/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/Problem01_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:00:14,499 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-24 15:00:14,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:00:14,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:00:14,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:00:14,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:00:14,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:00:14,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:00:14,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:00:14,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:00:14,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:00:14,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:00:14,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:00:14,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:00:14,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:00:14,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:00:14,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:00:14,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:00:14,631 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 15:00:14,684 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:00:14,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:00:14,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:00:14,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:00:14,688 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:00:14,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:00:14,688 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:00:14,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:00:14,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:00:14,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:00:14,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:00:14,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:00:14,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:00:14,691 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:00:14,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:00:14,691 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:00:14,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:00:14,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:00:14,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:00:14,692 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:00:14,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:00:14,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:00:14,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:00:14,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:00:14,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:00:14,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:00:14,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:00:14,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:00:14,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:00:14,694 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 15:00:15,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:00:15,211 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:00:15,216 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:00:15,218 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:00:15,218 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:00:15,219 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2020-09-24 15:00:15,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8909d0436/4cf855e9479946b493a4891d0a5e3884/FLAG2facca0e6 [2020-09-24 15:00:15,997 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:00:15,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2020-09-24 15:00:16,020 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8909d0436/4cf855e9479946b493a4891d0a5e3884/FLAG2facca0e6 [2020-09-24 15:00:16,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8909d0436/4cf855e9479946b493a4891d0a5e3884 [2020-09-24 15:00:16,268 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:00:16,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:00:16,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:00:16,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:00:16,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:00:16,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:00:16" (1/1) ... [2020-09-24 15:00:16,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3699edcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:00:16, skipping insertion in model container [2020-09-24 15:00:16,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:00:16" (1/1) ... [2020-09-24 15:00:16,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:00:16,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:00:16,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:00:16,846 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:00:17,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:00:17,177 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:00:17,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:00:17 WrapperNode [2020-09-24 15:00:17,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:00:17,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:00:17,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:00:17,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:00:17,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:00:17" (1/1) ... [2020-09-24 15:00:17,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:00:17" (1/1) ... [2020-09-24 15:00:17,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:00:17" (1/1) ... [2020-09-24 15:00:17,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:00:17" (1/1) ... [2020-09-24 15:00:17,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:00:17" (1/1) ... [2020-09-24 15:00:17,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:00:17" (1/1) ... [2020-09-24 15:00:17,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:00:17" (1/1) ... [2020-09-24 15:00:17,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:00:17,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:00:17,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:00:17,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:00:17,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:00:17" (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 15:00:17,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:00:17,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:00:17,469 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 15:00:17,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:00:17,470 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 15:00:17,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:00:17,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:00:17,471 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 15:00:17,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:00:17,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:00:17,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:00:19,288 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:00:19,289 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:00:19,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:00:19 BoogieIcfgContainer [2020-09-24 15:00:19,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:00:19,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:00:19,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:00:19,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:00:19,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:00:16" (1/3) ... [2020-09-24 15:00:19,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f6c816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:00:19, skipping insertion in model container [2020-09-24 15:00:19,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:00:17" (2/3) ... [2020-09-24 15:00:19,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f6c816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:00:19, skipping insertion in model container [2020-09-24 15:00:19,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:00:19" (3/3) ... [2020-09-24 15:00:19,308 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label38.c [2020-09-24 15:00:19,321 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:00:19,332 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:00:19,357 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:00:19,394 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:00:19,395 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:00:19,398 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:00:19,398 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:00:19,398 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:00:19,398 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:00:19,398 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:00:19,398 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:00:19,433 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 15:00:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-24 15:00:19,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:19,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:19,455 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:19,464 INFO L82 PathProgramCache]: Analyzing trace with hash -857113145, now seen corresponding path program 1 times [2020-09-24 15:00:19,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:19,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809263294] [2020-09-24 15:00:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:20,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:20,149 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 15:00:20,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809263294] [2020-09-24 15:00:20,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:00:20,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:00:20,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401453975] [2020-09-24 15:00:20,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:00:20,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:20,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:00:20,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:00:20,191 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 5 states. [2020-09-24 15:00:20,408 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-09-24 15:00:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:23,257 INFO L93 Difference]: Finished difference Result 1360 states and 1895 transitions. [2020-09-24 15:00:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:00:23,260 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-09-24 15:00:23,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:23,288 INFO L225 Difference]: With dead ends: 1360 [2020-09-24 15:00:23,289 INFO L226 Difference]: Without dead ends: 781 [2020-09-24 15:00:23,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:00:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-09-24 15:00:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 746. [2020-09-24 15:00:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2020-09-24 15:00:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 914 transitions. [2020-09-24 15:00:23,417 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 914 transitions. Word has length 110 [2020-09-24 15:00:23,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:23,418 INFO L479 AbstractCegarLoop]: Abstraction has 746 states and 914 transitions. [2020-09-24 15:00:23,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:00:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 914 transitions. [2020-09-24 15:00:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-24 15:00:23,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:23,428 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:23,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:00:23,429 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:23,430 INFO L82 PathProgramCache]: Analyzing trace with hash 550881368, now seen corresponding path program 1 times [2020-09-24 15:00:23,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:23,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302534588] [2020-09-24 15:00:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:23,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:23,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 15:00:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:00:23,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302534588] [2020-09-24 15:00:23,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:00:23,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:00:23,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017853557] [2020-09-24 15:00:23,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:00:23,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:23,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:00:23,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:00:23,647 INFO L87 Difference]: Start difference. First operand 746 states and 914 transitions. Second operand 8 states. [2020-09-24 15:00:26,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:26,278 INFO L93 Difference]: Finished difference Result 1887 states and 2410 transitions. [2020-09-24 15:00:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:00:26,279 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-09-24 15:00:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:26,289 INFO L225 Difference]: With dead ends: 1887 [2020-09-24 15:00:26,290 INFO L226 Difference]: Without dead ends: 1165 [2020-09-24 15:00:26,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:00:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-09-24 15:00:26,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1038. [2020-09-24 15:00:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1038 states. [2020-09-24 15:00:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1317 transitions. [2020-09-24 15:00:26,368 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1317 transitions. Word has length 131 [2020-09-24 15:00:26,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:26,371 INFO L479 AbstractCegarLoop]: Abstraction has 1038 states and 1317 transitions. [2020-09-24 15:00:26,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:00:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1317 transitions. [2020-09-24 15:00:26,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-24 15:00:26,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:26,383 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:26,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:00:26,383 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:26,387 INFO L82 PathProgramCache]: Analyzing trace with hash 703741270, now seen corresponding path program 1 times [2020-09-24 15:00:26,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:26,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264779221] [2020-09-24 15:00:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:26,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:26,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 15:00:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:00:26,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264779221] [2020-09-24 15:00:26,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:00:26,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 15:00:26,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320348246] [2020-09-24 15:00:26,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:00:26,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:26,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:00:26,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:00:26,688 INFO L87 Difference]: Start difference. First operand 1038 states and 1317 transitions. Second operand 5 states. [2020-09-24 15:00:28,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:28,950 INFO L93 Difference]: Finished difference Result 2655 states and 3486 transitions. [2020-09-24 15:00:28,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:00:28,954 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2020-09-24 15:00:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:28,971 INFO L225 Difference]: With dead ends: 2655 [2020-09-24 15:00:28,971 INFO L226 Difference]: Without dead ends: 1641 [2020-09-24 15:00:28,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:00:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2020-09-24 15:00:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1328. [2020-09-24 15:00:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1328 states. [2020-09-24 15:00:29,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 1660 transitions. [2020-09-24 15:00:29,061 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 1660 transitions. Word has length 131 [2020-09-24 15:00:29,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:29,063 INFO L479 AbstractCegarLoop]: Abstraction has 1328 states and 1660 transitions. [2020-09-24 15:00:29,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:00:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 1660 transitions. [2020-09-24 15:00:29,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-24 15:00:29,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:29,069 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:29,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:00:29,069 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:29,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:29,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1687843793, now seen corresponding path program 1 times [2020-09-24 15:00:29,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:29,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145842824] [2020-09-24 15:00:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:29,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:29,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 15:00:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:00:29,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145842824] [2020-09-24 15:00:29,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:00:29,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 15:00:29,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411770597] [2020-09-24 15:00:29,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:00:29,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:29,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:00:29,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:00:29,338 INFO L87 Difference]: Start difference. First operand 1328 states and 1660 transitions. Second operand 5 states. [2020-09-24 15:00:31,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:31,376 INFO L93 Difference]: Finished difference Result 3438 states and 4436 transitions. [2020-09-24 15:00:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:00:31,378 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-09-24 15:00:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:31,391 INFO L225 Difference]: With dead ends: 3438 [2020-09-24 15:00:31,391 INFO L226 Difference]: Without dead ends: 2134 [2020-09-24 15:00:31,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:00:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2020-09-24 15:00:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1900. [2020-09-24 15:00:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1900 states. [2020-09-24 15:00:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 2393 transitions. [2020-09-24 15:00:31,476 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 2393 transitions. Word has length 135 [2020-09-24 15:00:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:31,477 INFO L479 AbstractCegarLoop]: Abstraction has 1900 states and 2393 transitions. [2020-09-24 15:00:31,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:00:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 2393 transitions. [2020-09-24 15:00:31,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-24 15:00:31,485 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:31,486 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:31,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:00:31,486 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:31,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:31,487 INFO L82 PathProgramCache]: Analyzing trace with hash 926609686, now seen corresponding path program 1 times [2020-09-24 15:00:31,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:31,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841338876] [2020-09-24 15:00:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:31,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:31,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 15:00:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:00:31,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841338876] [2020-09-24 15:00:31,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:00:31,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 15:00:31,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033766142] [2020-09-24 15:00:31,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:00:31,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:31,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:00:31,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:00:31,912 INFO L87 Difference]: Start difference. First operand 1900 states and 2393 transitions. Second operand 9 states. [2020-09-24 15:00:32,966 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-09-24 15:00:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:35,623 INFO L93 Difference]: Finished difference Result 4147 states and 5347 transitions. [2020-09-24 15:00:35,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 15:00:35,624 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 176 [2020-09-24 15:00:35,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:35,637 INFO L225 Difference]: With dead ends: 4147 [2020-09-24 15:00:35,637 INFO L226 Difference]: Without dead ends: 2271 [2020-09-24 15:00:35,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-24 15:00:35,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2020-09-24 15:00:35,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1915. [2020-09-24 15:00:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1915 states. [2020-09-24 15:00:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2330 transitions. [2020-09-24 15:00:35,722 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2330 transitions. Word has length 176 [2020-09-24 15:00:35,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:35,722 INFO L479 AbstractCegarLoop]: Abstraction has 1915 states and 2330 transitions. [2020-09-24 15:00:35,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:00:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2330 transitions. [2020-09-24 15:00:35,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-09-24 15:00:35,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:35,734 INFO L422 BasicCegarLoop]: trace histogram [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, 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 15:00:35,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:00:35,734 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:35,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:35,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1319899365, now seen corresponding path program 1 times [2020-09-24 15:00:35,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:35,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122907290] [2020-09-24 15:00:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:35,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:35,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 15:00:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:35,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 15:00:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:00:36,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122907290] [2020-09-24 15:00:36,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:00:36,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:00:36,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169689162] [2020-09-24 15:00:36,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:00:36,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:36,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:00:36,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:00:36,040 INFO L87 Difference]: Start difference. First operand 1915 states and 2330 transitions. Second operand 7 states. [2020-09-24 15:00:38,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:38,729 INFO L93 Difference]: Finished difference Result 4169 states and 5126 transitions. [2020-09-24 15:00:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:00:38,732 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 197 [2020-09-24 15:00:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:38,743 INFO L225 Difference]: With dead ends: 4169 [2020-09-24 15:00:38,743 INFO L226 Difference]: Without dead ends: 2064 [2020-09-24 15:00:38,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:00:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2020-09-24 15:00:38,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1737. [2020-09-24 15:00:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1737 states. [2020-09-24 15:00:38,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2068 transitions. [2020-09-24 15:00:38,810 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2068 transitions. Word has length 197 [2020-09-24 15:00:38,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:38,810 INFO L479 AbstractCegarLoop]: Abstraction has 1737 states and 2068 transitions. [2020-09-24 15:00:38,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:00:38,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2068 transitions. [2020-09-24 15:00:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-24 15:00:38,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:38,817 INFO L422 BasicCegarLoop]: trace histogram [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, 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 15:00:38,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:00:38,818 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:38,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash -350239711, now seen corresponding path program 1 times [2020-09-24 15:00:38,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:38,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919940969] [2020-09-24 15:00:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:38,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:39,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 15:00:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:39,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-24 15:00:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:00:39,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919940969] [2020-09-24 15:00:39,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:00:39,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 15:00:39,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851213560] [2020-09-24 15:00:39,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:00:39,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:39,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:00:39,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:00:39,350 INFO L87 Difference]: Start difference. First operand 1737 states and 2068 transitions. Second operand 10 states. [2020-09-24 15:00:40,360 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-09-24 15:00:41,069 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-09-24 15:00:46,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:46,269 INFO L93 Difference]: Finished difference Result 5157 states and 6584 transitions. [2020-09-24 15:00:46,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 15:00:46,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 205 [2020-09-24 15:00:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:46,293 INFO L225 Difference]: With dead ends: 5157 [2020-09-24 15:00:46,294 INFO L226 Difference]: Without dead ends: 3444 [2020-09-24 15:00:46,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-09-24 15:00:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2020-09-24 15:00:46,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3109. [2020-09-24 15:00:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3109 states. [2020-09-24 15:00:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 3735 transitions. [2020-09-24 15:00:46,408 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 3735 transitions. Word has length 205 [2020-09-24 15:00:46,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:46,409 INFO L479 AbstractCegarLoop]: Abstraction has 3109 states and 3735 transitions. [2020-09-24 15:00:46,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:00:46,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 3735 transitions. [2020-09-24 15:00:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-09-24 15:00:46,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:46,427 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, 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] [2020-09-24 15:00:46,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:00:46,428 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:46,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1568499164, now seen corresponding path program 1 times [2020-09-24 15:00:46,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:46,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965542423] [2020-09-24 15:00:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:46,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:46,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 15:00:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:46,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 15:00:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:00:46,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965542423] [2020-09-24 15:00:46,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:00:46,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:00:46,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090275388] [2020-09-24 15:00:46,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:00:46,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:46,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:00:46,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:00:46,830 INFO L87 Difference]: Start difference. First operand 3109 states and 3735 transitions. Second operand 7 states. [2020-09-24 15:00:49,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:49,959 INFO L93 Difference]: Finished difference Result 9108 states and 11222 transitions. [2020-09-24 15:00:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:00:49,960 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 220 [2020-09-24 15:00:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:49,990 INFO L225 Difference]: With dead ends: 9108 [2020-09-24 15:00:49,990 INFO L226 Difference]: Without dead ends: 5892 [2020-09-24 15:00:50,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:00:50,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2020-09-24 15:00:50,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5542. [2020-09-24 15:00:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5542 states. [2020-09-24 15:00:50,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5542 states to 5542 states and 6648 transitions. [2020-09-24 15:00:50,234 INFO L78 Accepts]: Start accepts. Automaton has 5542 states and 6648 transitions. Word has length 220 [2020-09-24 15:00:50,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:50,235 INFO L479 AbstractCegarLoop]: Abstraction has 5542 states and 6648 transitions. [2020-09-24 15:00:50,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:00:50,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5542 states and 6648 transitions. [2020-09-24 15:00:50,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-09-24 15:00:50,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:50,261 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, 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] [2020-09-24 15:00:50,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:00:50,262 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:50,264 INFO L82 PathProgramCache]: Analyzing trace with hash -703727274, now seen corresponding path program 1 times [2020-09-24 15:00:50,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:50,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198822861] [2020-09-24 15:00:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:50,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:50,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 15:00:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:50,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 15:00:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:00:50,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198822861] [2020-09-24 15:00:50,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:00:50,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:00:50,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935811076] [2020-09-24 15:00:50,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:00:50,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:50,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:00:50,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:00:50,602 INFO L87 Difference]: Start difference. First operand 5542 states and 6648 transitions. Second operand 7 states. [2020-09-24 15:00:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:52,672 INFO L93 Difference]: Finished difference Result 10229 states and 12284 transitions. [2020-09-24 15:00:52,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:00:52,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 223 [2020-09-24 15:00:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:52,696 INFO L225 Difference]: With dead ends: 10229 [2020-09-24 15:00:52,696 INFO L226 Difference]: Without dead ends: 4882 [2020-09-24 15:00:52,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:00:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2020-09-24 15:00:52,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 4431. [2020-09-24 15:00:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4431 states. [2020-09-24 15:00:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4431 states to 4431 states and 5107 transitions. [2020-09-24 15:00:52,884 INFO L78 Accepts]: Start accepts. Automaton has 4431 states and 5107 transitions. Word has length 223 [2020-09-24 15:00:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:52,885 INFO L479 AbstractCegarLoop]: Abstraction has 4431 states and 5107 transitions. [2020-09-24 15:00:52,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:00:52,885 INFO L276 IsEmpty]: Start isEmpty. Operand 4431 states and 5107 transitions. [2020-09-24 15:00:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-09-24 15:00:52,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:52,901 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, 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] [2020-09-24 15:00:52,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:00:52,901 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:52,902 INFO L82 PathProgramCache]: Analyzing trace with hash -224647721, now seen corresponding path program 1 times [2020-09-24 15:00:52,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:52,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014998713] [2020-09-24 15:00:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:53,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:53,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 15:00:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:53,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-24 15:00:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:00:53,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014998713] [2020-09-24 15:00:53,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:00:53,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:00:53,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035295561] [2020-09-24 15:00:53,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:00:53,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:53,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:00:53,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:00:53,314 INFO L87 Difference]: Start difference. First operand 4431 states and 5107 transitions. Second operand 9 states. [2020-09-24 15:00:56,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:56,758 INFO L93 Difference]: Finished difference Result 9354 states and 10817 transitions. [2020-09-24 15:00:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:00:56,760 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 226 [2020-09-24 15:00:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:56,792 INFO L225 Difference]: With dead ends: 9354 [2020-09-24 15:00:56,793 INFO L226 Difference]: Without dead ends: 5088 [2020-09-24 15:00:56,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:00:56,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2020-09-24 15:00:56,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4872. [2020-09-24 15:00:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4872 states. [2020-09-24 15:00:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 5607 transitions. [2020-09-24 15:00:56,922 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 5607 transitions. Word has length 226 [2020-09-24 15:00:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:56,923 INFO L479 AbstractCegarLoop]: Abstraction has 4872 states and 5607 transitions. [2020-09-24 15:00:56,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:00:56,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 5607 transitions. [2020-09-24 15:00:56,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-09-24 15:00:56,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:56,939 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, 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 15:00:56,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 15:00:56,939 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:56,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:56,940 INFO L82 PathProgramCache]: Analyzing trace with hash -685843220, now seen corresponding path program 1 times [2020-09-24 15:00:56,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:56,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777166527] [2020-09-24 15:00:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:57,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:57,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 15:00:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:57,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:00:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:00:57,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777166527] [2020-09-24 15:00:57,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:00:57,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 15:00:57,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899937020] [2020-09-24 15:00:57,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:00:57,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:57,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:00:57,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:00:57,339 INFO L87 Difference]: Start difference. First operand 4872 states and 5607 transitions. Second operand 8 states. [2020-09-24 15:01:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:01:00,459 INFO L93 Difference]: Finished difference Result 10160 states and 11696 transitions. [2020-09-24 15:01:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:01:00,463 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 243 [2020-09-24 15:01:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:01:00,482 INFO L225 Difference]: With dead ends: 10160 [2020-09-24 15:01:00,482 INFO L226 Difference]: Without dead ends: 5172 [2020-09-24 15:01:00,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:01:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2020-09-24 15:01:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 5068. [2020-09-24 15:01:00,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5068 states. [2020-09-24 15:01:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5068 states to 5068 states and 5658 transitions. [2020-09-24 15:01:00,609 INFO L78 Accepts]: Start accepts. Automaton has 5068 states and 5658 transitions. Word has length 243 [2020-09-24 15:01:00,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:01:00,609 INFO L479 AbstractCegarLoop]: Abstraction has 5068 states and 5658 transitions. [2020-09-24 15:01:00,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:01:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 5068 states and 5658 transitions. [2020-09-24 15:01:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-09-24 15:01:00,623 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:01:00,624 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 15:01:00,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:01:00,624 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:01:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:01:00,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1910271732, now seen corresponding path program 1 times [2020-09-24 15:01:00,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:01:00,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412845389] [2020-09-24 15:01:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:01:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:00,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:01:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:00,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 15:01:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:00,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 15:01:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:00,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-24 15:01:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 133 proven. 3 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-09-24 15:01:00,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412845389] [2020-09-24 15:01:00,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:01:00,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 15:01:00,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176787556] [2020-09-24 15:01:00,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:01:00,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:01:00,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:01:00,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:01:00,954 INFO L87 Difference]: Start difference. First operand 5068 states and 5658 transitions. Second operand 5 states. [2020-09-24 15:01:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:01:02,787 INFO L93 Difference]: Finished difference Result 9991 states and 11159 transitions. [2020-09-24 15:01:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:01:02,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 252 [2020-09-24 15:01:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:01:02,799 INFO L225 Difference]: With dead ends: 9991 [2020-09-24 15:01:02,799 INFO L226 Difference]: Without dead ends: 5088 [2020-09-24 15:01:02,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:01:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2020-09-24 15:01:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4927. [2020-09-24 15:01:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4927 states. [2020-09-24 15:01:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 5433 transitions. [2020-09-24 15:01:02,920 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 5433 transitions. Word has length 252 [2020-09-24 15:01:02,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:01:02,921 INFO L479 AbstractCegarLoop]: Abstraction has 4927 states and 5433 transitions. [2020-09-24 15:01:02,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:01:02,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 5433 transitions. [2020-09-24 15:01:02,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-09-24 15:01:02,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:01:02,935 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:01:02,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 15:01:02,935 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:01:02,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:01:02,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1539255752, now seen corresponding path program 1 times [2020-09-24 15:01:02,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:01:02,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824653719] [2020-09-24 15:01:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:01:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:03,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:01:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:03,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 15:01:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:03,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 15:01:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:03,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-24 15:01:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 196 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 15:01:03,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824653719] [2020-09-24 15:01:03,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:01:03,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:01:03,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358630378] [2020-09-24 15:01:03,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:01:03,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:01:03,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:01:03,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:01:03,471 INFO L87 Difference]: Start difference. First operand 4927 states and 5433 transitions. Second operand 11 states. [2020-09-24 15:01:03,826 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-09-24 15:01:04,130 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2020-09-24 15:01:05,031 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-09-24 15:01:05,459 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-09-24 15:01:06,108 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-09-24 15:01:06,682 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-09-24 15:01:07,202 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2020-09-24 15:01:07,988 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-09-24 15:01:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:01:10,807 INFO L93 Difference]: Finished difference Result 10659 states and 12038 transitions. [2020-09-24 15:01:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 15:01:10,808 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 256 [2020-09-24 15:01:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:01:10,828 INFO L225 Difference]: With dead ends: 10659 [2020-09-24 15:01:10,829 INFO L226 Difference]: Without dead ends: 5897 [2020-09-24 15:01:10,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 15:01:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5897 states. [2020-09-24 15:01:10,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5897 to 4936. [2020-09-24 15:01:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4936 states. [2020-09-24 15:01:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4936 states to 4936 states and 5392 transitions. [2020-09-24 15:01:10,960 INFO L78 Accepts]: Start accepts. Automaton has 4936 states and 5392 transitions. Word has length 256 [2020-09-24 15:01:10,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:01:10,961 INFO L479 AbstractCegarLoop]: Abstraction has 4936 states and 5392 transitions. [2020-09-24 15:01:10,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:01:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4936 states and 5392 transitions. [2020-09-24 15:01:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-09-24 15:01:10,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:01:10,979 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:01:10,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 15:01:10,980 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:01:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:01:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1866945516, now seen corresponding path program 1 times [2020-09-24 15:01:10,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:01:10,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988883911] [2020-09-24 15:01:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:01:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:11,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:01:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:11,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 15:01:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:11,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 15:01:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:11,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-24 15:01:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:11,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-24 15:01:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:01:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 216 proven. 60 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-09-24 15:01:11,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988883911] [2020-09-24 15:01:11,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:01:11,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:01:11,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448836675] [2020-09-24 15:01:11,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:01:11,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:01:11,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:01:11,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:01:11,331 INFO L87 Difference]: Start difference. First operand 4936 states and 5392 transitions. Second operand 7 states.