/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:05:08,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:05:08,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:05:08,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:05:08,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:05:08,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:05:08,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:05:08,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:05:08,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:05:08,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:05:08,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:05:08,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:05:08,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:05:08,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:05:08,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:05:08,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:05:08,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:05:08,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:05:08,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:05:08,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:05:08,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:05:08,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:05:08,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:05:08,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:05:08,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 14:05:08,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:05:08,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:05:08,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:05:08,775 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 14:05:08,798 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:05:08,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:05:08,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:05:08,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:05:08,800 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:05:08,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:05:08,801 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:05:08,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:05:08,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:05:08,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:05:08,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:05:08,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:05:08,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:05:08,802 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:05:08,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:05:08,803 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:05:08,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:05:08,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:05:08,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:05:08,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:05:08,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:05:08,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:05:08,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:05:08,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:05:08,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:05:08,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:05:08,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:05:08,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:05:08,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:05:08,805 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 -> log-additional-information=true; [2020-08-21 14:05:09,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:05:09,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:05:09,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:05:09,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:05:09,123 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:05:09,124 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-08-21 14:05:09,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41eed9495/94b68740023f469ca051b36913b7d4f2/FLAGd49ab688f [2020-08-21 14:05:09,595 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:05:09,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-08-21 14:05:09,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41eed9495/94b68740023f469ca051b36913b7d4f2/FLAGd49ab688f [2020-08-21 14:05:09,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41eed9495/94b68740023f469ca051b36913b7d4f2 [2020-08-21 14:05:09,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:05:10,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:05:10,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:05:10,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:05:10,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:05:10,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:05:09" (1/1) ... [2020-08-21 14:05:10,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6dbbf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:05:10, skipping insertion in model container [2020-08-21 14:05:10,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:05:09" (1/1) ... [2020-08-21 14:05:10,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:05:10,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:05:10,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:05:10,289 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:05:10,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:05:10,315 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:05:10,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:05:10 WrapperNode [2020-08-21 14:05:10,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:05:10,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:05:10,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:05:10,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:05:10,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:05:10" (1/1) ... [2020-08-21 14:05:10,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:05:10" (1/1) ... [2020-08-21 14:05:10,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:05:10" (1/1) ... [2020-08-21 14:05:10,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:05:10" (1/1) ... [2020-08-21 14:05:10,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:05:10" (1/1) ... [2020-08-21 14:05:10,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:05:10" (1/1) ... [2020-08-21 14:05:10,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:05:10" (1/1) ... [2020-08-21 14:05:10,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:05:10,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:05:10,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:05:10,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:05:10,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:05:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:05:10,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:05:10,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:05:10,496 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-08-21 14:05:10,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:05:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:05:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:05:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-08-21 14:05:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:05:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:05:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:05:10,674 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:05:10,674 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 14:05:10,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:05:10 BoogieIcfgContainer [2020-08-21 14:05:10,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:05:10,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:05:10,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:05:10,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:05:10,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:05:09" (1/3) ... [2020-08-21 14:05:10,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baad3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:05:10, skipping insertion in model container [2020-08-21 14:05:10,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:05:10" (2/3) ... [2020-08-21 14:05:10,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baad3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:05:10, skipping insertion in model container [2020-08-21 14:05:10,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:05:10" (3/3) ... [2020-08-21 14:05:10,686 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-08-21 14:05:10,698 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:05:10,705 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:05:10,718 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:05:10,742 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:05:10,742 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:05:10,742 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:05:10,742 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:05:10,742 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:05:10,743 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:05:10,743 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:05:10,743 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:05:10,758 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-21 14:05:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 14:05:10,765 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:10,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:10,766 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:10,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-08-21 14:05:10,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:10,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301585065] [2020-08-21 14:05:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:10,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:10,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:05:11,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301585065] [2020-08-21 14:05:11,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:05:11,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:05:11,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933935220] [2020-08-21 14:05:11,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:05:11,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:11,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:05:11,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:05:11,065 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-08-21 14:05:11,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:11,194 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-21 14:05:11,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:05:11,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-21 14:05:11,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:11,206 INFO L225 Difference]: With dead ends: 33 [2020-08-21 14:05:11,207 INFO L226 Difference]: Without dead ends: 19 [2020-08-21 14:05:11,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:05:11,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-21 14:05:11,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-21 14:05:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 14:05:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-21 14:05:11,270 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-08-21 14:05:11,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:11,272 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-21 14:05:11,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:05:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-21 14:05:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:05:11,278 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:11,279 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:11,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:05:11,280 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:11,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:11,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2020-08-21 14:05:11,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:11,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814973196] [2020-08-21 14:05:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 14:05:11,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814973196] [2020-08-21 14:05:11,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:11,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 14:05:11,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679988429] [2020-08-21 14:05:11,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:05:11,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:11,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:05:11,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:05:11,605 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 8 states. [2020-08-21 14:05:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:11,727 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-08-21 14:05:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:05:11,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-21 14:05:11,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:11,729 INFO L225 Difference]: With dead ends: 26 [2020-08-21 14:05:11,729 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 14:05:11,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:05:11,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 14:05:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-21 14:05:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 14:05:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-08-21 14:05:11,738 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2020-08-21 14:05:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:11,738 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-08-21 14:05:11,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:05:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-08-21 14:05:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:05:11,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:11,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:11,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:05:11,741 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash 293522751, now seen corresponding path program 2 times [2020-08-21 14:05:11,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:11,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607039284] [2020-08-21 14:05:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 14:05:11,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607039284] [2020-08-21 14:05:11,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:11,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:05:11,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153650263] [2020-08-21 14:05:11,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:05:11,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:11,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:05:11,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:05:11,951 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-08-21 14:05:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:12,140 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-08-21 14:05:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:05:12,140 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-08-21 14:05:12,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:12,142 INFO L225 Difference]: With dead ends: 29 [2020-08-21 14:05:12,142 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 14:05:12,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:05:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 14:05:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-21 14:05:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 14:05:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-21 14:05:12,149 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 26 [2020-08-21 14:05:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:12,150 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-21 14:05:12,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:05:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-21 14:05:12,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 14:05:12,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:12,152 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:12,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:05:12,152 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:12,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:12,153 INFO L82 PathProgramCache]: Analyzing trace with hash -547108535, now seen corresponding path program 3 times [2020-08-21 14:05:12,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:12,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454076444] [2020-08-21 14:05:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 14:05:12,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454076444] [2020-08-21 14:05:12,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:12,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 14:05:12,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364600601] [2020-08-21 14:05:12,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:05:12,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:12,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:05:12,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:05:12,382 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 12 states. [2020-08-21 14:05:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:12,616 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-08-21 14:05:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:05:12,617 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-21 14:05:12,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:12,618 INFO L225 Difference]: With dead ends: 32 [2020-08-21 14:05:12,619 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 14:05:12,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:05:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 14:05:12,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-21 14:05:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 14:05:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-08-21 14:05:12,627 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 32 [2020-08-21 14:05:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:12,628 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-08-21 14:05:12,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:05:12,628 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-08-21 14:05:12,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 14:05:12,630 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:12,630 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:12,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:05:12,631 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:12,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1152432193, now seen corresponding path program 4 times [2020-08-21 14:05:12,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:12,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051456291] [2020-08-21 14:05:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 14:05:12,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051456291] [2020-08-21 14:05:12,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:12,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 14:05:12,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476296996] [2020-08-21 14:05:12,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:05:12,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:12,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:05:12,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:05:12,926 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-08-21 14:05:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:13,244 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-08-21 14:05:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:05:13,245 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-21 14:05:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:13,247 INFO L225 Difference]: With dead ends: 35 [2020-08-21 14:05:13,247 INFO L226 Difference]: Without dead ends: 31 [2020-08-21 14:05:13,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-08-21 14:05:13,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-21 14:05:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-21 14:05:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 14:05:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-21 14:05:13,267 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 38 [2020-08-21 14:05:13,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:13,269 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-21 14:05:13,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:05:13,269 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-21 14:05:13,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 14:05:13,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:13,273 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:13,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:05:13,274 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:13,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1461718089, now seen corresponding path program 5 times [2020-08-21 14:05:13,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:13,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801890321] [2020-08-21 14:05:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 