/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:48:03,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:48:03,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:48:03,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:48:03,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:48:03,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:48:03,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:48:03,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:48:03,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:48:03,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:48:03,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:48:03,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:48:03,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:48:03,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:48:03,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:48:03,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:48:03,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:48:03,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:48:03,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:48:03,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:48:03,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:48:03,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:48:03,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:48:03,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:48:03,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:48:03,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:48:03,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:48:03,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:48:03,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:48:03,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:48:03,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:48:03,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:48:03,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:48:03,759 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:48:03,760 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:48:03,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:48:03,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:48:03,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:48:03,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:48:03,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:48:03,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:48:03,765 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 [2020-08-27 21:48:03,811 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:48:03,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:48:03,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:48:03,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:48:03,818 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:48:03,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:48:03,819 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:48:03,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:48:03,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:48:03,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:48:03,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:48:03,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:48:03,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:48:03,822 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:48:03,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:48:03,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:48:03,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:48:03,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:48:03,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:48:03,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:48:03,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:48:03,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:48:03,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:48:03,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:48:03,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:48:03,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:48:03,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:48:03,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:48:03,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:48:03,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-27 21:48:04,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:48:04,337 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:48:04,342 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:48:04,343 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:48:04,344 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:48:04,345 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-08-27 21:48:04,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1be14a54/97fcdac492894b93bd80871c024de3f1/FLAG06a990074 [2020-08-27 21:48:04,993 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:48:04,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-08-27 21:48:05,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1be14a54/97fcdac492894b93bd80871c024de3f1/FLAG06a990074 [2020-08-27 21:48:05,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1be14a54/97fcdac492894b93bd80871c024de3f1 [2020-08-27 21:48:05,344 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:48:05,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:48:05,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:48:05,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:48:05,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:48:05,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:48:05" (1/1) ... [2020-08-27 21:48:05,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5957f606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:48:05, skipping insertion in model container [2020-08-27 21:48:05,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:48:05" (1/1) ... [2020-08-27 21:48:05,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:48:05,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:48:05,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:48:05,602 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:48:05,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:48:05,639 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:48:05,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:48:05 WrapperNode [2020-08-27 21:48:05,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:48:05,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:48:05,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:48:05,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:48:05,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:48:05" (1/1) ... [2020-08-27 21:48:05,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:48:05" (1/1) ... [2020-08-27 21:48:05,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:48:05" (1/1) ... [2020-08-27 21:48:05,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:48:05" (1/1) ... [2020-08-27 21:48:05,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:48:05" (1/1) ... [2020-08-27 21:48:05,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:48:05" (1/1) ... [2020-08-27 21:48:05,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:48:05" (1/1) ... [2020-08-27 21:48:05,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:48:05,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:48:05,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:48:05,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:48:05,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:48:05" (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 [2020-08-27 21:48:05,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:48:05,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:48:05,829 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-08-27 21:48:05,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:48:05,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:48:05,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:48:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-08-27 21:48:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:48:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:48:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:48:06,038 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:48:06,038 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-27 21:48:06,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:48:06 BoogieIcfgContainer [2020-08-27 21:48:06,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:48:06,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:48:06,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:48:06,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:48:06,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:48:05" (1/3) ... [2020-08-27 21:48:06,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232729bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:48:06, skipping insertion in model container [2020-08-27 21:48:06,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:48:05" (2/3) ... [2020-08-27 21:48:06,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232729bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:48:06, skipping insertion in model container [2020-08-27 21:48:06,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:48:06" (3/3) ... [2020-08-27 21:48:06,054 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-08-27 21:48:06,066 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:48:06,077 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:48:06,100 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:48:06,128 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:48:06,128 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:48:06,128 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:48:06,129 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:48:06,129 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:48:06,129 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:48:06,129 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:48:06,129 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:48:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-27 21:48:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-27 21:48:06,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:06,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:06,157 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:06,164 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-08-27 21:48:06,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:06,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386330742] [2020-08-27 21:48:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:06,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:06,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:48:06,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386330742] [2020-08-27 21:48:06,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:48:06,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:48:06,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369139693] [2020-08-27 