/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_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:04:11,622 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-24 15:04:11,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:04:11,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:04:11,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:04:11,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:04:11,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:04:11,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:04:11,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:04:11,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:04:11,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:04:11,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:04:11,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:04:11,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:04:11,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:04:11,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:04:11,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:04:11,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:04:11,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:04:11,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:04:11,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:04:11,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:04:11,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:04:11,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:04:11,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:04:11,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:04:11,696 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 15:04:11,745 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:04:11,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:04:11,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:04:11,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:04:11,749 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:04:11,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:04:11,749 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:04:11,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:04:11,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:04:11,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:04:11,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:04:11,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:04:11,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:04:11,752 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:04:11,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:04:11,753 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:04:11,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:04:11,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:04:11,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:04:11,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:04:11,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:04:11,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:04:11,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:04:11,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:04:11,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:04:11,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:04:11,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:04:11,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:04:11,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:04:11,757 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 15:04:12,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:04:12,254 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:04:12,258 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:04:12,260 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:04:12,261 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:04:12,262 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-09-24 15:04:12,343 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ade1953d8/9a7f2300bfa440e588acb08b5a5473ec/FLAG478e0fc93 [2020-09-24 15:04:12,970 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:04:12,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-09-24 15:04:12,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ade1953d8/9a7f2300bfa440e588acb08b5a5473ec/FLAG478e0fc93 [2020-09-24 15:04:13,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ade1953d8/9a7f2300bfa440e588acb08b5a5473ec [2020-09-24 15:04:13,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:04:13,240 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:04:13,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:04:13,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:04:13,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:04:13,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:04:13" (1/1) ... [2020-09-24 15:04:13,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4de5375c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:13, skipping insertion in model container [2020-09-24 15:04:13,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:04:13" (1/1) ... [2020-09-24 15:04:13,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:04:13,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:04:14,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:04:14,015 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:04:14,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:04:14,187 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:04:14,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:14 WrapperNode [2020-09-24 15:04:14,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:04:14,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:04:14,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:04:14,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:04:14,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:14" (1/1) ... [2020-09-24 15:04:14,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:14" (1/1) ... [2020-09-24 15:04:14,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:14" (1/1) ... [2020-09-24 15:04:14,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:14" (1/1) ... [2020-09-24 15:04:14,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:14" (1/1) ... [2020-09-24 15:04:14,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:14" (1/1) ... [2020-09-24 15:04:14,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:14" (1/1) ... [2020-09-24 15:04:14,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:04:14,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:04:14,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:04:14,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:04:14,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:14" (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 15:04:14,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:04:14,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:04:14,448 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 15:04:14,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:04:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 15:04:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:04:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:04:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 15:04:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:04:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:04:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:04:16,150 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:04:16,151 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:04:16,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:04:16 BoogieIcfgContainer [2020-09-24 15:04:16,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:04:16,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:04:16,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:04:16,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:04:16,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:04:13" (1/3) ... [2020-09-24 15:04:16,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b534f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:04:16, skipping insertion in model container [2020-09-24 15:04:16,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:14" (2/3) ... [2020-09-24 15:04:16,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b534f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:04:16, skipping insertion in model container [2020-09-24 15:04:16,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:04:16" (3/3) ... [2020-09-24 15:04:16,171 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label01.c [2020-09-24 15:04:16,183 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:04:16,194 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:04:16,217 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:04:16,259 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:04:16,259 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:04:16,259 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:04:16,259 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:04:16,260 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:04:16,260 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:04:16,260 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:04:16,260 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:04:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states. [2020-09-24 15:04:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 15:04:16,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:16,315 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, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:16,316 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:16,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:16,322 INFO L82 PathProgramCache]: Analyzing trace with hash -899775614, now seen corresponding path program 1 times [2020-09-24 15:04:16,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:16,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72136444] [2020-09-24 15:04:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:16,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:16,877 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 15:04:16,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72136444] [2020-09-24 15:04:16,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:04:16,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:04:16,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957994596] [2020-09-24 15:04:16,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:04:16,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:16,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:04:16,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:04:16,922 INFO L87 Difference]: Start difference. First operand 678 states. Second operand 5 states. [2020-09-24 15:04:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:21,084 INFO L93 Difference]: Finished difference Result 1969 states and 2695 transitions. [2020-09-24 15:04:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:04:21,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-09-24 15:04:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:21,117 INFO L225 Difference]: With dead ends: 1969 [2020-09-24 15:04:21,118 INFO L226 Difference]: Without dead ends: 1228 [2020-09-24 15:04:21,130 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 15:04:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2020-09-24 15:04:21,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 997. [2020-09-24 15:04:21,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-09-24 15:04:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1298 transitions. [2020-09-24 15:04:21,266 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1298 transitions. Word has length 73 [2020-09-24 15:04:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:21,268 INFO L479 AbstractCegarLoop]: Abstraction has 997 states and 1298 transitions. [2020-09-24 15:04:21,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:04:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1298 transitions. [2020-09-24 15:04:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-24 15:04:21,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:21,293 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, 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] [2020-09-24 15:04:21,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:04:21,293 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:21,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1043809266, now seen corresponding path program 1 times [2020-09-24 15:04:21,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:21,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765022772] [2020-09-24 15:04:21,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:21,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:21,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:04:21,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765022772] [2020-09-24 15:04:21,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:04:21,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:04:21,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75285983] [2020-09-24 15:04:21,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:04:21,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:21,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:04:21,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:04:21,718 INFO L87 Difference]: Start difference. First operand 997 states and 1298 transitions. Second operand 8 states. [2020-09-24 15:04:24,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:24,578 INFO L93 Difference]: Finished difference Result 2640 states and 3636 transitions. [2020-09-24 15:04:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:04:24,579 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 176 [2020-09-24 15:04:24,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:24,596 INFO L225 Difference]: With dead ends: 2640 [2020-09-24 15:04:24,596 INFO L226 Difference]: Without dead ends: 1658 [2020-09-24 15:04:24,603 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 15:04:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2020-09-24 15:04:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1584. [2020-09-24 15:04:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1584 states. [2020-09-24 15:04:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2092 transitions. [2020-09-24 15:04:24,694 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2092 transitions. Word has length 176 [2020-09-24 15:04:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:24,697 INFO L479 AbstractCegarLoop]: Abstraction has 1584 states and 2092 transitions. [2020-09-24 15:04:24,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:04:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2092 transitions. [2020-09-24 15:04:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-09-24 15:04:24,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:24,710 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, 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, 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 15:04:24,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:04:24,710 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:24,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:24,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1103889205, now seen corresponding path program 1 times [2020-09-24 15:04:24,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:24,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753971304] [2020-09-24 15:04:24,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:24,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:24,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:25,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:04:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 114 proven. 71 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 15:04:25,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753971304] [2020-09-24 15:04:25,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:25,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:04:25,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3165429] [2020-09-24 15:04:25,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:04:25,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:25,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:04:25,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:04:25,154 INFO L87 Difference]: Start difference. First operand 1584 states and 2092 transitions. Second operand 9 states. [2020-09-24 15:04:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:29,873 INFO L93 Difference]: Finished difference Result 4160 states and 5530 transitions. [2020-09-24 15:04:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:04:29,874 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 252 [2020-09-24 15:04:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:29,889 INFO L225 Difference]: With dead ends: 4160 [2020-09-24 15:04:29,890 INFO L226 Difference]: Without dead ends: 2591 [2020-09-24 15:04:29,896 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 15:04:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2020-09-24 15:04:29,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1978. [2020-09-24 15:04:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1978 states. [2020-09-24 15:04:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2539 transitions. [2020-09-24 15:04:29,963 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2539 transitions. Word has length 252 [2020-09-24 15:04:29,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:29,964 INFO L479 AbstractCegarLoop]: Abstraction has 1978 states and 2539 transitions. [2020-09-24 15:04:29,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:04:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2539 transitions. [2020-09-24 15:04:29,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-09-24 15:04:29,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:29,975 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, 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, 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 15:04:29,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:04:29,976 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:29,976 INFO L82 PathProgramCache]: Analyzing trace with hash 236016967, now seen corresponding path program 1 times [2020-09-24 15:04:29,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:29,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715030306] [2020-09-24 15:04:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:30,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:30,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:30,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 15:04:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:30,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-24 15:04:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 171 proven. 136 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-09-24 15:04:30,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715030306] [2020-09-24 15:04:30,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:30,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:04:30,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744785160] [2020-09-24 15:04:30,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:04:30,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:30,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:04:30,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:04:30,575 INFO L87 Difference]: Start difference. First operand 1978 states and 2539 transitions. Second operand 9 states. [2020-09-24 15:04:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:34,933 INFO L93 Difference]: Finished difference Result 4028 states and 5281 transitions. [2020-09-24 15:04:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:04:34,935 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 382 [2020-09-24 15:04:34,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:34,947 INFO L225 Difference]: With dead ends: 4028 [2020-09-24 15:04:34,948 INFO L226 Difference]: Without dead ends: 2447 [2020-09-24 15:04:34,954 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 15:04:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2020-09-24 15:04:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2410. [2020-09-24 15:04:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2410 states. [2020-09-24 15:04:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 3018 transitions. [2020-09-24 15:04:35,031 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 3018 transitions. Word has length 382 [2020-09-24 15:04:35,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:35,032 INFO L479 AbstractCegarLoop]: Abstraction has 2410 states and 3018 transitions. [2020-09-24 15:04:35,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:04:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 3018 transitions. [2020-09-24 15:04:35,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-09-24 15:04:35,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:35,044 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, 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, 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 15:04:35,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:04:35,045 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:35,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1150276446, now seen corresponding path program 1 times [2020-09-24 15:04:35,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:35,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691601491] [2020-09-24 15:04:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:35,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:35,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:35,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-24 15:04:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:35,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-09-24 15:04:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 217 proven. 221 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-24 15:04:35,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691601491] [2020-09-24 15:04:35,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:35,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:04:35,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309982619] [2020-09-24 15:04:35,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:04:35,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:35,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:04:36,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:04:36,000 INFO L87 Difference]: Start difference. First operand 2410 states and 3018 transitions. Second operand 11 states. [2020-09-24 15:04:41,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:41,460 INFO L93 Difference]: Finished difference Result 5421 states and 6855 transitions. [2020-09-24 15:04:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 15:04:41,461 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 392 [2020-09-24 15:04:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:41,477 INFO L225 Difference]: With dead ends: 5421 [2020-09-24 15:04:41,478 INFO L226 Difference]: Without dead ends: 3260 [2020-09-24 15:04:41,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2020-09-24 15:04:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2020-09-24 15:04:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 3204. [2020-09-24 15:04:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3204 states. [2020-09-24 15:04:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 3876 transitions. [2020-09-24 15:04:41,566 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 3876 transitions. Word has length 392 [2020-09-24 15:04:41,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:41,567 INFO L479 AbstractCegarLoop]: Abstraction has 3204 states and 3876 transitions. [2020-09-24 15:04:41,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:04:41,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 3876 transitions. [2020-09-24 15:04:41,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2020-09-24 15:04:41,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:41,582 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, 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, 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 15:04:41,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:04:41,583 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:41,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1671549067, now seen corresponding path program 1 times [2020-09-24 15:04:41,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:41,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48810273] [2020-09-24 15:04:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:41,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:41,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:41,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:04:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:41,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 15:04:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:41,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-09-24 15:04:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 533 proven. 2 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2020-09-24 15:04:42,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48810273] [2020-09-24 15:04:42,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:42,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:04:42,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107376978] [2020-09-24 15:04:42,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:04:42,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:42,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:04:42,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:04:42,128 INFO L87 Difference]: Start difference. First operand 3204 states and 3876 transitions. Second operand 7 states. [2020-09-24 15:04:46,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:46,521 INFO L93 Difference]: Finished difference Result 7056 states and 8950 transitions. [2020-09-24 15:04:46,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:04:46,522 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 535 [2020-09-24 15:04:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:46,543 INFO L225 Difference]: With dead ends: 7056 [2020-09-24 15:04:46,543 INFO L226 Difference]: Without dead ends: 4249 [2020-09-24 15:04:46,554 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 15:04:46,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2020-09-24 15:04:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 4010. [2020-09-24 15:04:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4010 states. [2020-09-24 15:04:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4010 states to 4010 states and 4864 transitions. [2020-09-24 15:04:46,653 INFO L78 Accepts]: Start accepts. Automaton has 4010 states and 4864 transitions. Word has length 535 [2020-09-24 15:04:46,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:46,654 INFO L479 AbstractCegarLoop]: Abstraction has 4010 states and 4864 transitions. [2020-09-24 15:04:46,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:04:46,654 INFO L276 IsEmpty]: Start isEmpty. Operand 4010 states and 4864 transitions. [2020-09-24 15:04:46,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2020-09-24 15:04:46,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:46,674 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, 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, 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 15:04:46,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:04:46,674 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:46,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:46,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1767916011, now seen corresponding path program 1 times [2020-09-24 15:04:46,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:46,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035233239] [2020-09-24 15:04:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:46,773 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 0 [2020-09-24 15:04:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:46,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:46,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:04:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:47,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 15:04:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:47,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-09-24 15:04:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 571 proven. 222 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-09-24 15:04:47,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035233239] [2020-09-24 15:04:47,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:47,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 15:04:47,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328054550] [2020-09-24 15:04:47,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 15:04:47,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:47,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 15:04:47,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:04:47,696 INFO L87 Difference]: Start difference. First operand 4010 states and 4864 transitions. Second operand 12 states. [2020-09-24 15:04:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:57,317 INFO L93 Difference]: Finished difference Result 9423 states and 11610 transitions. [2020-09-24 15:04:57,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-24 15:04:57,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 547 [2020-09-24 15:04:57,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:57,347 INFO L225 Difference]: With dead ends: 9423 [2020-09-24 15:04:57,348 INFO L226 Difference]: Without dead ends: 5810 [2020-09-24 15:04:57,359 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 15:04:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5810 states. [2020-09-24 15:04:57,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5810 to 3809. [2020-09-24 15:04:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3809 states. [2020-09-24 15:04:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3809 states to 3809 states and 4607 transitions. [2020-09-24 15:04:57,470 INFO L78 Accepts]: Start accepts. Automaton has 3809 states and 4607 transitions. Word has length 547 [2020-09-24 15:04:57,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:57,471 INFO L479 AbstractCegarLoop]: Abstraction has 3809 states and 4607 transitions. [2020-09-24 15:04:57,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 15:04:57,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3809 states and 4607 transitions. [2020-09-24 15:04:57,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2020-09-24 15:04:57,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:57,496 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, 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, 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 15:04:57,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:04:57,497 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:57,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:57,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1701847328, now seen corresponding path program 1 times [2020-09-24 15:04:57,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:57,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524310489] [2020-09-24 15:04:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:57,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:57,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:57,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:04:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:57,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 15:04:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:57,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 339 [2020-09-24 15:04:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:57,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-09-24 15:04:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 482 proven. 140 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2020-09-24 15:04:58,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524310489] [2020-09-24 15:04:58,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:58,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:04:58,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717516300] [2020-09-24 15:04:58,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:04:58,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:58,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:04:58,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:04:58,150 INFO L87 Difference]: Start difference. First operand 3809 states and 4607 transitions. Second operand 7 states. [2020-09-24 15:05:01,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:05:01,961 INFO L93 Difference]: Finished difference Result 8345 states and 10502 transitions. [2020-09-24 15:05:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:05:01,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 629 [2020-09-24 15:05:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:05:01,989 INFO L225 Difference]: With dead ends: 8345 [2020-09-24 15:05:01,990 INFO L226 Difference]: Without dead ends: 4933 [2020-09-24 15:05:02,001 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 15:05:02,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2020-09-24 15:05:02,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4902. [2020-09-24 15:05:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4902 states. [2020-09-24 15:05:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4902 states to 4902 states and 6054 transitions. [2020-09-24 15:05:02,111 INFO L78 Accepts]: Start accepts. Automaton has 4902 states and 6054 transitions. Word has length 629 [2020-09-24 15:05:02,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:05:02,112 INFO L479 AbstractCegarLoop]: Abstraction has 4902 states and 6054 transitions. [2020-09-24 15:05:02,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:05:02,112 INFO L276 IsEmpty]: Start isEmpty. Operand 4902 states and 6054 transitions. [2020-09-24 15:05:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2020-09-24 15:05:02,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:05:02,126 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, 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, 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 15:05:02,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:05:02,126 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:05:02,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:05:02,127 INFO L82 PathProgramCache]: Analyzing trace with hash -152616271, now seen corresponding path program 1 times [2020-09-24 15:05:02,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:05:02,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479292201] [2020-09-24 15:05:02,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:05:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:02,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:05:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:02,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:05:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:02,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:05:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:02,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 15:05:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:02,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-09-24 15:05:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:02,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 463 [2020-09-24 15:05:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 742 proven. 220 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2020-09-24 15:05:03,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479292201] [2020-09-24 15:05:03,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:05:03,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 15:05:03,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819642767] [2020-09-24 15:05:03,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 15:05:03,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:05:03,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 15:05:03,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:05:03,475 INFO L87 Difference]: Start difference. First operand 4902 states and 6054 transitions. Second operand 13 states. [2020-09-24 15:05:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:05:10,438 INFO L93 Difference]: Finished difference Result 10545 states and 13016 transitions. [2020-09-24 15:05:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 15:05:10,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 630 [2020-09-24 15:05:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:05:10,461 INFO L225 Difference]: With dead ends: 10545 [2020-09-24 15:05:10,462 INFO L226 Difference]: Without dead ends: 5913 [2020-09-24 15:05:10,474 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 15:05:10,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5913 states. [2020-09-24 15:05:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5913 to 5460. [2020-09-24 15:05:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5460 states. [2020-09-24 15:05:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 6579 transitions. [2020-09-24 15:05:10,597 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 6579 transitions. Word has length 630 [2020-09-24 15:05:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:05:10,598 INFO L479 AbstractCegarLoop]: Abstraction has 5460 states and 6579 transitions. [2020-09-24 15:05:10,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 15:05:10,599 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 6579 transitions. [2020-09-24 15:05:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2020-09-24 15:05:10,623 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:05:10,624 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, 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, 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 15:05:10,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:05:10,624 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:05:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:05:10,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1640646942, now seen corresponding path program 1 times [2020-09-24 15:05:10,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:05:10,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942051057] [2020-09-24 15:05:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:05:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:11,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:05:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:11,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:05:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:11,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:05:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:11,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 15:05:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:11,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-09-24 15:05:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:11,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 527 [2020-09-24 15:05:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat