Difference]: Without dead ends: 126 [2020-08-18 23:40:12,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2020-08-18 23:40:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-18 23:40:12,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-08-18 23:40:12,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 23:40:12,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-08-18 23:40:12,298 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 115 [2020-08-18 23:40:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:12,298 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-08-18 23:40:12,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 23:40:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-08-18 23:40:12,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-18 23:40:12,300 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:12,300 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:12,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 23:40:12,301 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:12,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:12,301 INFO L82 PathProgramCache]: Analyzing trace with hash 269515701, now seen corresponding path program 16 times [2020-08-18 23:40:12,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:12,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937583620] [2020-08-18 23:40:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 32 proven. 392 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-08-18 23:40:12,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937583620] [2020-08-18 23:40:12,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:12,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 23:40:12,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304311014] [2020-08-18 23:40:12,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 23:40:12,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:12,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 23:40:12,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 23:40:12,581 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 21 states. [2020-08-18 23:40:12,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:12,785 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2020-08-18 23:40:12,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 23:40:12,786 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 122 [2020-08-18 23:40:12,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:12,788 INFO L225 Difference]: With dead ends: 135 [2020-08-18 23:40:12,788 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 23:40:12,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2020-08-18 23:40:12,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 23:40:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-08-18 23:40:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-18 23:40:12,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-08-18 23:40:12,796 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 122 [2020-08-18 23:40:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:12,796 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-08-18 23:40:12,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 23:40:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-08-18 23:40:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-08-18 23:40:12,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:12,798 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:12,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 23:40:12,799 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:12,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:12,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1034546680, now seen corresponding path program 17 times [2020-08-18 23:40:12,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:12,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634817252] [2020-08-18 23:40:12,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 34 proven. 442 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-08-18 23:40:13,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634817252] [2020-08-18 23:40:13,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:13,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 23:40:13,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805581653] [2020-08-18 23:40:13,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 23:40:13,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:13,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 23:40:13,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-18 23:40:13,225 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 22 states. [2020-08-18 23:40:13,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:13,400 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-08-18 23:40:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 23:40:13,401 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-08-18 23:40:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:13,403 INFO L225 Difference]: With dead ends: 142 [2020-08-18 23:40:13,403 INFO L226 Difference]: Without dead ends: 140 [2020-08-18 23:40:13,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-08-18 23:40:13,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-18 23:40:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-08-18 23:40:13,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-08-18 23:40:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-08-18 23:40:13,412 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 129 [2020-08-18 23:40:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:13,413 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-08-18 23:40:13,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 23:40:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-08-18 23:40:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 23:40:13,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:13,416 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:13,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 23:40:13,416 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:13,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:13,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2034415531, now seen corresponding path program 18 times [2020-08-18 23:40:13,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:13,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896780261] [2020-08-18 23:40:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 36 proven. 495 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-08-18 23:40:13,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896780261] [2020-08-18 23:40:13,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:13,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 23:40:13,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816822727] [2020-08-18 23:40:13,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 23:40:13,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:13,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 23:40:13,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 23:40:13,786 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 23 states. [2020-08-18 23:40:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:13,961 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2020-08-18 23:40:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 23:40:13,962 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 136 [2020-08-18 23:40:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:13,963 INFO L225 Difference]: With dead ends: 149 [2020-08-18 23:40:13,963 INFO L226 Difference]: Without dead ends: 147 [2020-08-18 23:40:13,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-08-18 23:40:13,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-08-18 23:40:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-08-18 23:40:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-18 23:40:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2020-08-18 23:40:13,974 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 136 [2020-08-18 23:40:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:13,974 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2020-08-18 23:40:13,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 23:40:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2020-08-18 23:40:13,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-18 23:40:13,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:13,977 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:13,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 23:40:13,977 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:13,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:13,978 INFO L82 PathProgramCache]: Analyzing trace with hash 245879144, now seen corresponding path program 19 times [2020-08-18 23:40:13,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:13,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925495889] [2020-08-18 23:40:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 38 proven. 551 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-08-18 23:40:14,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925495889] [2020-08-18 23:40:14,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:14,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 23:40:14,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235815386] [2020-08-18 23:40:14,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 23:40:14,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:14,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 23:40:14,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-18 23:40:14,327 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 24 states. [2020-08-18 23:40:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:14,603 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-08-18 23:40:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 23:40:14,604 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 143 [2020-08-18 23:40:14,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:14,606 INFO L225 Difference]: With dead ends: 156 [2020-08-18 23:40:14,606 INFO L226 Difference]: Without dead ends: 154 [2020-08-18 23:40:14,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2020-08-18 23:40:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-18 23:40:14,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-08-18 23:40:14,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-08-18 23:40:14,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-08-18 23:40:14,617 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 143 [2020-08-18 23:40:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:14,618 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-08-18 23:40:14,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 23:40:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-08-18 23:40:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 23:40:14,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:14,621 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:14,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 23:40:14,621 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:14,622 INFO L82 PathProgramCache]: Analyzing trace with hash -499680011, now seen corresponding path program 20 times [2020-08-18 23:40:14,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:14,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581434022] [2020-08-18 23:40:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 40 proven. 610 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-08-18 23:40:15,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581434022] [2020-08-18 23:40:15,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:15,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 23:40:15,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094091622] [2020-08-18 23:40:15,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 23:40:15,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:15,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 23:40:15,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-18 23:40:15,157 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 25 states. [2020-08-18 23:40:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:15,374 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2020-08-18 23:40:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 23:40:15,374 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 150 [2020-08-18 23:40:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:15,376 INFO L225 Difference]: With dead ends: 163 [2020-08-18 23:40:15,376 INFO L226 Difference]: Without dead ends: 161 [2020-08-18 23:40:15,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2020-08-18 23:40:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-08-18 23:40:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-08-18 23:40:15,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-18 23:40:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2020-08-18 23:40:15,389 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 150 [2020-08-18 23:40:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:15,391 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2020-08-18 23:40:15,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 23:40:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2020-08-18 23:40:15,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-18 23:40:15,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:15,394 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:15,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 23:40:15,394 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:15,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:15,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1606887624, now seen corresponding path program 21 times [2020-08-18 23:40:15,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:15,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298435754] [2020-08-18 23:40:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 42 proven. 672 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-08-18 23:40:15,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298435754] [2020-08-18 23:40:15,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:15,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 23:40:15,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075018190] [2020-08-18 23:40:15,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 23:40:15,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:15,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 23:40:15,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-18 23:40:15,813 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 26 states. [2020-08-18 23:40:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:16,054 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-08-18 23:40:16,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 23:40:16,056 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 157 [2020-08-18 23:40:16,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:16,058 INFO L225 Difference]: With dead ends: 170 [2020-08-18 23:40:16,058 INFO L226 Difference]: Without dead ends: 168 [2020-08-18 23:40:16,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2020-08-18 23:40:16,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-18 23:40:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-08-18 23:40:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-18 23:40:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-08-18 23:40:16,066 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 157 [2020-08-18 23:40:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:16,067 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-08-18 23:40:16,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 23:40:16,067 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-08-18 23:40:16,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-08-18 23:40:16,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:16,070 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:16,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 23:40:16,070 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:16,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:16,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1525225877, now seen corresponding path program 22 times [2020-08-18 23:40:16,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:16,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343922565] [2020-08-18 23:40:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:16,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 44 proven. 737 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-08-18 23:40:16,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343922565] [2020-08-18 23:40:16,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:16,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 23:40:16,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792039076] [2020-08-18 23:40:16,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 23:40:16,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:16,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 23:40:16,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-18 23:40:16,539 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 27 states. [2020-08-18 23:40:16,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:16,823 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2020-08-18 23:40:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 23:40:16,824 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 164 [2020-08-18 23:40:16,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:16,825 INFO L225 Difference]: With dead ends: 177 [2020-08-18 23:40:16,826 INFO L226 Difference]: Without dead ends: 175 [2020-08-18 23:40:16,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2020-08-18 23:40:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-08-18 23:40:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-08-18 23:40:16,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-18 23:40:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2020-08-18 23:40:16,834 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 164 [2020-08-18 23:40:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:16,834 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2020-08-18 23:40:16,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 23:40:16,834 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2020-08-18 23:40:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-08-18 23:40:16,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:16,836 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:16,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 23:40:16,837 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:16,837 INFO L82 PathProgramCache]: Analyzing trace with hash 302651432, now seen corresponding path program 23 times [2020-08-18 23:40:16,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:16,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382717704] [2020-08-18 23:40:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 46 proven. 805 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-08-18 23:40:17,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382717704] [2020-08-18 23:40:17,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:17,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 23:40:17,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59460702] [2020-08-18 23:40:17,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 23:40:17,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:17,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 23:40:17,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-18 23:40:17,347 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 28 states. [2020-08-18 23:40:17,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:17,595 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2020-08-18 23:40:17,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 23:40:17,596 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 171 [2020-08-18 23:40:17,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:17,597 INFO L225 Difference]: With dead ends: 184 [2020-08-18 23:40:17,597 INFO L226 Difference]: Without dead ends: 182 [2020-08-18 23:40:17,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2020-08-18 23:40:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-08-18 23:40:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-08-18 23:40:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-08-18 23:40:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2020-08-18 23:40:17,606 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 171 [2020-08-18 23:40:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:17,606 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2020-08-18 23:40:17,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 23:40:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2020-08-18 23:40:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-18 23:40:17,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:17,607 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:17,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 23:40:17,609 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:17,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:17,610 INFO L82 PathProgramCache]: Analyzing trace with hash 666639925, now seen corresponding path program 24 times [2020-08-18 23:40:17,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:17,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255994457] [2020-08-18 23:40:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 48 proven. 876 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-08-18 23:40:18,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255994457] [2020-08-18 23:40:18,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:18,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 23:40:18,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061397510] [2020-08-18 23:40:18,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 23:40:18,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:18,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 23:40:18,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-18 23:40:18,141 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 29 states. [2020-08-18 23:40:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:18,399 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2020-08-18 23:40:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 23:40:18,400 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 178 [2020-08-18 23:40:18,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:18,402 INFO L225 Difference]: With dead ends: 191 [2020-08-18 23:40:18,402 INFO L226 Difference]: Without dead ends: 189 [2020-08-18 23:40:18,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2020-08-18 23:40:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-18 23:40:18,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-08-18 23:40:18,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-18 23:40:18,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2020-08-18 23:40:18,415 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 178 [2020-08-18 23:40:18,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:18,416 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2020-08-18 23:40:18,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 23:40:18,416 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2020-08-18 23:40:18,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-18 23:40:18,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:18,417 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:18,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 23:40:18,418 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:18,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:18,418 INFO L82 PathProgramCache]: Analyzing trace with hash 860266376, now seen corresponding path program 25 times [2020-08-18 23:40:18,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:18,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790081043] [2020-08-18 23:40:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 50 proven. 950 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-08-18 23:40:18,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790081043] [2020-08-18 23:40:18,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:18,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 23:40:18,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101486405] [2020-08-18 23:40:18,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 23:40:18,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:18,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 23:40:18,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-18 23:40:18,971 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 30 states. [2020-08-18 23:40:19,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:19,247 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2020-08-18 23:40:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-18 23:40:19,247 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 185 [2020-08-18 23:40:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:19,249 INFO L225 Difference]: With dead ends: 198 [2020-08-18 23:40:19,249 INFO L226 Difference]: Without dead ends: 196 [2020-08-18 23:40:19,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2020-08-18 23:40:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-18 23:40:19,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-08-18 23:40:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-08-18 23:40:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2020-08-18 23:40:19,262 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 185 [2020-08-18 23:40:19,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:19,263 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2020-08-18 23:40:19,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 23:40:19,263 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2020-08-18 23:40:19,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-18 23:40:19,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:19,264 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:19,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 23:40:19,265 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash 505055957, now seen corresponding path program 26 times [2020-08-18 23:40:19,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:19,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720625951] [2020-08-18 23:40:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 52 proven. 1027 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-08-18 23:40:19,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720625951] [2020-08-18 23:40:19,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:19,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-18 23:40:19,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262896222] [2020-08-18 23:40:19,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-18 23:40:19,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:19,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-18 23:40:19,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-18 23:40:19,825 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 31 states. [2020-08-18 23:40:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:20,143 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2020-08-18 23:40:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 23:40:20,147 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 192 [2020-08-18 23:40:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:20,149 INFO L225 Difference]: With dead ends: 205 [2020-08-18 23:40:20,149 INFO L226 Difference]: Without dead ends: 203 [2020-08-18 23:40:20,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2020-08-18 23:40:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-08-18 23:40:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-08-18 23:40:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-08-18 23:40:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2020-08-18 23:40:20,159 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 192 [2020-08-18 23:40:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:20,160 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2020-08-18 23:40:20,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-18 23:40:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2020-08-18 23:40:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-08-18 23:40:20,161 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:20,161 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:20,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 23:40:20,162 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:20,162 INFO L82 PathProgramCache]: Analyzing trace with hash -489505048, now seen corresponding path program 27 times [2020-08-18 23:40:20,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:20,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495456198] [2020-08-18 23:40:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 54 proven. 1107 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-08-18 23:40:20,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495456198] [2020-08-18 23:40:20,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:20,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-18 23:40:20,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908976112] [2020-08-18 23:40:20,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-18 23:40:20,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:20,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-18 23:40:20,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-18 23:40:20,740 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 32 states. [2020-08-18 23:40:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:21,061 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2020-08-18 23:40:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 23:40:21,063 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 199 [2020-08-18 23:40:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:21,065 INFO L225 Difference]: With dead ends: 212 [2020-08-18 23:40:21,065 INFO L226 Difference]: Without dead ends: 210 [2020-08-18 23:40:21,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 23:40:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-18 23:40:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2020-08-18 23:40:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-18 23:40:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2020-08-18 23:40:21,075 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 199 [2020-08-18 23:40:21,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:21,075 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2020-08-18 23:40:21,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-18 23:40:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2020-08-18 23:40:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-08-18 23:40:21,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:21,078 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:21,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 23:40:21,078 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:21,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1374576501, now seen corresponding path program 28 times [2020-08-18 23:40:21,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:21,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651816757] [2020-08-18 23:40:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 56 proven. 1190 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-08-18 23:40:21,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651816757] [2020-08-18 23:40:21,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:21,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-18 23:40:21,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805213166] [2020-08-18 23:40:21,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-18 23:40:21,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:21,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-18 23:40:21,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 23:40:21,704 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 33 states. [2020-08-18 23:40:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:22,008 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2020-08-18 23:40:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-18 23:40:22,009 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 206 [2020-08-18 23:40:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:22,011 INFO L225 Difference]: With dead ends: 219 [2020-08-18 23:40:22,011 INFO L226 Difference]: Without dead ends: 217 [2020-08-18 23:40:22,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 23:40:22,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-08-18 23:40:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2020-08-18 23:40:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-18 23:40:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2020-08-18 23:40:22,025 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 206 [2020-08-18 23:40:22,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:22,026 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2020-08-18 23:40:22,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-18 23:40:22,026 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2020-08-18 23:40:22,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-08-18 23:40:22,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:22,039 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:22,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 23:40:22,039 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:22,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1316719032, now seen corresponding path program 29 times [2020-08-18 23:40:22,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:22,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891921135] [2020-08-18 23:40:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 58 proven. 1276 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-08-18 23:40:22,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891921135] [2020-08-18 23:40:22,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:22,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-18 23:40:22,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766944064] [2020-08-18 23:40:22,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-18 23:40:22,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:22,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-18 23:40:22,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 23:40:22,750 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand 34 states. [2020-08-18 23:40:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:23,064 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2020-08-18 23:40:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-18 23:40:23,065 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 213 [2020-08-18 23:40:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:23,067 INFO L225 Difference]: With dead ends: 226 [2020-08-18 23:40:23,067 INFO L226 Difference]: Without dead ends: 224 [2020-08-18 23:40:23,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 23:40:23,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-08-18 23:40:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2020-08-18 23:40:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-08-18 23:40:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2020-08-18 23:40:23,082 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 213 [2020-08-18 23:40:23,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:23,083 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2020-08-18 23:40:23,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-18 23:40:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2020-08-18 23:40:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-18 23:40:23,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:23,084 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:23,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 23:40:23,085 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1247699947, now seen corresponding path program 30 times [2020-08-18 23:40:23,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:23,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807143564] [2020-08-18 23:40:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 60 proven. 1365 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-08-18 23:40:23,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807143564] [2020-08-18 23:40:23,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:23,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-18 23:40:23,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093987850] [2020-08-18 23:40:23,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-18 23:40:23,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:23,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-18 23:40:23,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 23:40:23,843 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 35 states. [2020-08-18 23:40:24,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:24,178 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2020-08-18 23:40:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-18 23:40:24,181 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 220 [2020-08-18 23:40:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:24,183 INFO L225 Difference]: With dead ends: 233 [2020-08-18 23:40:24,183 INFO L226 Difference]: Without dead ends: 231 [2020-08-18 23:40:24,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 23:40:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-08-18 23:40:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2020-08-18 23:40:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-08-18 23:40:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2020-08-18 23:40:24,192 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 220 [2020-08-18 23:40:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:24,192 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2020-08-18 23:40:24,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-18 23:40:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2020-08-18 23:40:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-08-18 23:40:24,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:24,195 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:24,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 23:40:24,195 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:24,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:24,196 INFO L82 PathProgramCache]: Analyzing trace with hash 28427688, now seen corresponding path program 31 times [2020-08-18 23:40:24,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:24,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964062035] [2020-08-18 23:40:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 62 proven. 1457 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-08-18 23:40:24,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964062035] [2020-08-18 23:40:24,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:24,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-18 23:40:24,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747696916] [2020-08-18 23:40:24,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-18 23:40:24,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:24,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-18 23:40:24,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 23:40:24,948 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 36 states. [2020-08-18 23:40:25,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:25,306 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2020-08-18 23:40:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-18 23:40:25,306 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 227 [2020-08-18 23:40:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:25,308 INFO L225 Difference]: With dead ends: 240 [2020-08-18 23:40:25,308 INFO L226 Difference]: Without dead ends: 238 [2020-08-18 23:40:25,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 23:40:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-18 23:40:25,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2020-08-18 23:40:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-08-18 23:40:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2020-08-18 23:40:25,325 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 227 [2020-08-18 23:40:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:25,326 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2020-08-18 23:40:25,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-18 23:40:25,326 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2020-08-18 23:40:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-08-18 23:40:25,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:25,328 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:25,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 23:40:25,328 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:25,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:25,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1172422475, now seen corresponding path program 32 times [2020-08-18 23:40:25,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:25,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343661104] [2020-08-18 23:40:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 64 proven. 1552 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-08-18 23:40:26,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343661104] [2020-08-18 23:40:26,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:26,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-18 23:40:26,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407302856] [2020-08-18 23:40:26,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-18 23:40:26,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-18 23:40:26,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 23:40:26,136 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 37 states. [2020-08-18 23:40:26,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:26,474 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2020-08-18 23:40:26,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-18 23:40:26,474 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 234 [2020-08-18 23:40:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:26,476 INFO L225 Difference]: With dead ends: 247 [2020-08-18 23:40:26,476 INFO L226 Difference]: Without dead ends: 245 [2020-08-18 23:40:26,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 23:40:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-08-18 23:40:26,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2020-08-18 23:40:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-08-18 23:40:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2020-08-18 23:40:26,492 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 234 [2020-08-18 23:40:26,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:26,492 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2020-08-18 23:40:26,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-18 23:40:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2020-08-18 23:40:26,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-08-18 23:40:26,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:26,496 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:26,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 23:40:26,497 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:26,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:26,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1731243272, now seen corresponding path program 33 times [2020-08-18 23:40:26,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:26,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650934161] [2020-08-18 23:40:26,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 66 proven. 1650 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-08-18 23:40:27,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650934161] [2020-08-18 23:40:27,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:27,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-18 23:40:27,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774622953] [2020-08-18 23:40:27,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-18 23:40:27,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:27,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-18 23:40:27,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 23:40:27,273 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 38 states. [2020-08-18 23:40:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:27,655 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2020-08-18 23:40:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-18 23:40:27,656 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 241 [2020-08-18 23:40:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:27,658 INFO L225 Difference]: With dead ends: 254 [2020-08-18 23:40:27,658 INFO L226 Difference]: Without dead ends: 252 [2020-08-18 23:40:27,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 23:40:27,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-08-18 23:40:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2020-08-18 23:40:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-08-18 23:40:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2020-08-18 23:40:27,668 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 241 [2020-08-18 23:40:27,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:27,668 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2020-08-18 23:40:27,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-18 23:40:27,668 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2020-08-18 23:40:27,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-08-18 23:40:27,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:27,670 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:27,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-18 23:40:27,670 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:27,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:27,671 INFO L82 PathProgramCache]: Analyzing trace with hash -288469675, now seen corresponding path program 34 times [2020-08-18 23:40:27,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:27,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497817180] [2020-08-18 23:40:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 68 proven. 1751 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-08-18 23:40:28,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497817180] [2020-08-18 23:40:28,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:28,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-18 23:40:28,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012854929] [2020-08-18 23:40:28,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-18 23:40:28,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:28,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-18 23:40:28,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 23:40:28,516 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 39 states. [2020-08-18 23:40:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:28,890 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2020-08-18 23:40:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-18 23:40:28,891 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 248 [2020-08-18 23:40:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:28,892 INFO L225 Difference]: With dead ends: 261 [2020-08-18 23:40:28,893 INFO L226 Difference]: Without dead ends: 259 [2020-08-18 23:40:28,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 23:40:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-18 23:40:28,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2020-08-18 23:40:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-18 23:40:28,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 258 transitions. [2020-08-18 23:40:28,902 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 258 transitions. Word has length 248 [2020-08-18 23:40:28,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:28,902 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 258 transitions. [2020-08-18 23:40:28,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-18 23:40:28,903 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 258 transitions. [2020-08-18 23:40:28,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-08-18 23:40:28,904 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:28,905 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:28,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-18 23:40:28,905 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:28,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:28,905 INFO L82 PathProgramCache]: Analyzing trace with hash 123153512, now seen corresponding path program 35 times [2020-08-18 23:40:28,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:28,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076243636] [2020-08-18 23:40:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 70 proven. 1855 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-08-18 23:40:29,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076243636] [2020-08-18 23:40:29,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:29,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-18 23:40:29,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840312052] [2020-08-18 23:40:29,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-18 23:40:29,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:29,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-18 23:40:29,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 23:40:29,752 INFO L87 Difference]: Start difference. First operand 258 states and 258 transitions. Second operand 40 states. [2020-08-18 23:40:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:30,144 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2020-08-18 23:40:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-18 23:40:30,145 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 255 [2020-08-18 23:40:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:30,147 INFO L225 Difference]: With dead ends: 268 [2020-08-18 23:40:30,147 INFO L226 Difference]: Without dead ends: 266 [2020-08-18 23:40:30,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 23:40:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-18 23:40:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2020-08-18 23:40:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-18 23:40:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2020-08-18 23:40:30,163 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 255 [2020-08-18 23:40:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:30,164 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2020-08-18 23:40:30,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-18 23:40:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2020-08-18 23:40:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-08-18 23:40:30,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:30,167 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:30,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-18 23:40:30,167 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:30,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:30,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1583627787, now seen corresponding path program 36 times [2020-08-18 23:40:30,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:30,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245204174] [2020-08-18 23:40:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 72 proven. 1962 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-08-18 23:40:31,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245204174] [2020-08-18 23:40:31,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:31,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-18 23:40:31,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772251600] [2020-08-18 23:40:31,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-18 23:40:31,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:31,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-18 23:40:31,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 23:40:31,137 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 41 states. [2020-08-18 23:40:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:31,537 INFO L93 Difference]: Finished difference Result 275 states and 275 transitions. [2020-08-18 23:40:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-18 23:40:31,538 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 262 [2020-08-18 23:40:31,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:31,540 INFO L225 Difference]: With dead ends: 275 [2020-08-18 23:40:31,540 INFO L226 Difference]: Without dead ends: 273 [2020-08-18 23:40:31,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 23:40:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-08-18 23:40:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2020-08-18 23:40:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-08-18 23:40:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2020-08-18 23:40:31,553 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 262 [2020-08-18 23:40:31,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:31,554 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2020-08-18 23:40:31,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-18 23:40:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2020-08-18 23:40:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-08-18 23:40:31,557 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:31,557 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:31,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-18 23:40:31,558 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:31,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:31,558 INFO L82 PathProgramCache]: Analyzing trace with hash -117750840, now seen corresponding path program 37 times [2020-08-18 23:40:31,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:31,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315642742] [2020-08-18 23:40:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 74 proven. 2072 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-08-18 23:40:32,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315642742] [2020-08-18 23:40:32,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:32,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-18 23:40:32,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420298256] [2020-08-18 23:40:32,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-18 23:40:32,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:32,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-18 23:40:32,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 23:40:32,728 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 42 states. [2020-08-18 23:40:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:33,122 INFO L93 Difference]: Finished difference Result 282 states and 282 transitions. [2020-08-18 23:40:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-18 23:40:33,123 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 269 [2020-08-18 23:40:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:33,125 INFO L225 Difference]: With dead ends: 282 [2020-08-18 23:40:33,125 INFO L226 Difference]: Without dead ends: 280 [2020-08-18 23:40:33,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 23:40:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-18 23:40:33,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2020-08-18 23:40:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-08-18 23:40:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2020-08-18 23:40:33,137 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 269 [2020-08-18 23:40:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:33,138 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2020-08-18 23:40:33,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-18 23:40:33,138 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2020-08-18 23:40:33,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-08-18 23:40:33,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:33,140 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:33,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-18 23:40:33,140 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:33,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2129698453, now seen corresponding path program 38 times [2020-08-18 23:40:33,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:33,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571753754] [2020-08-18 23:40:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5073 backedges. 76 proven. 2185 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-08-18 23:40:34,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571753754] [2020-08-18 23:40:34,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:34,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-18 23:40:34,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571548075] [2020-08-18 23:40:34,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-18 23:40:34,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-18 23:40:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 23:40:34,187 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand 43 states. [2020-08-18 23:40:34,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:34,587 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2020-08-18 23:40:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-18 23:40:34,588 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 276 [2020-08-18 23:40:34,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:34,590 INFO L225 Difference]: With dead ends: 289 [2020-08-18 23:40:34,591 INFO L226 Difference]: Without dead ends: 287 [2020-08-18 23:40:34,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 23:40:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-08-18 23:40:34,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2020-08-18 23:40:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-08-18 23:40:34,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 286 transitions. [2020-08-18 23:40:34,601 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 286 transitions. Word has length 276 [2020-08-18 23:40:34,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:34,601 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 286 transitions. [2020-08-18 23:40:34,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-18 23:40:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 286 transitions. [2020-08-18 23:40:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-08-18 23:40:34,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:34,603 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:34,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-18 23:40:34,604 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:34,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1535970520, now seen corresponding path program 39 times [2020-08-18 23:40:34,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:34,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141352102] [2020-08-18 23:40:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 23:40:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5343 backedges. 78 proven. 2301 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-08-18 23:40:35,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141352102] [2020-08-18 23:40:35,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:35,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-18 23:40:35,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042879734] [2020-08-18 23:40:35,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-18 23:40:35,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:35,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-18 23:40:35,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 23:40:35,658 INFO L87 Difference]: Start difference. First operand 286 states and 286 transitions. Second operand 44 states. [2020-08-18 23:40:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:36,032 INFO L93 Difference]: Finished difference Result 296 states and 296 transitions. [2020-08-18 23:40:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-18 23:40:36,033 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 283 [2020-08-18 23:40:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:36,037 INFO L225 Difference]: With dead ends: 296 [2020-08-18 23:40:36,037 INFO L226 Difference]: Without dead ends: 294 [2020-08-18 23:40:36,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 23:40:36,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-08-18 23:40:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2020-08-18 23:40:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-08-18 23:40:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2020-08-18 23:40:36,046 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 283 [2020-08-18 23:40:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:36,047 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2020-08-18 23:40:36,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-18 23:40:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2020-08-18 23:40:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-08-18 23:40:36,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:36,049 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:36,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-18 23:40:36,049 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:36,050 INFO L82 PathProgramCache]: Analyzing trace with hash 834069301, now seen corresponding path program 40 times [2020-08-18 23:40:36,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:36,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781604695] [2020-08-18 23:40:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 23:40:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 23:40:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5620 backedges. 80 proven. 2420 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-08-18 23:40:37,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781604695] [2020-08-18 23:40:37,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:37,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-18 23:40:37,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121586221] [2020-08-18 23:40:37,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-18 23:40:37,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:37,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-18 23:40:37,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 23:40:37,127 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 45 states. [2020-08-18 23:40:37,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:37,574 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2020-08-18 23:40:37,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-18 23:40:37,574 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 290 [2020-08-18 23:40:37,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:37,577 INFO L225 Difference]: With dead ends: 303 [2020-08-18 23:40:37,577 INFO L226 Difference]: Without dead ends: 301 [2020-08-18 23:40:37,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2020-08-18 23:40:37,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-08-18 23:40:37,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 300. [2020-08-18 23:40:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-08-18 23:40:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 300 transitions. [2020-08-18 23:40:37,587 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 300 transitions. Word has length 290 [2020-08-18 23:40:37,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:37,588 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 300 transitions. [2020-08-18 23:40:37,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-18 23:40:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 300 transitions. [2020-08-18 23:40:37,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-08-18 23:40:37,590 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:37,590 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:37,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-18 23:40:37,590 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:37,591 INFO L82 PathProgramCache]: Analyzing trace with hash 596916872, now seen corresponding path program 41 times [2020-08-18 23:40:37,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:37,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349411798] [2020-08-18 23:40:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 23:40:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 23:40:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 23:40:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5904 backedges. 82 proven. 2542 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2020-08-18 23:40:38,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349411798] [2020-08-18 23:40:38,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:38,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-18 23:40:38,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948650959] [2020-08-18 23:40:38,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-18 23:40:38,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:38,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-18 23:40:38,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-08-18 23:40:38,767 INFO L87 Difference]: Start difference. First operand 300 states and 300 transitions. Second operand 46 states. [2020-08-18 23:40:39,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:39,246 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2020-08-18 23:40:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-18 23:40:39,246 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 297 [2020-08-18 23:40:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:39,249 INFO L225 Difference]: With dead ends: 310 [2020-08-18 23:40:39,249 INFO L226 Difference]: Without dead ends: 308 [2020-08-18 23:40:39,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2020-08-18 23:40:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-08-18 23:40:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2020-08-18 23:40:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-08-18 23:40:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2020-08-18 23:40:39,263 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 297 [2020-08-18 23:40:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:39,264 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2020-08-18 23:40:39,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-18 23:40:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2020-08-18 23:40:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-08-18 23:40:39,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:39,268 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:39,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-18 23:40:39,268 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:39,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:39,269 INFO L82 PathProgramCache]: Analyzing trace with hash 56135637, now seen corresponding path program 42 times [2020-08-18 23:40:39,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:39,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931338017] [2020-08-18 23:40:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 23:40:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 23:40:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 23:40:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 23:40:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6195 backedges. 84 proven. 2667 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2020-08-18 23:40:40,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931338017] [2020-08-18 23:40:40,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:40,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-18 23:40:40,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615608608] [2020-08-18 23:40:40,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-18 23:40:40,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:40,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-18 23:40:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2020-08-18 23:40:40,539 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 47 states. [2020-08-18 23:40:40,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:40,975 INFO L93 Difference]: Finished difference Result 317 states and 317 transitions. [2020-08-18 23:40:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-18 23:40:40,976 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 304 [2020-08-18 23:40:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:40,978 INFO L225 Difference]: With dead ends: 317 [2020-08-18 23:40:40,978 INFO L226 Difference]: Without dead ends: 315 [2020-08-18 23:40:40,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2020-08-18 23:40:40,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-08-18 23:40:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2020-08-18 23:40:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-08-18 23:40:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 314 transitions. [2020-08-18 23:40:40,988 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 314 transitions. Word has length 304 [2020-08-18 23:40:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:40,990 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 314 transitions. [2020-08-18 23:40:40,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-18 23:40:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 314 transitions. [2020-08-18 23:40:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-08-18 23:40:40,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:40,994 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:40,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-18 23:40:40,994 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:40,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:40,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1581966872, now seen corresponding path program 43 times [2020-08-18 23:40:40,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:40,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873267480] [2020-08-18 23:40:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 23:40:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 23:40:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 23:40:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 23:40:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 23:40:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 86 proven. 2795 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-08-18 23:40:42,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873267480] [2020-08-18 23:40:42,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:42,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-18 23:40:42,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089873687] [2020-08-18 23:40:42,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-18 23:40:42,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:42,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-18 23:40:42,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-08-18 23:40:42,294 INFO L87 Difference]: Start difference. First operand 314 states and 314 transitions. Second operand 48 states. [2020-08-18 23:40:42,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:42,798 INFO L93 Difference]: Finished difference Result 324 states and 324 transitions. [2020-08-18 23:40:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-18 23:40:42,798 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 311 [2020-08-18 23:40:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:42,801 INFO L225 Difference]: With dead ends: 324 [2020-08-18 23:40:42,801 INFO L226 Difference]: Without dead ends: 322 [2020-08-18 23:40:42,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2020-08-18 23:40:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-08-18 23:40:42,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 321. [2020-08-18 23:40:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-08-18 23:40:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 321 transitions. [2020-08-18 23:40:42,810 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 321 transitions. Word has length 311 [2020-08-18 23:40:42,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:42,811 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 321 transitions. [2020-08-18 23:40:42,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-18 23:40:42,811 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 321 transitions. [2020-08-18 23:40:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-18 23:40:42,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:42,813 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:42,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-18 23:40:42,813 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:42,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:42,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2076157045, now seen corresponding path program 44 times [2020-08-18 23:40:42,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:42,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848862775] [2020-08-18 23:40:42,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 23:40:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 23:40:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 23:40:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:43,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 23:40:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:44,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 23:40:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:44,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 23:40:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6798 backedges. 88 proven. 2926 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2020-08-18 23:40:44,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848862775] [2020-08-18 23:40:44,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:44,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-18 23:40:44,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345374023] [2020-08-18 23:40:44,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-18 23:40:44,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-18 23:40:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2020-08-18 23:40:44,062 INFO L87 Difference]: Start difference. First operand 321 states and 321 transitions. Second operand 49 states. [2020-08-18 23:40:44,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:44,566 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2020-08-18 23:40:44,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-18 23:40:44,567 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 318 [2020-08-18 23:40:44,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:44,569 INFO L225 Difference]: With dead ends: 331 [2020-08-18 23:40:44,569 INFO L226 Difference]: Without dead ends: 329 [2020-08-18 23:40:44,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1089, Invalid=1361, Unknown=0, NotChecked=0, Total=2450 [2020-08-18 23:40:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-08-18 23:40:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 328. [2020-08-18 23:40:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-18 23:40:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2020-08-18 23:40:44,579 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 318 [2020-08-18 23:40:44,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:44,579 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2020-08-18 23:40:44,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-18 23:40:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2020-08-18 23:40:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-08-18 23:40:44,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:44,582 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:44,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-18 23:40:44,582 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:44,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:44,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1146384056, now seen corresponding path program 45 times [2020-08-18 23:40:44,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:44,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512964858] [2020-08-18 23:40:44,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 23:40:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 23:40:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 23:40:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 23:40:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 23:40:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 23:40:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 23:40:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 90 proven. 3060 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2020-08-18 23:40:45,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512964858] [2020-08-18 23:40:45,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:45,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-18 23:40:45,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751820443] [2020-08-18 23:40:45,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-18 23:40:45,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:45,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-18 23:40:45,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-08-18 23:40:45,971 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 50 states. [2020-08-18 23:40:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:46,514 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2020-08-18 23:40:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-18 23:40:46,515 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 325 [2020-08-18 23:40:46,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:46,517 INFO L225 Difference]: With dead ends: 338 [2020-08-18 23:40:46,517 INFO L226 Difference]: Without dead ends: 336 [2020-08-18 23:40:46,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2020-08-18 23:40:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-08-18 23:40:46,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 335. [2020-08-18 23:40:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-08-18 23:40:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2020-08-18 23:40:46,526 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 325 [2020-08-18 23:40:46,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:46,526 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2020-08-18 23:40:46,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-18 23:40:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2020-08-18 23:40:46,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-18 23:40:46,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:46,529 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:46,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-18 23:40:46,529 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:46,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:46,530 INFO L82 PathProgramCache]: Analyzing trace with hash 22421781, now seen corresponding path program 46 times [2020-08-18 23:40:46,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:46,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95430247] [2020-08-18 23:40:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 23:40:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 23:40:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 23:40:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 23:40:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 23:40:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 23:40:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 23:40:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-08-18 23:40:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 92 proven. 3197 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-08-18 23:40:47,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95430247] [2020-08-18 23:40:47,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:47,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-18 23:40:47,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179934676] [2020-08-18 23:40:47,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-18 23:40:47,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:47,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-18 23:40:47,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2020-08-18 23:40:47,973 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 51 states. [2020-08-18 23:40:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:48,604 INFO L93 Difference]: Finished difference Result 345 states and 345 transitions. [2020-08-18 23:40:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-08-18 23:40:48,605 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 332 [2020-08-18 23:40:48,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:48,607 INFO L225 Difference]: With dead ends: 345 [2020-08-18 23:40:48,608 INFO L226 Difference]: Without dead ends: 343 [2020-08-18 23:40:48,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2020-08-18 23:40:48,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-08-18 23:40:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 342. [2020-08-18 23:40:48,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-08-18 23:40:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 342 transitions. [2020-08-18 23:40:48,618 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 342 transitions. Word has length 332 [2020-08-18 23:40:48,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:48,618 INFO L479 AbstractCegarLoop]: Abstraction has 342 states and 342 transitions. [2020-08-18 23:40:48,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-18 23:40:48,619 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 342 transitions. [2020-08-18 23:40:48,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-08-18 23:40:48,621 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:48,621 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:48,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-18 23:40:48,621 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:48,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:48,622 INFO L82 PathProgramCache]: Analyzing trace with hash -540172120, now seen corresponding path program 47 times [2020-08-18 23:40:48,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:48,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036361677] [2020-08-18 23:40:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 23:40:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 23:40:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 23:40:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 23:40:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 23:40:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 23:40:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 23:40:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-08-18 23:40:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-18 23:40:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7755 backedges. 94 proven. 3337 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2020-08-18 23:40:50,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036361677] [2020-08-18 23:40:50,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:50,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-18 23:40:50,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322953000] [2020-08-18 23:40:50,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-18 23:40:50,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:50,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-18 23:40:50,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2020-08-18 23:40:50,174 INFO L87 Difference]: Start difference. First operand 342 states and 342 transitions. Second operand 52 states. [2020-08-18 23:40:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:50,876 INFO L93 Difference]: Finished difference Result 352 states and 352 transitions. [2020-08-18 23:40:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-18 23:40:50,877 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 339 [2020-08-18 23:40:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:50,879 INFO L225 Difference]: With dead ends: 352 [2020-08-18 23:40:50,880 INFO L226 Difference]: Without dead ends: 350 [2020-08-18 23:40:50,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2020-08-18 23:40:50,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-08-18 23:40:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2020-08-18 23:40:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-08-18 23:40:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 349 transitions. [2020-08-18 23:40:50,892 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 349 transitions. Word has length 339 [2020-08-18 23:40:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:50,893 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 349 transitions. [2020-08-18 23:40:50,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-18 23:40:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 349 transitions. [2020-08-18 23:40:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-08-18 23:40:50,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:50,896 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:50,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-18 23:40:50,897 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:50,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2030437813, now seen corresponding path program 48 times [2020-08-18 23:40:50,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:50,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363283441] [2020-08-18 23:40:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 23:40:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 23:40:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 23:40:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 23:40:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 23:40:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 23:40:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 23:40:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-08-18 23:40:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-18 23:40:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2020-08-18 23:40:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8088 backedges. 96 proven. 3480 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2020-08-18 23:40:52,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363283441] [2020-08-18 23:40:52,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:52,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-18 23:40:52,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754107863] [2020-08-18 23:40:52,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-18 23:40:52,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:52,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-18 23:40:52,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2020-08-18 23:40:52,467 INFO L87 Difference]: Start difference. First operand 349 states and 349 transitions. Second operand 53 states. [2020-08-18 23:40:53,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:53,135 INFO L93 Difference]: Finished difference Result 359 states and 359 transitions. [2020-08-18 23:40:53,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-08-18 23:40:53,135 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 346 [2020-08-18 23:40:53,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:53,137 INFO L225 Difference]: With dead ends: 359 [2020-08-18 23:40:53,137 INFO L226 Difference]: Without dead ends: 357 [2020-08-18 23:40:53,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2020-08-18 23:40:53,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-18 23:40:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 356. [2020-08-18 23:40:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-08-18 23:40:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 356 transitions. [2020-08-18 23:40:53,147 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 356 transitions. Word has length 346 [2020-08-18 23:40:53,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:53,147 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 356 transitions. [2020-08-18 23:40:53,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-18 23:40:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 356 transitions. [2020-08-18 23:40:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-08-18 23:40:53,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:53,150 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:53,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-18 23:40:53,150 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:53,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:53,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1376696312, now seen corresponding path program 49 times [2020-08-18 23:40:53,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:53,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128287839] [2020-08-18 23:40:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 23:40:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 23:40:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 23:40:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 23:40:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 23:40:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 23:40:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 23:40:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-08-18 23:40:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-18 23:40:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2020-08-18 23:40:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-18 23:40:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8428 backedges. 98 proven. 3626 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-08-18 23:40:54,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128287839] [2020-08-18 23:40:54,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:54,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-08-18 23:40:54,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228435827] [2020-08-18 23:40:54,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-18 23:40:54,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:54,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-18 23:40:54,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2020-08-18 23:40:54,762 INFO L87 Difference]: Start difference. First operand 356 states and 356 transitions. Second operand 54 states. [2020-08-18 23:40:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:55,428 INFO L93 Difference]: Finished difference Result 366 states and 366 transitions. [2020-08-18 23:40:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-18 23:40:55,429 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 353 [2020-08-18 23:40:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:55,431 INFO L225 Difference]: With dead ends: 366 [2020-08-18 23:40:55,431 INFO L226 Difference]: Without dead ends: 364 [2020-08-18 23:40:55,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2020-08-18 23:40:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-08-18 23:40:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 363. [2020-08-18 23:40:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-08-18 23:40:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2020-08-18 23:40:55,440 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 353 [2020-08-18 23:40:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:55,441 INFO L479 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2020-08-18 23:40:55,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-18 23:40:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2020-08-18 23:40:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-08-18 23:40:55,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:55,444 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:55,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-18 23:40:55,444 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:55,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:55,444 INFO L82 PathProgramCache]: Analyzing trace with hash -432450987, now seen corresponding path program 50 times [2020-08-18 23:40:55,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:55,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962939930] [2020-08-18 23:40:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 23:40:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 23:40:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 23:40:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 23:40:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 23:40:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 23:40:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 23:40:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-08-18 23:40:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-18 23:40:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2020-08-18 23:40:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-18 23:40:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2020-08-18 23:40:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8775 backedges. 100 proven. 3775 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2020-08-18 23:40:57,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962939930] [2020-08-18 23:40:57,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:57,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-18 23:40:57,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089725301] [2020-08-18 23:40:57,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-18 23:40:57,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:57,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-18 23:40:57,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2020-08-18 23:40:57,100 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 55 states. [2020-08-18 23:40:57,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:40:57,797 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2020-08-18 23:40:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-08-18 23:40:57,797 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 360 [2020-08-18 23:40:57,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:40:57,800 INFO L225 Difference]: With dead ends: 373 [2020-08-18 23:40:57,800 INFO L226 Difference]: Without dead ends: 371 [2020-08-18 23:40:57,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1386, Invalid=1694, Unknown=0, NotChecked=0, Total=3080 [2020-08-18 23:40:57,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-08-18 23:40:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 370. [2020-08-18 23:40:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-08-18 23:40:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 370 transitions. [2020-08-18 23:40:57,809 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 370 transitions. Word has length 360 [2020-08-18 23:40:57,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:40:57,810 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 370 transitions. [2020-08-18 23:40:57,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-18 23:40:57,810 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 370 transitions. [2020-08-18 23:40:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-08-18 23:40:57,812 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:40:57,813 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:40:57,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-18 23:40:57,813 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:40:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:40:57,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1466730344, now seen corresponding path program 51 times [2020-08-18 23:40:57,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:40:57,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543477760] [2020-08-18 23:40:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:40:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:40:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:40:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:40:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 23:40:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:40:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:40:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:40:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:40:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:40:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:40:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:40:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:40:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:40:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:40:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:40:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:40:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 23:40:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:40:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:40:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 23:40:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 23:40:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 23:40:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 23:40:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 23:40:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 23:40:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 23:40:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 23:40:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 23:40:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 23:40:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 23:40:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 23:40:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 23:40:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 23:40:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 23:40:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 23:40:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 23:40:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 23:40:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 23:40:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 23:40:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 23:40:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 23:40:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 23:40:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 23:40:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 23:40:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 23:40:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 23:40:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-08-18 23:40:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-18 23:40:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2020-08-18 23:40:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-18 23:40:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2020-08-18 23:40:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-08-18 23:40:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:40:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9129 backedges. 102 proven. 3927 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2020-08-18 23:40:59,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543477760] [2020-08-18 23:40:59,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:40:59,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-08-18 23:40:59,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387930580] [2020-08-18 23:40:59,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-08-18 23:40:59,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:40:59,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-08-18 23:40:59,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2020-08-18 23:40:59,633 INFO L87 Difference]: Start difference. First operand 370 states and 370 transitions. Second operand 56 states.