21:48:06,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:48:06,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:06,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:48:06,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:48:06,521 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-08-27 21:48:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:06,650 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-27 21:48:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:48:06,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-27 21:48:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:06,666 INFO L225 Difference]: With dead ends: 33 [2020-08-27 21:48:06,667 INFO L226 Difference]: Without dead ends: 19 [2020-08-27 21:48:06,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:48:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-27 21:48:06,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-27 21:48:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-27 21:48:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-27 21:48:06,733 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-08-27 21:48:06,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:06,733 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-27 21:48:06,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:48:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-27 21:48:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-27 21:48:06,736 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:06,736 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:06,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:48:06,737 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:06,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:06,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2020-08-27 21:48:06,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:06,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155827594] [2020-08-27 21:48:06,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:06,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:06,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:06,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-27 21:48:07,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155827594] [2020-08-27 21:48:07,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:07,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-27 21:48:07,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982046318] [2020-08-27 21:48:07,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:48:07,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:07,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:48:07,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:48:07,010 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 8 states. [2020-08-27 21:48:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:07,154 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-08-27 21:48:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-27 21:48:07,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-27 21:48:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:07,157 INFO L225 Difference]: With dead ends: 26 [2020-08-27 21:48:07,157 INFO L226 Difference]: Without dead ends: 22 [2020-08-27 21:48:07,158 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 [2020-08-27 21:48:07,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-27 21:48:07,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-27 21:48:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-27 21:48:07,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-08-27 21:48:07,166 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2020-08-27 21:48:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:07,167 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-08-27 21:48:07,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:48:07,167 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-08-27 21:48:07,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-27 21:48:07,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:07,169 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:07,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:48:07,169 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:07,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:07,170 INFO L82 PathProgramCache]: Analyzing trace with hash 293522751, now seen corresponding path program 2 times [2020-08-27 21:48:07,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:07,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182962752] [2020-08-27 21:48:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:07,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:07,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:07,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:07,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-27 21:48:07,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182962752] [2020-08-27 21:48:07,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:07,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-27 21:48:07,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177489611] [2020-08-27 21:48:07,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:48:07,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:07,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:48:07,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:48:07,460 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-08-27 21:48:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:07,641 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-08-27 21:48:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-27 21:48:07,642 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-08-27 21:48:07,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:07,643 INFO L225 Difference]: With dead ends: 29 [2020-08-27 21:48:07,643 INFO L226 Difference]: Without dead ends: 25 [2020-08-27 21:48:07,644 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 [2020-08-27 21:48:07,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-27 21:48:07,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-27 21:48:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-27 21:48:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-27 21:48:07,651 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 26 [2020-08-27 21:48:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:07,651 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-27 21:48:07,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:48:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-27 21:48:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-27 21:48:07,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:07,653 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:07,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:48:07,654 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:07,654 INFO L82 PathProgramCache]: Analyzing trace with hash -547108535, now seen corresponding path program 3 times [2020-08-27 21:48:07,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:07,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748277931] [2020-08-27 21:48:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:07,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:07,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:07,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:07,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:07,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-27 21:48:07,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748277931] [2020-08-27 21:48:07,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:07,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-27 21:48:07,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362025995] [2020-08-27 21:48:07,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-27 21:48:07,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:07,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-27 21:48:07,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:48:07,884 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 12 states. [2020-08-27 21:48:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:08,112 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-08-27 21:48:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-27 21:48:08,113 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-27 21:48:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:08,114 INFO L225 Difference]: With dead ends: 32 [2020-08-27 21:48:08,115 INFO L226 Difference]: Without dead ends: 28 [2020-08-27 21:48:08,115 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 [2020-08-27 21:48:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-27 21:48:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-27 21:48:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-27 21:48:08,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-08-27 21:48:08,122 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 32 [2020-08-27 21:48:08,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:08,123 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-08-27 21:48:08,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-27 21:48:08,123 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-08-27 21:48:08,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-27 21:48:08,125 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:08,125 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:08,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:48:08,126 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:08,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1152432193, now seen corresponding path program 4 times [2020-08-27 21:48:08,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:08,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700540610] [2020-08-27 21:48:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:08,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:08,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:08,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:08,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:08,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:08,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-27 21:48:08,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700540610] [2020-08-27 21:48:08,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:08,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-27 21:48:08,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472322488] [2020-08-27 21:48:08,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-27 21:48:08,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:08,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-27 21:48:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-27 21:48:08,431 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-08-27 21:48:08,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:08,741 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-08-27 21:48:08,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-27 21:48:08,741 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-27 21:48:08,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:08,743 INFO L225 Difference]: With dead ends: 35 [2020-08-27 21:48:08,743 INFO L226 Difference]: Without dead ends: 31 [2020-08-27 21:48:08,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-08-27 21:48:08,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-27 21:48:08,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-27 21:48:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-27 21:48:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-27 21:48:08,751 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 38 [2020-08-27 21:48:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:08,751 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-27 21:48:08,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-27 21:48:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-27 21:48:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-27 21:48:08,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:08,753 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:08,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:48:08,754 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:08,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:08,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1461718089, now seen corresponding path program 5 times [2020-08-27 21:48:08,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:08,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091698511] [2020-08-27 21:48:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:08,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:08,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:08,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:08,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:08,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:08,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:09,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-27 21:48:09,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091698511] [2020-08-27 21:48:09,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:09,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-27 21:48:09,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422490971] [2020-08-27 21:48:09,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-27 21:48:09,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:09,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-27 21:48:09,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-27 21:48:09,063 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2020-08-27 21:48:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:09,454 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-08-27 21:48:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-27 21:48:09,455 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-08-27 21:48:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:09,458 INFO L225 Difference]: With dead ends: 38 [2020-08-27 21:48:09,458 INFO L226 Difference]: Without dead ends: 34 [2020-08-27 21:48:09,460 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 [2020-08-27 21:48:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-27 21:48:09,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-08-27 21:48:09,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-27 21:48:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-08-27 21:48:09,468 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 44 [2020-08-27 21:48:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:09,470 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-08-27 21:48:09,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-27 21:48:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-08-27 21:48:09,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-27 21:48:09,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:09,475 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:09,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:48:09,476 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:09,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:09,480 INFO L82 PathProgramCache]: Analyzing trace with hash -269168065, now seen corresponding path program 6 times [2020-08-27 21:48:09,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:09,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213152130] [2020-08-27 21:48:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:09,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:09,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:09,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:09,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:09,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:09,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:09,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:09,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-27 21:48:09,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213152130] [2020-08-27 21:48:09,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:09,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-27 21:48:09,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522521913] [2020-08-27 21:48:09,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-27 21:48:09,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:09,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-27 21:48:09,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-08-27 21:48:09,866 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2020-08-27 21:48:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:10,371 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-08-27 21:48:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-27 21:48:10,372 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-27 21:48:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:10,373 INFO L225 Difference]: With dead ends: 41 [2020-08-27 21:48:10,373 INFO L226 Difference]: Without dead ends: 37 [2020-08-27 21:48:10,375 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 [2020-08-27 21:48:10,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-27 21:48:10,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-27 21:48:10,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-27 21:48:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-27 21:48:10,382 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50 [2020-08-27 21:48:10,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:10,382 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-27 21:48:10,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-27 21:48:10,382 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-27 21:48:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-27 21:48:10,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:10,384 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:10,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:48:10,384 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:10,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:10,384 INFO L82 PathProgramCache]: Analyzing trace with hash 585432905, now seen corresponding path program 7 times [2020-08-27 21:48:10,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:10,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672359782] [2020-08-27 21:48:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:10,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:10,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:10,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:10,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:10,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:10,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:10,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:10,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:10,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-27 21:48:10,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672359782] [2020-08-27 21:48:10,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:10,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-27 21:48:10,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073780621] [2020-08-27 21:48:10,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-27 21:48:10,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:10,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-27 21:48:10,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-27 21:48:10,937 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 20 states. [2020-08-27 21:48:11,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:11,628 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-08-27 21:48:11,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-27 21:48:11,628 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-08-27 21:48:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:11,630 INFO L225 Difference]: With dead ends: 44 [2020-08-27 21:48:11,630 INFO L226 Difference]: Without dead ends: 40 [2020-08-27 21:48:11,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2020-08-27 21:48:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-27 21:48:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-27 21:48:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-27 21:48:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-08-27 21:48:11,641 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 56 [2020-08-27 21:48:11,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:11,643 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-08-27 21:48:11,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-27 21:48:11,643 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-08-27 21:48:11,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-27 21:48:11,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:11,645 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:11,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:48:11,645 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:11,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1316711615, now seen corresponding path program 8 times [2020-08-27 21:48:11,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:11,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919724978] [2020-08-27 21:48:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:11,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:11,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:11,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:11,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:11,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:11,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:12,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:12,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:12,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:12,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-27 21:48:12,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919724978] [2020-08-27 21:48:12,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:12,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-27 21:48:12,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225765342] [2020-08-27 21:48:12,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-27 21:48:12,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:12,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-27 21:48:12,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-08-27 21:48:12,297 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 22 states. [2020-08-27 21:48:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:12,987 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-08-27 21:48:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-27 21:48:12,988 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2020-08-27 21:48:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:12,989 INFO L225 Difference]: With dead ends: 47 [2020-08-27 21:48:12,989 INFO L226 Difference]: Without dead ends: 43 [2020-08-27 21:48:12,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2020-08-27 21:48:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-27 21:48:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-27 21:48:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-27 21:48:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-27 21:48:12,997 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 62 [2020-08-27 21:48:12,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:12,997 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-27 21:48:12,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-27 21:48:12,998 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-27 21:48:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-27 21:48:12,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:12,999 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:12,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:48:12,999 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:13,000 INFO L82 PathProgramCache]: Analyzing trace with hash 579248713, now seen corresponding path program 9 times [2020-08-27 21:48:13,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:13,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503392273] [2020-08-27 21:48:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:13,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:13,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:13,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:13,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:13,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:13,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:13,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:13,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:13,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:13,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:13,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-27 21:48:13,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503392273] [2020-08-27 21:48:13,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:13,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-27 21:48:13,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122333638] [2020-08-27 21:48:13,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-27 21:48:13,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:13,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-27 21:48:13,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-08-27 21:48:13,607 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 24 states. [2020-08-27 21:48:14,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:14,568 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-08-27 21:48:14,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-27 21:48:14,568 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2020-08-27 21:48:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:14,570 INFO L225 Difference]: With dead ends: 50 [2020-08-27 21:48:14,570 INFO L226 Difference]: Without dead ends: 46 [2020-08-27 21:48:14,573 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 [2020-08-27 21:48:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-27 21:48:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-08-27 21:48:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-27 21:48:14,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-08-27 21:48:14,582 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 68 [2020-08-27 21:48:14,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:14,582 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-08-27 21:48:14,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-27 21:48:14,582 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-08-27 21:48:14,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-27 21:48:14,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:14,584 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:14,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:48:14,584 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:14,585 INFO L82 PathProgramCache]: Analyzing trace with hash 418322239, now seen corresponding path program 10 times [2020-08-27 21:48:14,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:14,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914220146] [2020-08-27 21:48:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:14,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:14,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:14,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:14,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:14,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:14,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:14,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:14,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:15,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:15,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:15,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:15,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-27 21:48:15,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914220146] [2020-08-27 21:48:15,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:15,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-27 21:48:15,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633317953] [2020-08-27 21:48:15,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-27 21:48:15,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:15,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-27 21:48:15,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-08-27 21:48:15,331 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 26 states. [2020-08-27 21:48:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:16,479 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-08-27 21:48:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-27 21:48:16,480 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2020-08-27 21:48:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:16,482 INFO L225 Difference]: With dead ends: 53 [2020-08-27 21:48:16,482 INFO L226 Difference]: Without dead ends: 49 [2020-08-27 21:48:16,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=2029, Unknown=0, NotChecked=0, Total=2162 [2020-08-27 21:48:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-27 21:48:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-27 21:48:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-27 21:48:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-08-27 21:48:16,490 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 74 [2020-08-27 21:48:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:16,491 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-08-27 21:48:16,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-27 21:48:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-08-27 21:48:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-27 21:48:16,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:16,493 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:16,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-27 21:48:16,493 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:16,494 INFO L82 PathProgramCache]: Analyzing trace with hash 584643913, now seen corresponding path program 11 times [2020-08-27 21:48:16,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:16,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704044647] [2020-08-27 21:48:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:16,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:16,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:16,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:16,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:16,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:16,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:16,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:16,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:17,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:17,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:17,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:17,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:17,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-27 21:48:17,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704044647] [2020-08-27 21:48:17,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:17,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-27 21:48:17,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443835063] [2020-08-27 21:48:17,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-27 21:48:17,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:17,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-27 21:48:17,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-08-27 21:48:17,436 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 28 states. [2020-08-27 21:48:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:18,742 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-08-27 21:48:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-27 21:48:18,744 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2020-08-27 21:48:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:18,749 INFO L225 Difference]: With dead ends: 56 [2020-08-27 21:48:18,749 INFO L226 Difference]: Without dead ends: 52 [2020-08-27 21:48:18,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=2405, Unknown=0, NotChecked=0, Total=2550 [2020-08-27 21:48:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-27 21:48:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-27 21:48:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-27 21:48:18,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-08-27 21:48:18,765 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 80 [2020-08-27 21:48:18,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:18,765 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-08-27 21:48:18,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-27 21:48:18,766 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-08-27 21:48:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-27 21:48:18,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:18,767 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:18,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-27 21:48:18,767 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:18,768 INFO L82 PathProgramCache]: Analyzing trace with hash -195309121, now seen corresponding path program 12 times [2020-08-27 21:48:18,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:18,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189019877] [2020-08-27 21:48:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:18,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:18,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:18,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:18,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:18,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:19,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:19,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:19,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:19,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:19,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:19,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:19,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:19,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:19,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-27 21:48:19,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189019877] [2020-08-27 21:48:19,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:19,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-27 21:48:19,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377078177] [2020-08-27 21:48:19,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-27 21:48:19,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:19,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-27 21:48:19,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-08-27 21:48:19,867 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 30 states. [2020-08-27 21:48:21,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:21,253 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-08-27 21:48:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-27 21:48:21,254 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-27 21:48:21,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:21,256 INFO L225 Difference]: With dead ends: 59 [2020-08-27 21:48:21,256 INFO L226 Difference]: Without dead ends: 55 [2020-08-27 21:48:21,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=2813, Unknown=0, NotChecked=0, Total=2970 [2020-08-27 21:48:21,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-27 21:48:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-27 21:48:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-27 21:48:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-08-27 21:48:21,264 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 86 [2020-08-27 21:48:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:21,265 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-08-27 21:48:21,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-27 21:48:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-08-27 21:48:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-27 21:48:21,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:21,266 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:21,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-27 21:48:21,267 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:21,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:21,267 INFO L82 PathProgramCache]: Analyzing trace with hash 498071625, now seen corresponding path program 13 times [2020-08-27 21:48:21,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:21,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971332461] [2020-08-27 21:48:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:21,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:21,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:21,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:21,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:21,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:21,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:21,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:21,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:21,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:21,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:22,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:22,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:22,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:22,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:22,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-27 21:48:22,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971332461] [2020-08-27 21:48:22,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:22,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-27 21:48:22,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561541825] [2020-08-27 21:48:22,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-27 21:48:22,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:22,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-27 21:48:22,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-08-27 21:48:22,574 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 32 states. [2020-08-27 21:48:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:24,164 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-08-27 21:48:24,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-27 21:48:24,166 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2020-08-27 21:48:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:24,167 INFO L225 Difference]: With dead ends: 62 [2020-08-27 21:48:24,167 INFO L226 Difference]: Without dead ends: 58 [2020-08-27 21:48:24,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=169, Invalid=3253, Unknown=0, NotChecked=0, Total=3422 [2020-08-27 21:48:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-27 21:48:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-08-27 21:48:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-27 21:48:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-08-27 21:48:24,186 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 92 [2020-08-27 21:48:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:24,186 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-08-27 21:48:24,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-27 21:48:24,187 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-08-27 21:48:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-27 21:48:24,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:24,188 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:24,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-27 21:48:24,188 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1462920129, now seen corresponding path program 14 times [2020-08-27 21:48:24,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:24,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374892039] [2020-08-27 21:48:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:24,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:24,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:24,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:24,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:24,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:24,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:24,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:24,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:24,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:24,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:24,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:24,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:25,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:25,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:25,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:25,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-27 21:48:25,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374892039] [2020-08-27 21:48:25,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:25,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-27 21:48:25,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173118439] [2020-08-27 21:48:25,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-27 21:48:25,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:25,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-27 21:48:25,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-08-27 21:48:25,430 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 34 states. [2020-08-27 21:48:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:27,339 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-08-27 21:48:27,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-27 21:48:27,339 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2020-08-27 21:48:27,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:27,341 INFO L225 Difference]: With dead ends: 65 [2020-08-27 21:48:27,341 INFO L226 Difference]: Without dead ends: 61 [2020-08-27 21:48:27,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=181, Invalid=3725, Unknown=0, NotChecked=0, Total=3906 [2020-08-27 21:48:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-27 21:48:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-08-27 21:48:27,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-27 21:48:27,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-08-27 21:48:27,352 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 98 [2020-08-27 21:48:27,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:27,352 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-08-27 21:48:27,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-27 21:48:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-08-27 21:48:27,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-27 21:48:27,354 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:27,354 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:27,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-27 21:48:27,354 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:27,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2044701513, now seen corresponding path program 15 times [2020-08-27 21:48:27,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:27,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475497012] [2020-08-27 21:48:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:27,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:27,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:27,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:27,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:27,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:27,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:27,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:27,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:27,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:27,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:28,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:28,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:28,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:28,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:28,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:28,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:28,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-27 21:48:28,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475497012] [2020-08-27 21:48:28,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:28,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-27 21:48:28,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295882632] [2020-08-27 21:48:28,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-27 21:48:28,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:28,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-27 21:48:28,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-08-27 21:48:28,845 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 36 states. [2020-08-27 21:48:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:30,910 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-08-27 21:48:30,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-27 21:48:30,910 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 104 [2020-08-27 21:48:30,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:30,912 INFO L225 Difference]: With dead ends: 68 [2020-08-27 21:48:30,912 INFO L226 Difference]: Without dead ends: 64 [2020-08-27 21:48:30,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=193, Invalid=4229, Unknown=0, NotChecked=0, Total=4422 [2020-08-27 21:48:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-27 21:48:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-08-27 21:48:30,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-27 21:48:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-08-27 21:48:30,920 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 104 [2020-08-27 21:48:30,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:30,921 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-08-27 21:48:30,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-27 21:48:30,921 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-08-27 21:48:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-27 21:48:30,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:30,923 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:30,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-27 21:48:30,923 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:30,923 INFO L82 PathProgramCache]: Analyzing trace with hash -514820417, now seen corresponding path program 16 times [2020-08-27 21:48:30,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:30,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978637685] [2020-08-27 21:48:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:30,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:30,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:31,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:31,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:31,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:31,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:31,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:31,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:31,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:31,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:31,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:31,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:31,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:32,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:32,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:32,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:32,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:32,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-27 21:48:32,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978637685] [2020-08-27 21:48:32,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:32,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-27 21:48:32,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257899217] [2020-08-27 21:48:32,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-27 21:48:32,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:32,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-27 21:48:32,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-08-27 21:48:32,948 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 38 states. [2020-08-27 21:48:35,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:35,383 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-08-27 21:48:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-27 21:48:35,383 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2020-08-27 21:48:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:35,385 INFO L225 Difference]: With dead ends: 71 [2020-08-27 21:48:35,385 INFO L226 Difference]: Without dead ends: 67 [2020-08-27 21:48:35,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=205, Invalid=4765, Unknown=0, NotChecked=0, Total=4970 [2020-08-27 21:48:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-27 21:48:35,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-08-27 21:48:35,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-27 21:48:35,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-08-27 21:48:35,393 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 110 [2020-08-27 21:48:35,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:35,394 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-08-27 21:48:35,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-27 21:48:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-08-27 21:48:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-27 21:48:35,395 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:35,395 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:35,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-27 21:48:35,396 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:35,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:35,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1262227017, now seen corresponding path program 17 times [2020-08-27 21:48:35,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:35,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045879688] [2020-08-27 21:48:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:35,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:35,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:35,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:35,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:35,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:35,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:35,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:36,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:36,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:36,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:36,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:36,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:36,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:36,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:36,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:36,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:37,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:37,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:37,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-27 21:48:37,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045879688] [2020-08-27 21:48:37,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:37,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-27 21:48:37,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297820064] [2020-08-27 21:48:37,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-27 21:48:37,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:37,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-27 21:48:37,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-08-27 21:48:37,449 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 40 states. [2020-08-27 21:48:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:40,245 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-08-27 21:48:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-27 21:48:40,246 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2020-08-27 21:48:40,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:40,247 INFO L225 Difference]: With dead ends: 74 [2020-08-27 21:48:40,248 INFO L226 Difference]: Without dead ends: 70 [2020-08-27 21:48:40,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=217, Invalid=5333, Unknown=0, NotChecked=0, Total=5550 [2020-08-27 21:48:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-27 21:48:40,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-27 21:48:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-27 21:48:40,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-08-27 21:48:40,256 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 116 [2020-08-27 21:48:40,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:40,257 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-08-27 21:48:40,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-27 21:48:40,257 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-08-27 21:48:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-27 21:48:40,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:40,259 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:40,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-27 21:48:40,259 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:40,259 INFO L82 PathProgramCache]: Analyzing trace with hash -336568001, now seen corresponding path program 18 times [2020-08-27 21:48:40,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:40,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174704395] [2020-08-27 21:48:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:40,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:40,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:40,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:40,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:40,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:40,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:40,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:40,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:40,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:41,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:41,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:41,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:41,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:41,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:41,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:41,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:41,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:41,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:42,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:42,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-27 21:48:42,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174704395] [2020-08-27 21:48:42,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:42,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-27 21:48:42,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561583939] [2020-08-27 21:48:42,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-27 21:48:42,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:42,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-27 21:48:42,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-08-27 21:48:42,358 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 42 states. [2020-08-27 21:48:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:45,374 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-08-27 21:48:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-27 21:48:45,375 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 122 [2020-08-27 21:48:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:45,376 INFO L225 Difference]: With dead ends: 77 [2020-08-27 21:48:45,376 INFO L226 Difference]: Without dead ends: 73 [2020-08-27 21:48:45,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=229, Invalid=5933, Unknown=0, NotChecked=0, Total=6162 [2020-08-27 21:48:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-27 21:48:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-08-27 21:48:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-27 21:48:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-08-27 21:48:45,384 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 122 [2020-08-27 21:48:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:45,385 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-08-27 21:48:45,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-27 21:48:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-08-27 21:48:45,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-27 21:48:45,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:45,386 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:45,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-27 21:48:45,387 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:45,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:45,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1835458231, now seen corresponding path program 19 times [2020-08-27 21:48:45,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:45,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763032470] [2020-08-27 21:48:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:45,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:45,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:45,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:45,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:45,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:45,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:45,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:46,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:46,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:46,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:46,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:46,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:46,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:46,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:46,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:46,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:46,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:47,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:47,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:47,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:47,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-27 21:48:47,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763032470] [2020-08-27 21:48:47,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:47,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-27 21:48:47,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831924304] [2020-08-27 21:48:47,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-27 21:48:47,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:47,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-27 21:48:47,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-08-27 21:48:47,632 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 44 states. [2020-08-27 21:48:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:51,106 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-08-27 21:48:51,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-27 21:48:51,107 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2020-08-27 21:48:51,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:51,109 INFO L225 Difference]: With dead ends: 80 [2020-08-27 21:48:51,109 INFO L226 Difference]: Without dead ends: 76 [2020-08-27 21:48:51,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=241, Invalid=6565, Unknown=0, NotChecked=0, Total=6806 [2020-08-27 21:48:51,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-27 21:48:51,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-08-27 21:48:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-27 21:48:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-08-27 21:48:51,118 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 128 [2020-08-27 21:48:51,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:51,119 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-08-27 21:48:51,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-27 21:48:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-08-27 21:48:51,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-27 21:48:51,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:51,120 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:51,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-27 21:48:51,121 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:51,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2042190783, now seen corresponding path program 20 times [2020-08-27 21:48:51,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:51,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660665824] [2020-08-27 21:48:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:51,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:51,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:51,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:51,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:51,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:51,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:51,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:51,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:51,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:52,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:52,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:52,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:52,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:52,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:52,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:52,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:52,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:52,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:53,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:53,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:53,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:53,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-27 21:48:53,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660665824] [2020-08-27 21:48:53,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:48:53,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-27 21:48:53,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765500456] [2020-08-27 21:48:53,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-27 21:48:53,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:48:53,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-27 21:48:53,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-08-27 21:48:53,731 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 46 states. [2020-08-27 21:48:57,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:48:57,607 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-08-27 21:48:57,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-27 21:48:57,608 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2020-08-27 21:48:57,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:48:57,610 INFO L225 Difference]: With dead ends: 83 [2020-08-27 21:48:57,610 INFO L226 Difference]: Without dead ends: 79 [2020-08-27 21:48:57,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=253, Invalid=7229, Unknown=0, NotChecked=0, Total=7482 [2020-08-27 21:48:57,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-27 21:48:57,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-08-27 21:48:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-27 21:48:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-08-27 21:48:57,619 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 134 [2020-08-27 21:48:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:48:57,619 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-08-27 21:48:57,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-27 21:48:57,620 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-08-27 21:48:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-27 21:48:57,621 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:48:57,621 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:48:57,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-27 21:48:57,621 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:48:57,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:48:57,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2110448713, now seen corresponding path program 21 times [2020-08-27 21:48:57,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:48:57,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573942509] [2020-08-27 21:48:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:48:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:57,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:48:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:57,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:48:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:57,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:57,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:58,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:58,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:58,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:58,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:58,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:58,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:48:58,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:48:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat