/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-eb0fd7c [2020-09-21 10:17:39,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:17:39,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:17:39,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:17:39,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:17:39,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:17:39,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:17:39,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:17:39,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:17:39,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:17:39,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:17:39,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:17:39,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:17:39,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:17:39,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:17:39,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:17:39,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:17:39,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:17:39,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:17:39,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:17:39,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:17:39,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:17:39,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:17:39,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:17:39,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:17:39,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:17:39,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:17:39,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:17:39,602 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 [2020-09-21 10:17:39,628 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:17:39,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:17:39,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:17:39,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:17:39,631 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:17:39,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:17:39,631 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:17:39,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:17:39,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:17:39,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:17:39,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:17:39,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:17:39,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:17:39,633 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:17:39,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:17:39,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:17:39,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:17:39,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:17:39,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:17:39,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:17:39,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:17:39,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:17:39,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:17:39,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:17:39,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:17:39,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:17:39,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:17:39,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:17:39,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:17:39,636 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 [2020-09-21 10:17:40,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:17:40,119 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:17:40,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:17:40,126 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:17:40,126 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:17:40,128 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-09-21 10:17:40,219 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97952b020/73fe752a41024234b78271936fac65e9/FLAG6f26e5161 [2020-09-21 10:17:40,839 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:17:40,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-09-21 10:17:40,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97952b020/73fe752a41024234b78271936fac65e9/FLAG6f26e5161 [2020-09-21 10:17:41,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97952b020/73fe752a41024234b78271936fac65e9 [2020-09-21 10:17:41,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:17:41,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:17:41,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:17:41,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:17:41,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:17:41,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:17:41" (1/1) ... [2020-09-21 10:17:41,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@446f26ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:41, skipping insertion in model container [2020-09-21 10:17:41,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:17:41" (1/1) ... [2020-09-21 10:17:41,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:17:41,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:17:41,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:17:41,524 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:17:41,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:17:41,556 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:17:41,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:41 WrapperNode [2020-09-21 10:17:41,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:17:41,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:17:41,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:17:41,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:17:41,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:41" (1/1) ... [2020-09-21 10:17:41,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:41" (1/1) ... [2020-09-21 10:17:41,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:41" (1/1) ... [2020-09-21 10:17:41,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:41" (1/1) ... [2020-09-21 10:17:41,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:41" (1/1) ... [2020-09-21 10:17:41,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:41" (1/1) ... [2020-09-21 10:17:41,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:41" (1/1) ... [2020-09-21 10:17:41,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:17:41,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:17:41,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:17:41,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:17:41,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:41" (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 [2020-09-21 10:17:41,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:17:41,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:17:41,743 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-09-21 10:17:41,744 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:17:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:17:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:17:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-09-21 10:17:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:17:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:17:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:17:41,958 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:17:41,959 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:17:41,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:17:41 BoogieIcfgContainer [2020-09-21 10:17:41,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:17:41,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:17:41,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:17:41,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:17:41,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:17:41" (1/3) ... [2020-09-21 10:17:41,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13657106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:17:41, skipping insertion in model container [2020-09-21 10:17:41,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:41" (2/3) ... [2020-09-21 10:17:41,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13657106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:17:41, skipping insertion in model container [2020-09-21 10:17:41,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:17:41" (3/3) ... [2020-09-21 10:17:41,974 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-09-21 10:17:41,986 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:17:41,997 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:17:42,020 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:17:42,049 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:17:42,049 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:17:42,049 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:17:42,049 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:17:42,050 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:17:42,050 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:17:42,050 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:17:42,050 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:17:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-09-21 