14:05:13,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801890321] [2020-08-21 14:05:13,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:13,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 14:05:13,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132953182] [2020-08-21 14:05:13,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 14:05:13,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:13,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 14:05:13,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:05:13,664 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2020-08-21 14:05:14,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:14,039 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-08-21 14:05:14,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 14:05:14,040 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-08-21 14:05:14,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:14,041 INFO L225 Difference]: With dead ends: 38 [2020-08-21 14:05:14,041 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 14:05:14,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2020-08-21 14:05:14,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 14:05:14,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-08-21 14:05:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 14:05:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-08-21 14:05:14,053 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 44 [2020-08-21 14:05:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:14,053 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-08-21 14:05:14,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 14:05:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-08-21 14:05:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 14:05:14,055 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:14,056 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:14,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:05:14,056 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:14,057 INFO L82 PathProgramCache]: Analyzing trace with hash -269168065, now seen corresponding path program 6 times [2020-08-21 14:05:14,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:14,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553410519] [2020-08-21 14:05:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 14:05:14,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553410519] [2020-08-21 14:05:14,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:14,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 14:05:14,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598733835] [2020-08-21 14:05:14,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 14:05:14,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:14,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 14:05:14,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:05:14,392 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2020-08-21 14:05:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:14,956 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-08-21 14:05:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 14:05:14,957 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-21 14:05:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:14,959 INFO L225 Difference]: With dead ends: 41 [2020-08-21 14:05:14,959 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 14:05:14,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-08-21 14:05:14,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 14:05:14,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-21 14:05:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 14:05:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-21 14:05:14,968 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50 [2020-08-21 14:05:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:14,968 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-21 14:05:14,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 14:05:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-21 14:05:14,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 14:05:14,970 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:14,970 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:14,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:05:14,970 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:14,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:14,971 INFO L82 PathProgramCache]: Analyzing trace with hash 585432905, now seen corresponding path program 7 times [2020-08-21 14:05:14,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:14,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238795685] [2020-08-21 14:05:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 14:05:15,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238795685] [2020-08-21 14:05:15,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:15,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 14:05:15,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283666276] [2020-08-21 14:05:15,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 14:05:15,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:15,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 14:05:15,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-21 14:05:15,356 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 20 states. [2020-08-21 14:05:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:15,882 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-08-21 14:05:15,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 14:05:15,882 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-08-21 14:05:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:15,884 INFO L225 Difference]: With dead ends: 44 [2020-08-21 14:05:15,884 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 14:05:15,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 14:05:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 14:05:15,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-21 14:05:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 14:05:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-08-21 14:05:15,892 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 56 [2020-08-21 14:05:15,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:15,893 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-08-21 14:05:15,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 14:05:15,893 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-08-21 14:05:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 14:05:15,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:15,894 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:15,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:05:15,895 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:15,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:15,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1316711615, now seen corresponding path program 8 times [2020-08-21 14:05:15,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:15,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705291145] [2020-08-21 14:05:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:16,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:16,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:16,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:16,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:16,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:16,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:16,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 14:05:16,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705291145] [2020-08-21 14:05:16,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:16,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 14:05:16,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811514952] [2020-08-21 14:05:16,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 14:05:16,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:16,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 14:05:16,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:05:16,376 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 22 states. [2020-08-21 14:05:17,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:17,038 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-08-21 14:05:17,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 14:05:17,039 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2020-08-21 14:05:17,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:17,041 INFO L225 Difference]: With dead ends: 47 [2020-08-21 14:05:17,042 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 14:05:17,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2020-08-21 14:05:17,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 14:05:17,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-21 14:05:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 14:05:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-21 14:05:17,049 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 62 [2020-08-21 14:05:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:17,050 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-21 14:05:17,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 14:05:17,050 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-21 14:05:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-21 14:05:17,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:17,051 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:17,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:05:17,052 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:17,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:17,052 INFO L82 PathProgramCache]: Analyzing trace with hash 579248713, now seen corresponding path program 9 times [2020-08-21 14:05:17,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:17,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442519181] [2020-08-21 14:05:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 14:05:17,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442519181] [2020-08-21 14:05:17,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:17,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 14:05:17,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277295818] [2020-08-21 14:05:17,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 14:05:17,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:17,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 14:05:17,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-08-21 14:05:17,617 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 24 states. [2020-08-21 14:05:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:18,398 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-08-21 14:05:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 14:05:18,399 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2020-08-21 14:05:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:18,400 INFO L225 Difference]: With dead ends: 50 [2020-08-21 14:05:18,402 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 14:05:18,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 14:05:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 14:05:18,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-08-21 14:05:18,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 14:05:18,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-08-21 14:05:18,416 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 68 [2020-08-21 14:05:18,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:18,420 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-08-21 14:05:18,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 14:05:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-08-21 14:05:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-21 14:05:18,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:18,421 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:18,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:05:18,425 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:18,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:18,426 INFO L82 PathProgramCache]: Analyzing trace with hash 418322239, now seen corresponding path program 10 times [2020-08-21 14:05:18,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:18,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996930115] [2020-08-21 14:05:18,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:19,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:19,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-21 14:05:19,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996930115] [2020-08-21 14:05:19,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:19,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 14:05:19,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425732206] [2020-08-21 14:05:19,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 14:05:19,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:19,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 14:05:19,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-08-21 14:05:19,193 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 26 states. [2020-08-21 14:05:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:20,073 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-08-21 14:05:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 14:05:20,073 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2020-08-21 14:05:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:20,074 INFO L225 Difference]: With dead ends: 53 [2020-08-21 14:05:20,075 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 14:05:20,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=2029, Unknown=0, NotChecked=0, Total=2162 [2020-08-21 14:05:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 14:05:20,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-21 14:05:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-21 14:05:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-08-21 14:05:20,089 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 74 [2020-08-21 14:05:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:20,089 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-08-21 14:05:20,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 14:05:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-08-21 14:05:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-21 14:05:20,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:20,093 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:20,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:05:20,093 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:20,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:20,094 INFO L82 PathProgramCache]: Analyzing trace with hash 584643913, now seen corresponding path program 11 times [2020-08-21 14:05:20,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:20,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398838639] [2020-08-21 14:05:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-21 14:05:21,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398838639] [2020-08-21 14:05:21,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:21,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 14:05:21,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795806208] [2020-08-21 14:05:21,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 14:05:21,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:21,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 14:05:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-08-21 14:05:21,006 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 28 states. [2020-08-21 14:05:22,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:22,101 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-08-21 14:05:22,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 14:05:22,102 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2020-08-21 14:05:22,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:22,104 INFO L225 Difference]: With dead ends: 56 [2020-08-21 14:05:22,104 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 14:05:22,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=2405, Unknown=0, NotChecked=0, Total=2550 [2020-08-21 14:05:22,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 14:05:22,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-21 14:05:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 14:05:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-08-21 14:05:22,113 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 80 [2020-08-21 14:05:22,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:22,113 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-08-21 14:05:22,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 14:05:22,113 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-08-21 14:05:22,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 14:05:22,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:22,114 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:22,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:05:22,115 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:22,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:22,115 INFO L82 PathProgramCache]: Analyzing trace with hash -195309121, now seen corresponding path program 12 times [2020-08-21 14:05:22,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:22,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685167443] [2020-08-21 14:05:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-21 14:05:23,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685167443] [2020-08-21 14:05:23,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:23,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 14:05:23,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721842930] [2020-08-21 14:05:23,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 14:05:23,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:23,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 14:05:23,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-08-21 14:05:23,042 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 30 states. [2020-08-21 14:05:24,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:24,299 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-08-21 14:05:24,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-21 14:05:24,300 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-21 14:05:24,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:24,301 INFO L225 Difference]: With dead ends: 59 [2020-08-21 14:05:24,301 INFO L226 Difference]: Without dead ends: 55 [2020-08-21 14:05:24,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=157, Invalid=2813, Unknown=0, NotChecked=0, Total=2970 [2020-08-21 14:05:24,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-21 14:05:24,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-21 14:05:24,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-21 14:05:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-08-21 14:05:24,309 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 86 [2020-08-21 14:05:24,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:24,310 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-08-21 14:05:24,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 14:05:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-08-21 14:05:24,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 14:05:24,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:24,311 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:24,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:05:24,311 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:24,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:24,312 INFO L82 PathProgramCache]: Analyzing trace with hash 498071625, now seen corresponding path program 13 times [2020-08-21 14:05:24,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:24,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760403195] [2020-08-21 14:05:24,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:25,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:25,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:25,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:25,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-21 14:05:25,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760403195] [2020-08-21 14:05:25,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:25,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 14:05:25,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445745622] [2020-08-21 14:05:25,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 14:05:25,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:25,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 14:05:25,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-08-21 14:05:25,342 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 32 states. [2020-08-21 14:05:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:26,808 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-08-21 14:05:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 14:05:26,809 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2020-08-21 14:05:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:26,810 INFO L225 Difference]: With dead ends: 62 [2020-08-21 14:05:26,810 INFO L226 Difference]: Without dead ends: 58 [2020-08-21 14:05:26,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=169, Invalid=3253, Unknown=0, NotChecked=0, Total=3422 [2020-08-21 14:05:26,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-21 14:05:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-08-21 14:05:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 14:05:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-08-21 14:05:26,819 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 92 [2020-08-21 14:05:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:26,820 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-08-21 14:05:26,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 14:05:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-08-21 14:05:26,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 14:05:26,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:26,821 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:26,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:05:26,822 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:26,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:26,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1462920129, now seen corresponding path program 14 times [2020-08-21 14:05:26,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:26,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537948013] [2020-08-21 14:05:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:26,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:26,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:26,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:26,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-21 14:05:27,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537948013] [2020-08-21 14:05:27,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:27,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-21 14:05:27,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139474695] [2020-08-21 14:05:27,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-21 14:05:27,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:27,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-21 14:05:27,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 14:05:27,936 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 34 states. [2020-08-21 14:05:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:29,604 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-08-21 14:05:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-21 14:05:29,605 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2020-08-21 14:05:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:29,606 INFO L225 Difference]: With dead ends: 65 [2020-08-21 14:05:29,606 INFO L226 Difference]: Without dead ends: 61 [2020-08-21 14:05:29,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=181, Invalid=3725, Unknown=0, NotChecked=0, Total=3906 [2020-08-21 14:05:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-21 14:05:29,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-08-21 14:05:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 14:05:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-08-21 14:05:29,615 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 98 [2020-08-21 14:05:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:29,616 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-08-21 14:05:29,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-21 14:05:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-08-21 14:05:29,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-21 14:05:29,617 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:29,617 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:29,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:05:29,618 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2044701513, now seen corresponding path program 15 times [2020-08-21 14:05:29,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:29,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090420234] [2020-08-21 14:05:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-21 14:05:30,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090420234] [2020-08-21 14:05:30,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:30,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-21 14:05:30,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583480073] [2020-08-21 14:05:30,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-21 14:05:30,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:30,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-21 14:05:30,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 14:05:30,830 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 36 states. [2020-08-21 14:05:32,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:32,731 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-08-21 14:05:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-21 14:05:32,731 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 104 [2020-08-21 14:05:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:32,733 INFO L225 Difference]: With dead ends: 68 [2020-08-21 14:05:32,733 INFO L226 Difference]: Without dead ends: 64 [2020-08-21 14:05:32,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=193, Invalid=4229, Unknown=0, NotChecked=0, Total=4422 [2020-08-21 14:05:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-21 14:05:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-08-21 14:05:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 14:05:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-08-21 14:05:32,741 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 104 [2020-08-21 14:05:32,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:32,742 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-08-21 14:05:32,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-21 14:05:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-08-21 14:05:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 14:05:32,744 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:32,744 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:32,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:05:32,744 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:32,745 INFO L82 PathProgramCache]: Analyzing trace with hash -514820417, now seen corresponding path program 16 times [2020-08-21 14:05:32,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:32,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885536931] [2020-08-21 14:05:32,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-21 14:05:34,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885536931] [2020-08-21 14:05:34,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:34,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-21 14:05:34,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715184167] [2020-08-21 14:05:34,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-21 14:05:34,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:34,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-21 14:05:34,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 14:05:34,508 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 38 states. [2020-08-21 14:05:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:36,561 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-08-21 14:05:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-21 14:05:36,561 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2020-08-21 14:05:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:36,563 INFO L225 Difference]: With dead ends: 71 [2020-08-21 14:05:36,563 INFO L226 Difference]: Without dead ends: 67 [2020-08-21 14:05:36,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=205, Invalid=4765, Unknown=0, NotChecked=0, Total=4970 [2020-08-21 14:05:36,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-21 14:05:36,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-08-21 14:05:36,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 14:05:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-08-21 14:05:36,571 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 110 [2020-08-21 14:05:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:36,572 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-08-21 14:05:36,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-21 14:05:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-08-21 14:05:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-21 14:05:36,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:36,574 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:36,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:05:36,574 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:36,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:36,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1262227017, now seen corresponding path program 17 times [2020-08-21 14:05:36,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:36,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603743014] [2020-08-21 14:05:36,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:36,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:36,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:36,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:36,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:36,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:36,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:37,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:37,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:37,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:37,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:37,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:37,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:37,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:37,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:37,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:37,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:37,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:37,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:38,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-21 14:05:38,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603743014] [2020-08-21 14:05:38,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:38,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-21 14:05:38,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392747102] [2020-08-21 14:05:38,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-21 14:05:38,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:38,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-21 14:05:38,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 14:05:38,171 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 40 states. [2020-08-21 14:05:40,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:40,492 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-08-21 14:05:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-21 14:05:40,493 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2020-08-21 14:05:40,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:40,494 INFO L225 Difference]: With dead ends: 74 [2020-08-21 14:05:40,494 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 14:05:40,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=217, Invalid=5333, Unknown=0, NotChecked=0, Total=5550 [2020-08-21 14:05:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 14:05:40,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-21 14:05:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 14:05:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-08-21 14:05:40,502 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 116 [2020-08-21 14:05:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:40,502 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-08-21 14:05:40,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-21 14:05:40,503 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-08-21 14:05:40,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-21 14:05:40,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:40,504 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:40,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:05:40,505 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:40,505 INFO L82 PathProgramCache]: Analyzing trace with hash -336568001, now seen corresponding path program 18 times [2020-08-21 14:05:40,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:40,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833366789] [2020-08-21 14:05:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:40,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:40,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:40,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:40,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:40,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:40,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:40,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:40,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:41,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:41,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:41,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:41,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:41,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:41,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:41,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:41,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:41,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:41,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:41,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:41,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-21 14:05:42,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833366789] [2020-08-21 14:05:42,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:42,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-21 14:05:42,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028707426] [2020-08-21 14:05:42,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-21 14:05:42,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:42,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-21 14:05:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-08-21 14:05:42,168 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 42 states. [2020-08-21 14:05:44,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:44,750 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-08-21 14:05:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-21 14:05:44,751 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 122 [2020-08-21 14:05:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:44,752 INFO L225 Difference]: With dead ends: 77 [2020-08-21 14:05:44,753 INFO L226 Difference]: Without dead ends: 73 [2020-08-21 14:05:44,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=229, Invalid=5933, Unknown=0, NotChecked=0, Total=6162 [2020-08-21 14:05:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-21 14:05:44,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-08-21 14:05:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 14:05:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-08-21 14:05:44,761 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 122 [2020-08-21 14:05:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:44,761 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-08-21 14:05:44,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-21 14:05:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-08-21 14:05:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-21 14:05:44,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:44,763 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:44,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 14:05:44,763 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:44,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:44,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1835458231, now seen corresponding path program 19 times [2020-08-21 14:05:44,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:44,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872117749] [2020-08-21 14:05:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:44,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:44,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:44,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:44,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:45,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:45,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:45,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:45,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:45,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:45,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:45,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:45,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:45,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:45,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:45,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:45,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:45,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:46,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:46,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:46,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:46,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-21 14:05:46,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872117749] [2020-08-21 14:05:46,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:46,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-21 14:05:46,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993186637] [2020-08-21 14:05:46,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-21 14:05:46,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:46,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-21 14:05:46,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-08-21 14:05:46,616 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 44 states. [2020-08-21 14:05:49,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:49,494 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-08-21 14:05:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-21 14:05:49,497 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2020-08-21 14:05:49,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:49,498 INFO L225 Difference]: With dead ends: 80 [2020-08-21 14:05:49,498 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 14:05:49,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=241, Invalid=6565, Unknown=0, NotChecked=0, Total=6806 [2020-08-21 14:05:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 14:05:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-08-21 14:05:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 14:05:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-08-21 14:05:49,509 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 128 [2020-08-21 14:05:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:49,509 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-08-21 14:05:49,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-21 14:05:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-08-21 14:05:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-21 14:05:49,511 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:49,511 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:49,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 14:05:49,511 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:49,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:49,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2042190783, now seen corresponding path program 20 times [2020-08-21 14:05:49,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:49,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968567690] [2020-08-21 14:05:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:49,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:49,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:49,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:49,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:49,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:49,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:49,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:49,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:50,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:50,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:50,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:50,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:50,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:50,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:50,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:50,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:50,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:50,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:51,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:51,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:51,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:51,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-21 14:05:51,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968567690] [2020-08-21 14:05:51,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:51,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-21 14:05:51,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452243193] [2020-08-21 14:05:51,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-21 14:05:51,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:51,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-21 14:05:51,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-08-21 14:05:51,576 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 46 states. [2020-08-21 14:05:54,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:54,792 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-08-21 14:05:54,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-21 14:05:54,792 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2020-08-21 14:05:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:54,794 INFO L225 Difference]: With dead ends: 83 [2020-08-21 14:05:54,794 INFO L226 Difference]: Without dead ends: 79 [2020-08-21 14:05:54,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=253, Invalid=7229, Unknown=0, NotChecked=0, Total=7482 [2020-08-21 14:05:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-21 14:05:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-08-21 14:05:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 14:05:54,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-08-21 14:05:54,800 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 134 [2020-08-21 14:05:54,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:54,801 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-08-21 14:05:54,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-21 14:05:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-08-21 14:05:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-21 14:05:54,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:54,803 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:54,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 14:05:54,803 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:54,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:54,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2110448713, now seen corresponding path program 21 times [2020-08-21 14:05:54,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:54,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533224806] [2020-08-21 14:05:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:54,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:54,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:05:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:54,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:54,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:55,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:55,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:55,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:55,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:55,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:55,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:55,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:55,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:55,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:55,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:55,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:55,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:56,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:56,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:56,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:56,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:56,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:56,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:56,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:05:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-21 14:05:56,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533224806] [2020-08-21 14:05:56,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:56,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-21 14:05:56,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282779220] [2020-08-21 14:05:56,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-21 14:05:56,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:56,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-21 14:05:56,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-08-21 14:05:56,975 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 48 states. [2020-08-21 14:06:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:00,526 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2020-08-21 14:06:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-21 14:06:00,531 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2020-08-21 14:06:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:00,532 INFO L225 Difference]: With dead ends: 86 [2020-08-21 14:06:00,532 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 14:06:00,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=265, Invalid=7925, Unknown=0, NotChecked=0, Total=8190 [2020-08-21 14:06:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 14:06:00,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-21 14:06:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-21 14:06:00,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-08-21 14:06:00,539 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 140 [2020-08-21 14:06:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:00,539 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-08-21 14:06:00,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-21 14:06:00,539 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-08-21 14:06:00,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 14:06:00,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:00,541 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:00,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 14:06:00,541 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:00,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:00,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1589077567, now seen corresponding path program 22 times [2020-08-21 14:06:00,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:00,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375099357] [2020-08-21 14:06:00,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:00,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:00,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:06:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:00,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:00,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:00,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:00,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:00,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:01,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:01,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:01,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:01,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:01,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:01,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:01,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:01,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:01,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:01,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:01,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:02,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:02,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:02,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:02,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:02,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:02,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-21 14:06:02,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375099357] [2020-08-21 14:06:02,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:02,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-21 14:06:02,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182234505] [2020-08-21 14:06:02,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-21 14:06:02,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:02,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-21 14:06:02,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-08-21 14:06:02,996 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 50 states. [2020-08-21 14:06:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:06,881 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-08-21 14:06:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-21 14:06:06,882 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2020-08-21 14:06:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:06,884 INFO L225 Difference]: With dead ends: 89 [2020-08-21 14:06:06,885 INFO L226 Difference]: Without dead ends: 85 [2020-08-21 14:06:06,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=277, Invalid=8653, Unknown=0, NotChecked=0, Total=8930 [2020-08-21 14:06:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-21 14:06:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-08-21 14:06:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 14:06:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-08-21 14:06:06,890 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 146 [2020-08-21 14:06:06,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:06,890 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-08-21 14:06:06,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-21 14:06:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-08-21 14:06:06,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-21 14:06:06,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:06,892 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:06,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 14:06:06,892 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:06,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1482336439, now seen corresponding path program 23 times [2020-08-21 14:06:06,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:06,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758281498] [2020-08-21 14:06:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:06,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:06,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:06:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:07,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:07,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:07,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:07,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:07,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:07,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:07,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:07,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:07,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:07,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:07,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:08,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:08,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:08,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:08,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:08,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:08,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat