/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:04:28,806 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-24 15:04:28,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:04:28,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:04:28,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:04:28,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:04:28,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:04:28,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:04:28,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:04:28,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:04:28,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:04:28,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:04:28,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:04:28,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:04:28,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:04:28,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:04:28,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:04:28,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:04:28,882 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 [2020-09-24 15:04:28,909 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:04:28,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:04:28,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:04:28,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:04:28,911 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:04:28,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:04:28,912 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:04:28,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:04:28,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:04:28,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:04:28,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:04:28,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:04:28,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:04:28,913 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:04:28,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:04:28,913 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:04:28,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:04:28,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:04:28,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:04:28,914 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:04:28,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:04:28,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:04:28,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:04:28,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:04:28,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:04:28,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:04:28,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:04:28,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:04:28,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:04:28,916 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:04:29,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:04:29,432 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:04:29,437 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:04:29,439 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:04:29,439 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:04:29,442 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label36.c [2020-09-24 15:04:29,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c25f00eb/e43d8aa4dc8f4cd0b08e0423a3077f2f/FLAG633131b9f [2020-09-24 15:04:30,175 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:04:30,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label36.c [2020-09-24 15:04:30,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c25f00eb/e43d8aa4dc8f4cd0b08e0423a3077f2f/FLAG633131b9f [2020-09-24 15:04:30,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c25f00eb/e43d8aa4dc8f4cd0b08e0423a3077f2f [2020-09-24 15:04:30,405 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:04:30,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:04:30,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:04:30,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:04:30,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:04:30,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:04:30" (1/1) ... [2020-09-24 15:04:30,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb7919e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:30, skipping insertion in model container [2020-09-24 15:04:30,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:04:30" (1/1) ... [2020-09-24 15:04:30,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:04:30,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:04:31,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:04:31,230 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:04:31,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:04:31,577 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:04:31,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:31 WrapperNode [2020-09-24 15:04:31,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:04:31,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:04:31,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:04:31,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:04:31,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:31" (1/1) ... [2020-09-24 15:04:31,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:31" (1/1) ... [2020-09-24 15:04:31,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:31" (1/1) ... [2020-09-24 15:04:31,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:31" (1/1) ... [2020-09-24 15:04:31,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:31" (1/1) ... [2020-09-24 15:04:31,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:31" (1/1) ... [2020-09-24 15:04:31,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:31" (1/1) ... [2020-09-24 15:04:31,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:04:31,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:04:31,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:04:31,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:04:31,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:31" (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 [2020-09-24 15:04:31,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:04:31,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:04:31,827 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 15:04:31,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:04:31,828 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 15:04:31,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:04:31,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:04:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 15:04:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:04:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:04:31,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:04:33,566 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:04:33,567 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:04:33,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:04:33 BoogieIcfgContainer [2020-09-24 15:04:33,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:04:33,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:04:33,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:04:33,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:04:33,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:04:30" (1/3) ... [2020-09-24 15:04:33,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6fd930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:04:33, skipping insertion in model container [2020-09-24 15:04:33,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:31" (2/3) ... [2020-09-24 15:04:33,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6fd930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:04:33, skipping insertion in model container [2020-09-24 15:04:33,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:04:33" (3/3) ... [2020-09-24 15:04:33,588 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label36.c [2020-09-24 15:04:33,600 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:04:33,611 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:04:33,635 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:04:33,674 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:04:33,676 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:04:33,676 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:04:33,677 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:04:33,677 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:04:33,677 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:04:33,677 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:04:33,677 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:04:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states. [2020-09-24 15:04:33,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 15:04:33,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:33,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:33,738 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:33,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:33,745 INFO L82 PathProgramCache]: Analyzing trace with hash -4985686, now seen corresponding path program 1 times [2020-09-24 15:04:33,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:33,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615463834] [2020-09-24 15:04:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:34,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:04:34,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615463834] [2020-09-24 15:04:34,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:04:34,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:04:34,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059275431] [2020-09-24 15:04:34,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:04:34,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:04:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:04:34,169 INFO L87 Difference]: Start difference. First operand 678 states. Second operand 5 states. [2020-09-24 15:04:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:38,092 INFO L93 Difference]: Finished difference Result 1969 states and 2695 transitions. [2020-09-24 15:04:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:04:38,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-09-24 15:04:38,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:38,124 INFO L225 Difference]: With dead ends: 1969 [2020-09-24 15:04:38,124 INFO L226 Difference]: Without dead ends: 1228 [2020-09-24 15:04:38,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:04:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2020-09-24 15:04:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 997. [2020-09-24 15:04:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-09-24 15:04:38,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1298 transitions. [2020-09-24 15:04:38,270 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1298 transitions. Word has length 67 [2020-09-24 15:04:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:38,272 INFO L479 AbstractCegarLoop]: Abstraction has 997 states and 1298 transitions. [2020-09-24 15:04:38,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:04:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1298 transitions. [2020-09-24 15:04:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-09-24 15:04:38,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:38,292 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:38,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:04:38,293 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:38,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1110606662, now seen corresponding path program 1 times [2020-09-24 15:04:38,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:38,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957648118] [2020-09-24 15:04:38,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:38,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:38,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:04:38,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957648118] [2020-09-24 15:04:38,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:04:38,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:04:38,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104142228] [2020-09-24 15:04:38,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:04:38,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:38,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:04:38,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:04:38,739 INFO L87 Difference]: Start difference. First operand 997 states and 1298 transitions. Second operand 8 states. [2020-09-24 15:04:41,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:41,554 INFO L93 Difference]: Finished difference Result 2640 states and 3636 transitions. [2020-09-24 15:04:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:04:41,555 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 170 [2020-09-24 15:04:41,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:41,572 INFO L225 Difference]: With dead ends: 2640 [2020-09-24 15:04:41,573 INFO L226 Difference]: Without dead ends: 1658 [2020-09-24 15:04:41,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:04:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2020-09-24 15:04:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1584. [2020-09-24 15:04:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1584 states. [2020-09-24 15:04:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2092 transitions. [2020-09-24 15:04:41,686 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2092 transitions. Word has length 170 [2020-09-24 15:04:41,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:41,690 INFO L479 AbstractCegarLoop]: Abstraction has 1584 states and 2092 transitions. [2020-09-24 15:04:41,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:04:41,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2092 transitions. [2020-09-24 15:04:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-09-24 15:04:41,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:41,711 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:41,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:04:41,712 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:41,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1244659725, now seen corresponding path program 1 times [2020-09-24 15:04:41,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:41,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188699959] [2020-09-24 15:04:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:41,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:42,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:42,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:04:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 102 proven. 71 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 15:04:42,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188699959] [2020-09-24 15:04:42,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:42,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:04:42,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257977366] [2020-09-24 15:04:42,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:04:42,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:42,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:04:42,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:04:42,275 INFO L87 Difference]: Start difference. First operand 1584 states and 2092 transitions. Second operand 9 states. [2020-09-24 15:04:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:46,587 INFO L93 Difference]: Finished difference Result 4160 states and 5530 transitions. [2020-09-24 15:04:46,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:04:46,590 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 246 [2020-09-24 15:04:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:46,617 INFO L225 Difference]: With dead ends: 4160 [2020-09-24 15:04:46,618 INFO L226 Difference]: Without dead ends: 2591 [2020-09-24 15:04:46,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:04:46,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2020-09-24 15:04:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1978. [2020-09-24 15:04:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1978 states. [2020-09-24 15:04:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2539 transitions. [2020-09-24 15:04:46,704 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2539 transitions. Word has length 246 [2020-09-24 15:04:46,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:46,706 INFO L479 AbstractCegarLoop]: Abstraction has 1978 states and 2539 transitions. [2020-09-24 15:04:46,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:04:46,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2539 transitions. [2020-09-24 15:04:46,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-09-24 15:04:46,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:46,719 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:46,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:04:46,720 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:46,720 INFO L82 PathProgramCache]: Analyzing trace with hash -534522417, now seen corresponding path program 1 times [2020-09-24 15:04:46,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:46,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412251418] [2020-09-24 15:04:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:46,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:46,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:47,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 15:04:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:47,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-24 15:04:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-09-24 15:04:47,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412251418] [2020-09-24 15:04:47,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:47,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:04:47,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377558708] [2020-09-24 15:04:47,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:04:47,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:04:47,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:04:47,423 INFO L87 Difference]: Start difference. First operand 1978 states and 2539 transitions. Second operand 9 states. [2020-09-24 15:04:51,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:51,739 INFO L93 Difference]: Finished difference Result 4028 states and 5281 transitions. [2020-09-24 15:04:51,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:04:51,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 376 [2020-09-24 15:04:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:51,752 INFO L225 Difference]: With dead ends: 4028 [2020-09-24 15:04:51,753 INFO L226 Difference]: Without dead ends: 2447 [2020-09-24 15:04:51,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:04:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2020-09-24 15:04:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2410. [2020-09-24 15:04:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2410 states. [2020-09-24 15:04:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 3018 transitions. [2020-09-24 15:04:51,837 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 3018 transitions. Word has length 376 [2020-09-24 15:04:51,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:51,837 INFO L479 AbstractCegarLoop]: Abstraction has 2410 states and 3018 transitions. [2020-09-24 15:04:51,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:04:51,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 3018 transitions. [2020-09-24 15:04:51,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-09-24 15:04:51,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:51,850 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:51,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:04:51,852 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash -265000666, now seen corresponding path program 1 times [2020-09-24 15:04:51,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:51,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523445712] [2020-09-24 15:04:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:52,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:52,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:52,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-24 15:04:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:52,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-09-24 15:04:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 199 proven. 221 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-24 15:04:52,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523445712] [2020-09-24 15:04:52,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:52,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:04:52,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333060752] [2020-09-24 15:04:52,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:04:52,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:52,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:04:52,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:04:52,945 INFO L87 Difference]: Start difference. First operand 2410 states and 3018 transitions. Second operand 11 states. [2020-09-24 15:04:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:58,197 INFO L93 Difference]: Finished difference Result 5421 states and 6855 transitions. [2020-09-24 15:04:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 15:04:58,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 386 [2020-09-24 15:04:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:58,214 INFO L225 Difference]: With dead ends: 5421 [2020-09-24 15:04:58,214 INFO L226 Difference]: Without dead ends: 3260 [2020-09-24 15:04:58,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2020-09-24 15:04:58,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2020-09-24 15:04:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 3204. [2020-09-24 15:04:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3204 states. [2020-09-24 15:04:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 3876 transitions. [2020-09-24 15:04:58,298 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 3876 transitions. Word has length 386 [2020-09-24 15:04:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:58,299 INFO L479 AbstractCegarLoop]: Abstraction has 3204 states and 3876 transitions. [2020-09-24 15:04:58,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:04:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 3876 transitions. [2020-09-24 15:04:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2020-09-24 15:04:58,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:58,316 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:58,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:04:58,317 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:58,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:58,317 INFO L82 PathProgramCache]: Analyzing trace with hash 218853277, now seen corresponding path program 1 times [2020-09-24 15:04:58,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:58,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827200134] [2020-09-24 15:04:58,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:58,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:58,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:58,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:04:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:58,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 15:04:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:58,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-09-24 15:04:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 509 proven. 2 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2020-09-24 15:04:59,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827200134] [2020-09-24 15:04:59,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:59,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:04:59,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727274499] [2020-09-24 15:04:59,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:04:59,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:59,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:04:59,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:04:59,105 INFO L87 Difference]: Start difference. First operand 3204 states and 3876 transitions. Second operand 7 states. [2020-09-24 15:05:02,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:05:02,804 INFO L93 Difference]: Finished difference Result 7056 states and 8950 transitions. [2020-09-24 15:05:02,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:05:02,805 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 529 [2020-09-24 15:05:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:05:02,824 INFO L225 Difference]: With dead ends: 7056 [2020-09-24 15:05:02,824 INFO L226 Difference]: Without dead ends: 4249 [2020-09-24 15:05:02,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:05:02,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2020-09-24 15:05:02,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 4010. [2020-09-24 15:05:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4010 states. [2020-09-24 15:05:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4010 states to 4010 states and 4864 transitions. [2020-09-24 15:05:02,926 INFO L78 Accepts]: Start accepts. Automaton has 4010 states and 4864 transitions. Word has length 529 [2020-09-24 15:05:02,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:05:02,927 INFO L479 AbstractCegarLoop]: Abstraction has 4010 states and 4864 transitions. [2020-09-24 15:05:02,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:05:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 4010 states and 4864 transitions. [2020-09-24 15:05:02,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2020-09-24 15:05:02,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:05:02,944 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:05:02,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:05:02,945 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:05:02,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:05:02,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1803488621, now seen corresponding path program 1 times [2020-09-24 15:05:02,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:05:02,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996898018] [2020-09-24 15:05:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:05:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:03,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:05:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:03,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:05:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:03,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:05:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:03,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 15:05:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:03,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-09-24 15:05:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 547 proven. 222 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-09-24 15:05:03,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996898018] [2020-09-24 15:05:03,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:05:03,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 15:05:03,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501789053] [2020-09-24 15:05:03,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 15:05:03,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:05:03,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 15:05:03,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:05:03,812 INFO L87 Difference]: Start difference. First operand 4010 states and 4864 transitions. Second operand 12 states. [2020-09-24 15:05:13,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:05:13,944 INFO L93 Difference]: Finished difference Result 9423 states and 11610 transitions. [2020-09-24 15:05:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-24 15:05:13,945 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 541 [2020-09-24 15:05:13,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:05:13,978 INFO L225 Difference]: With dead ends: 9423 [2020-09-24 15:05:13,979 INFO L226 Difference]: Without dead ends: 5810 [2020-09-24 15:05:13,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=422, Invalid=1834, Unknown=0, NotChecked=0, Total=2256 [2020-09-24 15:05:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5810 states. [2020-09-24 15:05:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5810 to 3809. [2020-09-24 15:05:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3809 states. [2020-09-24 15:05:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3809 states to 3809 states and 4607 transitions. [2020-09-24 15:05:14,102 INFO L78 Accepts]: Start accepts. Automaton has 3809 states and 4607 transitions. Word has length 541 [2020-09-24 15:05:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:05:14,103 INFO L479 AbstractCegarLoop]: Abstraction has 3809 states and 4607 transitions. [2020-09-24 15:05:14,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 15:05:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3809 states and 4607 transitions. [2020-09-24 15:05:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2020-09-24 15:05:14,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:05:14,114 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:05:14,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:05:14,114 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:05:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:05:14,115 INFO L82 PathProgramCache]: Analyzing trace with hash 802919336, now seen corresponding path program 1 times [2020-09-24 15:05:14,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:05:14,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969656221] [2020-09-24 15:05:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:05:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:14,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:05:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:14,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:05:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:14,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:05:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:14,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 15:05:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:14,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 339 [2020-09-24 15:05:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:14,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-09-24 15:05:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 452 proven. 140 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2020-09-24 15:05:14,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969656221] [2020-09-24 15:05:14,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:05:14,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:05:14,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703066253] [2020-09-24 15:05:14,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:05:14,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:05:14,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:05:14,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:05:14,973 INFO L87 Difference]: Start difference. First operand 3809 states and 4607 transitions. Second operand 7 states. [2020-09-24 15:05:18,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:05:18,734 INFO L93 Difference]: Finished difference Result 8345 states and 10502 transitions. [2020-09-24 15:05:18,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:05:18,735 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 623 [2020-09-24 15:05:18,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:05:18,760 INFO L225 Difference]: With dead ends: 8345 [2020-09-24 15:05:18,764 INFO L226 Difference]: Without dead ends: 4933 [2020-09-24 15:05:18,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:05:18,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2020-09-24 15:05:18,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4902. [2020-09-24 15:05:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4902 states. [2020-09-24 15:05:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4902 states to 4902 states and 6054 transitions. [2020-09-24 15:05:18,887 INFO L78 Accepts]: Start accepts. Automaton has 4902 states and 6054 transitions. Word has length 623 [2020-09-24 15:05:18,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:05:18,888 INFO L479 AbstractCegarLoop]: Abstraction has 4902 states and 6054 transitions. [2020-09-24 15:05:18,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:05:18,889 INFO L276 IsEmpty]: Start isEmpty. Operand 4902 states and 6054 transitions. [2020-09-24 15:05:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2020-09-24 15:05:18,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:05:18,908 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:05:18,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:05:18,909 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:05:18,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:05:18,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2077567481, now seen corresponding path program 1 times [2020-09-24 15:05:18,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:05:18,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699715085] [2020-09-24 15:05:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:05:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:19,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:05:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:19,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:05:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:19,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:05:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:19,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 15:05:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:19,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-09-24 15:05:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:19,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 463 [2020-09-24 15:05:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 712 proven. 220 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2020-09-24 15:05:20,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699715085] [2020-09-24 15:05:20,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:05:20,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 15:05:20,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571128740] [2020-09-24 15:05:20,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 15:05:20,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:05:20,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 15:05:20,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:05:20,163 INFO L87 Difference]: Start difference. First operand 4902 states and 6054 transitions. Second operand 13 states. [2020-09-24 15:05:27,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:05:27,161 INFO L93 Difference]: Finished difference Result 10545 states and 13016 transitions. [2020-09-24 15:05:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 15:05:27,162 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 624 [2020-09-24 15:05:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:05:27,184 INFO L225 Difference]: With dead ends: 10545 [2020-09-24 15:05:27,184 INFO L226 Difference]: Without dead ends: 5913 [2020-09-24 15:05:27,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2020-09-24 15:05:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5913 states. [2020-09-24 15:05:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5913 to 5460. [2020-09-24 15:05:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5460 states. [2020-09-24 15:05:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 6579 transitions. [2020-09-24 15:05:27,305 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 6579 transitions. Word has length 624 [2020-09-24 15:05:27,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:05:27,306 INFO L479 AbstractCegarLoop]: Abstraction has 5460 states and 6579 transitions. [2020-09-24 15:05:27,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 15:05:27,306 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 6579 transitions. [2020-09-24 15:05:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2020-09-24 15:05:27,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:05:27,321 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:05:27,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:05:27,322 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:05:27,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:05:27,323 INFO L82 PathProgramCache]: Analyzing trace with hash 374331114, now seen corresponding path program 1 times [2020-09-24 15:05:27,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:05:27,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89920843] [2020-09-24 15:05:27,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:05:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:27,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:05:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:27,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:05:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:27,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:05:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:27,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 15:05:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:27,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-09-24 15:05:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:28,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 527 [2020-09-24 15:05:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 775 proven. 301 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2020-09-24 15:05:28,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89920843] [2020-09-24 15:05:28,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:05:28,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 15:05:28,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368627432] [2020-09-24 15:05:28,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 15:05:28,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:05:28,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 15:05:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:05:28,912 INFO L87 Difference]: Start difference. First operand 5460 states and 6579 transitions. Second operand 13 states.