10:17:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 10:17:42,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:42,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:42,078 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:42,085 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-09-21 10:17:42,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:42,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95629879] [2020-09-21 10:17:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:17:42,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95629879] [2020-09-21 10:17:42,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:17:42,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:17:42,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655170518] [2020-09-21 10:17:42,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:17:42,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:42,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:17:42,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:17:42,408 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-09-21 10:17:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:42,643 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-09-21 10:17:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:17:42,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-09-21 10:17:42,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:42,661 INFO L225 Difference]: With dead ends: 33 [2020-09-21 10:17:42,661 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 10:17:42,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:17:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 10:17:42,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-21 10:17:42,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-21 10:17:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-09-21 10:17:42,713 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-09-21 10:17:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:42,714 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-09-21 10:17:42,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:17:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-09-21 10:17:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:17:42,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:42,716 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:42,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:17:42,717 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:42,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2020-09-21 10:17:42,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:42,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778990542] [2020-09-21 10:17:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:17:42,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778990542] [2020-09-21 10:17:42,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:42,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:17:42,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769057960] [2020-09-21 10:17:42,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:17:42,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:42,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:17:42,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:17:42,902 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 8 states. [2020-09-21 10:17:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:43,028 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-09-21 10:17:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:17:43,029 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-09-21 10:17:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:43,030 INFO L225 Difference]: With dead ends: 26 [2020-09-21 10:17:43,030 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 10:17:43,032 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 [2020-09-21 10:17:43,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 10:17:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-21 10:17:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 10:17:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-21 10:17:43,039 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2020-09-21 10:17:43,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:43,040 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-21 10:17:43,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:17:43,040 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-21 10:17:43,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:17:43,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:43,041 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:43,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:17:43,042 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:43,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:43,043 INFO L82 PathProgramCache]: Analyzing trace with hash 293522751, now seen corresponding path program 2 times [2020-09-21 10:17:43,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:43,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769070320] [2020-09-21 10:17:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 10:17:43,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769070320] [2020-09-21 10:17:43,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:43,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:17:43,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343655616] [2020-09-21 10:17:43,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:17:43,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:43,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:17:43,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:17:43,279 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-09-21 10:17:43,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:43,468 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-09-21 10:17:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:17:43,468 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-09-21 10:17:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:43,470 INFO L225 Difference]: With dead ends: 29 [2020-09-21 10:17:43,470 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 10:17:43,471 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 [2020-09-21 10:17:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 10:17:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-21 10:17:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 10:17:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-21 10:17:43,478 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 26 [2020-09-21 10:17:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:43,478 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-21 10:17:43,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:17:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-21 10:17:43,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 10:17:43,480 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:43,480 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:43,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:17:43,481 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:43,481 INFO L82 PathProgramCache]: Analyzing trace with hash -547108535, now seen corresponding path program 3 times [2020-09-21 10:17:43,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:43,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526314626] [2020-09-21 10:17:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-21 10:17:43,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526314626] [2020-09-21 10:17:43,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:43,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 10:17:43,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082822765] [2020-09-21 10:17:43,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:17:43,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:43,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:17:43,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:17:43,730 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 12 states. [2020-09-21 10:17:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:43,939 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-09-21 10:17:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:17:43,939 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-09-21 10:17:43,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:43,941 INFO L225 Difference]: With dead ends: 32 [2020-09-21 10:17:43,941 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 10:17:43,942 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 [2020-09-21 10:17:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 10:17:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-21 10:17:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 10:17:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-21 10:17:43,948 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 32 [2020-09-21 10:17:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:43,949 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-21 10:17:43,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:17:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-21 10:17:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 10:17:43,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:43,951 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:43,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:17:43,951 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1152432193, now seen corresponding path program 4 times [2020-09-21 10:17:43,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:43,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628886745] [2020-09-21 10:17:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-21 10:17:44,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628886745] [2020-09-21 10:17:44,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:44,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:17:44,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290659088] [2020-09-21 10:17:44,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:17:44,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:44,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:17:44,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:17:44,316 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-21 10:17:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:44,625 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-09-21 10:17:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:17:44,626 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-09-21 10:17:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:44,628 INFO L225 Difference]: With dead ends: 35 [2020-09-21 10:17:44,628 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 10:17:44,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:17:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 10:17:44,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-21 10:17:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 10:17:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-09-21 10:17:44,636 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 38 [2020-09-21 10:17:44,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:44,636 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-09-21 10:17:44,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:17:44,637 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-09-21 10:17:44,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 10:17:44,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:44,638 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:44,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:17:44,639 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:44,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:44,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1461718089, now seen corresponding path program 5 times [2020-09-21 10:17:44,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:44,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250518623] [2020-09-21 10:17:44,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-21 10:17:44,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250518623] [2020-09-21 10:17:44,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:44,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 10:17:44,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789784583] [2020-09-21 10:17:44,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 10:17:44,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:44,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 10:17:44,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:17:44,936 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2020-09-21 10:17:45,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:45,278 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-09-21 10:17:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:17:45,279 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-09-21 10:17:45,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:45,281 INFO L225 Difference]: With dead ends: 38 [2020-09-21 10:17:45,281 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 10:17:45,283 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 [2020-09-21 10:17:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 10:17:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-09-21 10:17:45,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 10:17:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-21 10:17:45,289 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 44 [2020-09-21 10:17:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:45,290 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-21 10:17:45,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 10:17:45,290 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-21 10:17:45,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 10:17:45,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:45,292 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:45,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:17:45,293 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:45,293 INFO L82 PathProgramCache]: Analyzing trace with hash -269168065, now seen corresponding path program 6 times [2020-09-21 10:17:45,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:45,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163282691] [2020-09-21 10:17:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-21 10:17:45,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163282691] [2020-09-21 10:17:45,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:45,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 10:17:45,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243305197] [2020-09-21 10:17:45,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 10:17:45,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:45,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 10:17:45,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:17:45,692 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2020-09-21 10:17:46,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:46,188 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-09-21 10:17:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:17:46,189 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-09-21 10:17:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:46,190 INFO L225 Difference]: With dead ends: 41 [2020-09-21 10:17:46,190 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 10:17:46,192 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 [2020-09-21 10:17:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 10:17:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-21 10:17:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 10:17:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-09-21 10:17:46,204 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50 [2020-09-21 10:17:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:46,204 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-09-21 10:17:46,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 10:17:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-09-21 10:17:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 10:17:46,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:46,208 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:46,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:17:46,208 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:46,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash 585432905, now seen corresponding path program 7 times [2020-09-21 10:17:46,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:46,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241195817] [2020-09-21 10:17:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-21 10:17:46,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241195817] [2020-09-21 10:17:46,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:46,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 10:17:46,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618533298] [2020-09-21 10:17:46,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 10:17:46,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:46,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 10:17:46,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:17:46,672 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 20 states. [2020-09-21 10:17:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:47,257 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-09-21 10:17:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:17:47,258 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-09-21 10:17:47,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:47,259 INFO L225 Difference]: With dead ends: 44 [2020-09-21 10:17:47,259 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 10:17:47,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 10:17:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 10:17:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-21 10:17:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 10:17:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-09-21 10:17:47,268 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 56 [2020-09-21 10:17:47,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:47,268 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-09-21 10:17:47,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 10:17:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-09-21 10:17:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-21 10:17:47,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:47,270 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:47,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:17:47,271 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:47,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1316711615, now seen corresponding path program 8 times [2020-09-21 10:17:47,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:47,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874765347] [2020-09-21 10:17:47,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-09-21 10:17:47,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874765347] [2020-09-21 10:17:47,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:47,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 10:17:47,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458599190] [2020-09-21 10:17:47,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 10:17:47,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:47,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 10:17:47,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:17:47,799 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 22 states. [2020-09-21 10:17:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:48,583 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-09-21 10:17:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:17:48,584 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2020-09-21 10:17:48,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:48,585 INFO L225 Difference]: With dead ends: 47 [2020-09-21 10:17:48,585 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 10:17:48,586 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 [2020-09-21 10:17:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 10:17:48,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-21 10:17:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 10:17:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-09-21 10:17:48,593 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 62 [2020-09-21 10:17:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:48,593 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-09-21 10:17:48,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 10:17:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-09-21 10:17:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-21 10:17:48,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:48,595 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:48,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:17:48,596 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:48,596 INFO L82 PathProgramCache]: Analyzing trace with hash 579248713, now seen corresponding path program 9 times [2020-09-21 10:17:48,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:48,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029349733] [2020-09-21 10:17:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:49,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:49,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:49,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:49,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-09-21 10:17:49,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029349733] [2020-09-21 10:17:49,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:49,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 10:17:49,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586819581] [2020-09-21 10:17:49,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 10:17:49,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:49,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 10:17:49,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:17:49,275 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 24 states. [2020-09-21 10:17:50,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:50,175 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-09-21 10:17:50,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 10:17:50,176 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2020-09-21 10:17:50,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:50,178 INFO L225 Difference]: With dead ends: 50 [2020-09-21 10:17:50,178 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 10:17:50,180 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 [2020-09-21 10:17:50,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 10:17:50,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-09-21 10:17:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 10:17:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-09-21 10:17:50,188 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 68 [2020-09-21 10:17:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:50,189 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-09-21 10:17:50,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 10:17:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-09-21 10:17:50,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-21 10:17:50,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:50,191 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:50,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:17:50,191 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:50,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:50,191 INFO L82 PathProgramCache]: Analyzing trace with hash 418322239, now seen corresponding path program 10 times [2020-09-21 10:17:50,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:50,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503581603] [2020-09-21 10:17:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-09-21 10:17:51,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503581603] [2020-09-21 10:17:51,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:51,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 10:17:51,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575410469] [2020-09-21 10:17:51,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 10:17:51,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 10:17:51,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:17:51,022 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 26 states. [2020-09-21 10:17:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:51,994 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-09-21 10:17:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 10:17:51,995 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2020-09-21 10:17:51,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:51,996 INFO L225 Difference]: With dead ends: 53 [2020-09-21 10:17:51,996 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 10:17:51,998 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 [2020-09-21 10:17:51,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 10:17:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-09-21 10:17:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-21 10:17:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-09-21 10:17:52,011 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 74 [2020-09-21 10:17:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:52,011 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-09-21 10:17:52,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 10:17:52,012 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-09-21 10:17:52,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-21 10:17:52,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:52,022 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:52,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:17:52,022 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:52,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:52,025 INFO L82 PathProgramCache]: Analyzing trace with hash 584643913, now seen corresponding path program 11 times [2020-09-21 10:17:52,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:52,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612154430] [2020-09-21 10:17:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-09-21 10:17:52,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612154430] [2020-09-21 10:17:52,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:52,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-21 10:17:52,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050783823] [2020-09-21 10:17:52,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-21 10:17:52,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:52,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-21 10:17:52,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-09-21 10:17:52,942 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 28 states. [2020-09-21 10:17:54,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:54,206 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-09-21 10:17:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 10:17:54,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2020-09-21 10:17:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:54,207 INFO L225 Difference]: With dead ends: 56 [2020-09-21 10:17:54,208 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 10:17:54,209 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 [2020-09-21 10:17:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 10:17:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-09-21 10:17:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-21 10:17:54,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-09-21 10:17:54,216 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 80 [2020-09-21 10:17:54,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:54,216 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-09-21 10:17:54,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-21 10:17:54,216 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-09-21 10:17:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-21 10:17:54,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:54,218 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:54,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:17:54,218 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:54,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:54,218 INFO L82 PathProgramCache]: Analyzing trace with hash -195309121, now seen corresponding path program 12 times [2020-09-21 10:17:54,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:54,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443720331] [2020-09-21 10:17:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-09-21 10:17:55,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443720331] [2020-09-21 10:17:55,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:55,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-21 10:17:55,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32536687] [2020-09-21 10:17:55,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-21 10:17:55,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:55,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-21 10:17:55,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-09-21 10:17:55,236 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 30 states. [2020-09-21 10:17:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:56,581 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-09-21 10:17:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-21 10:17:56,582 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-09-21 10:17:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:56,584 INFO L225 Difference]: With dead ends: 59 [2020-09-21 10:17:56,584 INFO L226 Difference]: Without dead ends: 55 [2020-09-21 10:17:56,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=157, Invalid=2813, Unknown=0, NotChecked=0, Total=2970 [2020-09-21 10:17:56,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-21 10:17:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-21 10:17:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-21 10:17:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-09-21 10:17:56,595 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 86 [2020-09-21 10:17:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:56,596 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-09-21 10:17:56,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-21 10:17:56,596 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-09-21 10:17:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-21 10:17:56,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:56,597 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:56,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:17:56,599 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash 498071625, now seen corresponding path program 13 times [2020-09-21 10:17:56,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:56,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320952747] [2020-09-21 10:17:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-09-21 10:17:57,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320952747] [2020-09-21 10:17:57,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:57,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-21 10:17:57,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273857776] [2020-09-21 10:17:57,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-21 10:17:57,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:57,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-21 10:17:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-09-21 10:17:57,722 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 32 states. [2020-09-21 10:17:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:59,442 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-09-21 10:17:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 10:17:59,443 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2020-09-21 10:17:59,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:59,445 INFO L225 Difference]: With dead ends: 62 [2020-09-21 10:17:59,445 INFO L226 Difference]: Without dead ends: 58 [2020-09-21 10:17:59,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=3253, Unknown=0, NotChecked=0, Total=3422 [2020-09-21 10:17:59,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-21 10:17:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-09-21 10:17:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-21 10:17:59,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-09-21 10:17:59,452 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 92 [2020-09-21 10:17:59,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:59,453 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-09-21 10:17:59,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-21 10:17:59,453 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-09-21 10:17:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-21 10:17:59,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:59,454 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:59,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:17:59,455 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:59,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:59,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1462920129, now seen corresponding path program 14 times [2020-09-21 10:17:59,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:59,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613731357] [2020-09-21 10:17:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:17:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-09-21 10:18:00,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613731357] [2020-09-21 10:18:00,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:00,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-21 10:18:00,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974215430] [2020-09-21 10:18:00,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-21 10:18:00,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:00,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-21 10:18:00,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 10:18:00,671 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 34 states. [2020-09-21 10:18:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:02,578 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-09-21 10:18:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-21 10:18:02,579 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2020-09-21 10:18:02,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:02,580 INFO L225 Difference]: With dead ends: 65 [2020-09-21 10:18:02,581 INFO L226 Difference]: Without dead ends: 61 [2020-09-21 10:18:02,583 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 [2020-09-21 10:18:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-21 10:18:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-09-21 10:18:02,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-21 10:18:02,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-09-21 10:18:02,593 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 98 [2020-09-21 10:18:02,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:02,593 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-09-21 10:18:02,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-21 10:18:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-09-21 10:18:02,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-21 10:18:02,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:02,595 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:02,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:18:02,595 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:02,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:02,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2044701513, now seen corresponding path program 15 times [2020-09-21 10:18:02,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:02,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389075908] [2020-09-21 10:18:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:18:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-09-21 10:18:03,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389075908] [2020-09-21 10:18:03,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:03,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-21 10:18:03,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803302669] [2020-09-21 10:18:03,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-21 10:18:03,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:03,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-21 10:18:03,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 10:18:03,957 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 36 states. [2020-09-21 10:18:06,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:06,085 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-09-21 10:18:06,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-21 10:18:06,086 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 104 [2020-09-21 10:18:06,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:06,087 INFO L225 Difference]: With dead ends: 68 [2020-09-21 10:18:06,088 INFO L226 Difference]: Without dead ends: 64 [2020-09-21 10:18:06,090 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 [2020-09-21 10:18:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-21 10:18:06,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-09-21 10:18:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 10:18:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-09-21 10:18:06,095 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 104 [2020-09-21 10:18:06,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:06,096 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-09-21 10:18:06,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-21 10:18:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-09-21 10:18:06,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-21 10:18:06,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:06,098 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:06,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:18:06,098 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:06,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:06,098 INFO L82 PathProgramCache]: Analyzing trace with hash -514820417, now seen corresponding path program 16 times [2020-09-21 10:18:06,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:06,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644688746] [2020-09-21 10:18:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:18:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:07,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:07,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:07,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:07,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:07,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:07,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:07,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-09-21 10:18:07,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644688746] [2020-09-21 10:18:07,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:07,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-21 10:18:07,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295438227] [2020-09-21 10:18:07,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-21 10:18:07,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:07,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-21 10:18:07,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-09-21 10:18:07,889 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 38 states. [2020-09-21 10:18:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:10,225 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-09-21 10:18:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-21 10:18:10,226 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2020-09-21 10:18:10,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:10,227 INFO L225 Difference]: With dead ends: 71 [2020-09-21 10:18:10,227 INFO L226 Difference]: Without dead ends: 67 [2020-09-21 10:18:10,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=205, Invalid=4765, Unknown=0, NotChecked=0, Total=4970 [2020-09-21 10:18:10,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-21 10:18:10,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-09-21 10:18:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-21 10:18:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-09-21 10:18:10,234 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 110 [2020-09-21 10:18:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:10,234 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-09-21 10:18:10,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-21 10:18:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-09-21 10:18:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-21 10:18:10,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:10,236 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:10,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 10:18:10,237 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:10,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:10,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1262227017, now seen corresponding path program 17 times [2020-09-21 10:18:10,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:10,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151627394] [2020-09-21 10:18:10,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:18:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:12,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-09-21 10:18:12,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151627394] [2020-09-21 10:18:12,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:12,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-21 10:18:12,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041871823] [2020-09-21 10:18:12,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-21 10:18:12,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:12,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-21 10:18:12,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-09-21 10:18:12,291 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 40 states. [2020-09-21 10:18:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:14,893 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-09-21 10:18:14,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-21 10:18:14,894 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2020-09-21 10:18:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:14,895 INFO L225 Difference]: With dead ends: 74 [2020-09-21 10:18:14,895 INFO L226 Difference]: Without dead ends: 70 [2020-09-21 10:18:14,897 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 [2020-09-21 10:18:14,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-21 10:18:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-09-21 10:18:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-21 10:18:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-09-21 10:18:14,902 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 116 [2020-09-21 10:18:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:14,902 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-09-21 10:18:14,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-21 10:18:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-09-21 10:18:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-09-21 10:18:14,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:14,904 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:14,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 10:18:14,904 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:14,905 INFO L82 PathProgramCache]: Analyzing trace with hash -336568001, now seen corresponding path program 18 times [2020-09-21 10:18:14,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:14,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556818290] [2020-09-21 10:18:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:14,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:14,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:18:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:15,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:15,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:15,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:15,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:15,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:15,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:15,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:15,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:15,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:15,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:15,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-09-21 10:18:16,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556818290] [2020-09-21 10:18:16,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:16,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-21 10:18:16,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141413287] [2020-09-21 10:18:16,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-21 10:18:16,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:16,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-21 10:18:16,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-09-21 10:18:16,971 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 42 states. [2020-09-21 10:18:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:19,926 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-09-21 10:18:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-21 10:18:19,927 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 122 [2020-09-21 10:18:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:19,928 INFO L225 Difference]: With dead ends: 77 [2020-09-21 10:18:19,929 INFO L226 Difference]: Without dead ends: 73 [2020-09-21 10:18:19,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=229, Invalid=5933, Unknown=0, NotChecked=0, Total=6162 [2020-09-21 10:18:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-21 10:18:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-09-21 10:18:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-21 10:18:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-09-21 10:18:19,936 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 122 [2020-09-21 10:18:19,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:19,937 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-09-21 10:18:19,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-21 10:18:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-09-21 10:18:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-21 10:18:19,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:19,938 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:19,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 10:18:19,939 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:19,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1835458231, now seen corresponding path program 19 times [2020-09-21 10:18:19,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:19,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151934107] [2020-09-21 10:18:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:19,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:18:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:21,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:21,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:21,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:21,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:21,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:21,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:21,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:21,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-09-21 10:18:22,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151934107] [2020-09-21 10:18:22,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:22,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-21 10:18:22,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692808685] [2020-09-21 10:18:22,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-21 10:18:22,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:22,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-21 10:18:22,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-09-21 10:18:22,117 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 44 states. [2020-09-21 10:18:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:25,457 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-09-21 10:18:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-21 10:18:25,458 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2020-09-21 10:18:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:25,460 INFO L225 Difference]: With dead ends: 80 [2020-09-21 10:18:25,460 INFO L226 Difference]: Without dead ends: 76 [2020-09-21 10:18:25,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=241, Invalid=6565, Unknown=0, NotChecked=0, Total=6806 [2020-09-21 10:18:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-21 10:18:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-21 10:18:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-21 10:18:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-09-21 10:18:25,468 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 128 [2020-09-21 10:18:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:25,468 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-09-21 10:18:25,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-21 10:18:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-09-21 10:18:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-09-21 10:18:25,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:25,470 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:25,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 10:18:25,471 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:25,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:25,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2042190783, now seen corresponding path program 20 times [2020-09-21 10:18:25,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:25,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69732079] [2020-09-21 10:18:25,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:25,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:25,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:18:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:25,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:25,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:25,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:25,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:25,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:27,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:27,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:27,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:27,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:27,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:27,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-09-21 10:18:27,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69732079] [2020-09-21 10:18:27,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:27,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-21 10:18:27,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346975945] [2020-09-21 10:18:27,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-21 10:18:27,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:27,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-21 10:18:27,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-09-21 10:18:27,905 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 46 states. [2020-09-21 10:18:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:31,607 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-09-21 10:18:31,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-21 10:18:31,608 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2020-09-21 10:18:31,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:31,609 INFO L225 Difference]: With dead ends: 83 [2020-09-21 10:18:31,609 INFO L226 Difference]: Without dead ends: 79 [2020-09-21 10:18:31,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=253, Invalid=7229, Unknown=0, NotChecked=0, Total=7482 [2020-09-21 10:18:31,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-21 10:18:31,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-09-21 10:18:31,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 10:18:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-09-21 10:18:31,616 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 134 [2020-09-21 10:18:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:31,617 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-09-21 10:18:31,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-21 10:18:31,617 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-09-21 10:18:31,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-09-21 10:18:31,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:31,619 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:31,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 10:18:31,619 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:31,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2110448713, now seen corresponding path program 21 times [2020-09-21 10:18:31,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:31,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082474572] [2020-09-21 10:18:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:31,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:31,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:18:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:31,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:31,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:31,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:31,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:32,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:32,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:32,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:32,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:32,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:32,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:32,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:32,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:32,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:33,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:33,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:33,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:33,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:33,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:33,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:33,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:34,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:18:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-09-21 10:18:34,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082474572] [2020-09-21 10:18:34,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:34,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-09-21 10:18:34,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977016233] [2020-09-21 10:18:34,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-21 10:18:34,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:34,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-21 10:18:34,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-09-21 10:18:34,279 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 48 states.