/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:11:21,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:11:21,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:11:21,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:11:21,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:11:21,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:11:21,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:11:21,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:11:21,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:11:21,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:11:21,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:11:21,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:11:21,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:11:21,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:11:21,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:11:21,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:11:21,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:11:21,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:11:21,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:11:21,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:11:21,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:11:21,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:11:21,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:11:21,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:11:21,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:11:21,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:11:21,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:11:21,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:11:21,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:11:21,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:11:21,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:11:21,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:11:21,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:11:21,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:11:21,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:11:21,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:11:21,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:11:21,403 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:11:21,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:11:21,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:11:21,404 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:11:21,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:11:21,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:11:21,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:11:21,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:11:21,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:11:21,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:11:21,406 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:11:21,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:11:21,406 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:11:21,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:11:21,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:11:21,407 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:11:21,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:11:21,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:11:21,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:11:21,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:11:21,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:11:21,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:11:21,408 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-09-04 23:11:21,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:11:21,879 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:11:21,883 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:11:21,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:11:21,885 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:11:21,887 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-04 23:11:21,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2a7569da/41c92cd52d5c4dbbab7d6b05887364ad/FLAG897d99cbb [2020-09-04 23:11:22,506 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:11:22,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-04 23:11:22,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2a7569da/41c92cd52d5c4dbbab7d6b05887364ad/FLAG897d99cbb [2020-09-04 23:11:22,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2a7569da/41c92cd52d5c4dbbab7d6b05887364ad [2020-09-04 23:11:22,858 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:11:22,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:11:22,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:11:22,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:11:22,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:11:22,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:11:22" (1/1) ... [2020-09-04 23:11:22,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb90c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:22, skipping insertion in model container [2020-09-04 23:11:22,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:11:22" (1/1) ... [2020-09-04 23:11:22,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:11:22,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:11:23,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:11:23,120 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:11:23,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:11:23,163 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:11:23,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:23 WrapperNode [2020-09-04 23:11:23,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:11:23,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:11:23,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:11:23,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:11:23,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:23" (1/1) ... [2020-09-04 23:11:23,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:23" (1/1) ... [2020-09-04 23:11:23,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:23" (1/1) ... [2020-09-04 23:11:23,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:23" (1/1) ... [2020-09-04 23:11:23,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:23" (1/1) ... [2020-09-04 23:11:23,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:23" (1/1) ... [2020-09-04 23:11:23,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:23" (1/1) ... [2020-09-04 23:11:23,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:11:23,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:11:23,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:11:23,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:11:23,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:23" (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 [2020-09-04 23:11:23,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:11:23,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:11:23,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:11:23,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:11:23,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:11:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:11:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:11:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:11:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 23:11:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 23:11:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 23:11:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:11:23,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:11:23,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:11:23,627 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:11:23,627 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 23:11:23,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:11:23 BoogieIcfgContainer [2020-09-04 23:11:23,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:11:23,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:11:23,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:11:23,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:11:23,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:11:22" (1/3) ... [2020-09-04 23:11:23,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306fac39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:11:23, skipping insertion in model container [2020-09-04 23:11:23,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:23" (2/3) ... [2020-09-04 23:11:23,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306fac39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:11:23, skipping insertion in model container [2020-09-04 23:11:23,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:11:23" (3/3) ... [2020-09-04 23:11:23,643 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-09-04 23:11:23,669 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:11:23,693 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:11:23,727 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:11:23,766 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:11:23,766 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:11:23,766 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:11:23,766 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:11:23,767 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:11:23,767 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:11:23,767 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:11:23,767 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:11:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-09-04 23:11:23,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-04 23:11:23,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:23,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:23,796 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:23,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:23,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2145994368, now seen corresponding path program 1 times [2020-09-04 23:11:23,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:23,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929377810] [2020-09-04 23:11:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:24,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929377810] [2020-09-04 23:11:24,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:24,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:11:24,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935819466] [2020-09-04 23:11:24,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:11:24,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:24,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:11:24,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:11:24,096 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-09-04 23:11:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:24,220 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-09-04 23:11:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:11:24,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-04 23:11:24,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:24,234 INFO L225 Difference]: With dead ends: 61 [2020-09-04 23:11:24,234 INFO L226 Difference]: Without dead ends: 31 [2020-09-04 23:11:24,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:11:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-04 23:11:24,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-04 23:11:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-04 23:11:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-09-04 23:11:24,291 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-09-04 23:11:24,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:24,292 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-09-04 23:11:24,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:11:24,292 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-09-04 23:11:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 23:11:24,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:24,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:24,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:11:24,294 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:24,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2141881988, now seen corresponding path program 1 times [2020-09-04 23:11:24,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:24,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529453351] [2020-09-04 23:11:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:24,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529453351] [2020-09-04 23:11:24,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:24,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 23:11:24,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989606018] [2020-09-04 23:11:24,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 23:11:24,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:24,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 23:11:24,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:11:24,383 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-09-04 23:11:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:24,493 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-09-04 23:11:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 23:11:24,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-09-04 23:11:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:24,498 INFO L225 Difference]: With dead ends: 59 [2020-09-04 23:11:24,498 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 23:11:24,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:11:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 23:11:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-09-04 23:11:24,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 23:11:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-04 23:11:24,511 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 19 [2020-09-04 23:11:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:24,512 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-04 23:11:24,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 23:11:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-04 23:11:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 23:11:24,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:24,514 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] [2020-09-04 23:11:24,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:11:24,515 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:24,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1000622251, now seen corresponding path program 1 times [2020-09-04 23:11:24,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:24,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707464178] [2020-09-04 23:11:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:24,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707464178] [2020-09-04 23:11:24,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:24,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 23:11:24,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803732369] [2020-09-04 23:11:24,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:11:24,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:24,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:11:24,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:11:24,630 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2020-09-04 23:11:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:24,777 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-09-04 23:11:24,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 23:11:24,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-09-04 23:11:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:24,779 INFO L225 Difference]: With dead ends: 70 [2020-09-04 23:11:24,780 INFO L226 Difference]: Without dead ends: 52 [2020-09-04 23:11:24,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:11:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-04 23:11:24,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-09-04 23:11:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-04 23:11:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-09-04 23:11:24,792 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2020-09-04 23:11:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:24,792 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-09-04 23:11:24,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:11:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-09-04 23:11:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 23:11:24,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:24,794 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 23:11:24,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:11:24,795 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:24,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:24,795 INFO L82 PathProgramCache]: Analyzing trace with hash 231352676, now seen corresponding path program 2 times [2020-09-04 23:11:24,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:24,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889738610] [2020-09-04 23:11:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:24,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889738610] [2020-09-04 23:11:24,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:24,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:11:24,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083117197] [2020-09-04 23:11:24,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:11:24,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:24,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:11:24,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:11:24,914 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 8 states. [2020-09-04 23:11:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:25,095 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-09-04 23:11:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 23:11:25,095 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-04 23:11:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:25,097 INFO L225 Difference]: With dead ends: 77 [2020-09-04 23:11:25,097 INFO L226 Difference]: Without dead ends: 59 [2020-09-04 23:11:25,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:11:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-04 23:11:25,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2020-09-04 23:11:25,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 23:11:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-09-04 23:11:25,108 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 33 [2020-09-04 23:11:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:25,109 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-09-04 23:11:25,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:11:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-09-04 23:11:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-04 23:11:25,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:25,111 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:25,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:11:25,111 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:25,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:25,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1221138549, now seen corresponding path program 3 times [2020-09-04 23:11:25,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:25,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109416539] [2020-09-04 23:11:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:25,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-04 23:11:25,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109416539] [2020-09-04 23:11:25,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:25,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 23:11:25,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411827277] [2020-09-04 23:11:25,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:11:25,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:25,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:11:25,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:11:25,215 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 6 states. [2020-09-04 23:11:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:25,339 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-09-04 23:11:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:11:25,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-09-04 23:11:25,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:25,341 INFO L225 Difference]: With dead ends: 58 [2020-09-04 23:11:25,341 INFO L226 Difference]: Without dead ends: 52 [2020-09-04 23:11:25,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:11:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-04 23:11:25,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-09-04 23:11:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 23:11:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-09-04 23:11:25,351 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 40 [2020-09-04 23:11:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:25,351 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-09-04 23:11:25,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:11:25,351 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-09-04 23:11:25,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-04 23:11:25,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:25,353 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:25,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:11:25,354 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:25,354 INFO L82 PathProgramCache]: Analyzing trace with hash -842063729, now seen corresponding path program 1 times [2020-09-04 23:11:25,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:25,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890513333] [2020-09-04 23:11:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:25,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-04 23:11:25,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890513333] [2020-09-04 23:11:25,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:25,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:11:25,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141731914] [2020-09-04 23:11:25,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:11:25,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:25,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:11:25,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:11:25,487 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 8 states. [2020-09-04 23:11:25,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:25,635 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-09-04 23:11:25,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:11:25,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-09-04 23:11:25,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:25,637 INFO L225 Difference]: With dead ends: 68 [2020-09-04 23:11:25,637 INFO L226 Difference]: Without dead ends: 59 [2020-09-04 23:11:25,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:11:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-04 23:11:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-09-04 23:11:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 23:11:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-04 23:11:25,647 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 47 [2020-09-04 23:11:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:25,647 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-04 23:11:25,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:11:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-04 23:11:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-04 23:11:25,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:25,650 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:25,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:11:25,650 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:25,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:25,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1280223029, now seen corresponding path program 2 times [2020-09-04 23:11:25,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:25,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344360166] [2020-09-04 23:11:25,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:25,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:25,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344360166] [2020-09-04 23:11:25,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:25,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:11:25,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980299461] [2020-09-04 23:11:25,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:11:25,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:25,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:11:25,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:11:25,776 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 10 states. [2020-09-04 23:11:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:26,000 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2020-09-04 23:11:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 23:11:26,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-09-04 23:11:26,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:26,002 INFO L225 Difference]: With dead ends: 94 [2020-09-04 23:11:26,002 INFO L226 Difference]: Without dead ends: 69 [2020-09-04 23:11:26,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:11:26,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-04 23:11:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-09-04 23:11:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 23:11:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-04 23:11:26,012 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 54 [2020-09-04 23:11:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:26,013 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-04 23:11:26,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:11:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-04 23:11:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 23:11:26,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:26,015 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:26,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 23:11:26,015 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:26,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1143766212, now seen corresponding path program 3 times [2020-09-04 23:11:26,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:26,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731243303] [2020-09-04 23:11:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:26,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:26,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731243303] [2020-09-04 23:11:26,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:26,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 23:11:26,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593781299] [2020-09-04 23:11:26,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 23:11:26,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:26,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 23:11:26,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:11:26,160 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 12 states. [2020-09-04 23:11:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:26,351 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2020-09-04 23:11:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 23:11:26,351 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-09-04 23:11:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:26,353 INFO L225 Difference]: With dead ends: 101 [2020-09-04 23:11:26,353 INFO L226 Difference]: Without dead ends: 76 [2020-09-04 23:11:26,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-04 23:11:26,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-04 23:11:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-09-04 23:11:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-04 23:11:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-04 23:11:26,363 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 61 [2020-09-04 23:11:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:26,363 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-04 23:11:26,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 23:11:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-04 23:11:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-04 23:11:26,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:26,365 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:26,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 23:11:26,365 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:26,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:26,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1966270379, now seen corresponding path program 4 times [2020-09-04 23:11:26,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:26,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789351136] [2020-09-04 23:11:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:26,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:26,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789351136] [2020-09-04 23:11:26,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:26,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-04 23:11:26,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441337922] [2020-09-04 23:11:26,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 23:11:26,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 23:11:26,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-04 23:11:26,528 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 14 states. [2020-09-04 23:11:26,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:26,822 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-09-04 23:11:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 23:11:26,822 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-09-04 23:11:26,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:26,824 INFO L225 Difference]: With dead ends: 108 [2020-09-04 23:11:26,824 INFO L226 Difference]: Without dead ends: 83 [2020-09-04 23:11:26,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-04 23:11:26,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-04 23:11:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-09-04 23:11:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-04 23:11:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-04 23:11:26,834 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-09-04 23:11:26,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:26,835 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-04 23:11:26,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 23:11:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-04 23:11:26,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-04 23:11:26,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:26,836 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:26,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 23:11:26,836 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:26,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:26,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1126004828, now seen corresponding path program 5 times [2020-09-04 23:11:26,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:26,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718718779] [2020-09-04 23:11:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:27,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:27,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718718779] [2020-09-04 23:11:27,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:27,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 23:11:27,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953479729] [2020-09-04 23:11:27,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 23:11:27,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:27,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 23:11:27,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:11:27,068 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 16 states. [2020-09-04 23:11:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:27,432 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2020-09-04 23:11:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 23:11:27,432 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-09-04 23:11:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:27,434 INFO L225 Difference]: With dead ends: 115 [2020-09-04 23:11:27,434 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 23:11:27,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-04 23:11:27,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 23:11:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-04 23:11:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-04 23:11:27,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-09-04 23:11:27,445 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 75 [2020-09-04 23:11:27,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:27,446 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-09-04 23:11:27,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 23:11:27,446 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-09-04 23:11:27,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-04 23:11:27,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:27,447 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:27,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 23:11:27,448 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:27,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:27,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1440804491, now seen corresponding path program 6 times [2020-09-04 23:11:27,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:27,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455425698] [2020-09-04 23:11:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:27,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:27,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455425698] [2020-09-04 23:11:27,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:27,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-04 23:11:27,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304096667] [2020-09-04 23:11:27,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 23:11:27,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:27,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 23:11:27,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-04 23:11:27,726 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 18 states. [2020-09-04 23:11:28,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:28,079 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-09-04 23:11:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 23:11:28,080 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-09-04 23:11:28,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:28,081 INFO L225 Difference]: With dead ends: 122 [2020-09-04 23:11:28,081 INFO L226 Difference]: Without dead ends: 97 [2020-09-04 23:11:28,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-04 23:11:28,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-04 23:11:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2020-09-04 23:11:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-04 23:11:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-09-04 23:11:28,103 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 82 [2020-09-04 23:11:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:28,103 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-09-04 23:11:28,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 23:11:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-09-04 23:11:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-04 23:11:28,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:28,110 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:28,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 23:11:28,111 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:28,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:28,111 INFO L82 PathProgramCache]: Analyzing trace with hash -247723388, now seen corresponding path program 7 times [2020-09-04 23:11:28,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:28,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286355706] [2020-09-04 23:11:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:28,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:28,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286355706] [2020-09-04 23:11:28,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:28,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-04 23:11:28,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133865545] [2020-09-04 23:11:28,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 23:11:28,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:28,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 23:11:28,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-04 23:11:28,403 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 20 states. [2020-09-04 23:11:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:28,837 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2020-09-04 23:11:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 23:11:28,838 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-09-04 23:11:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:28,839 INFO L225 Difference]: With dead ends: 129 [2020-09-04 23:11:28,839 INFO L226 Difference]: Without dead ends: 104 [2020-09-04 23:11:28,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 23:11:28,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-04 23:11:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2020-09-04 23:11:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-04 23:11:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-09-04 23:11:28,848 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 89 [2020-09-04 23:11:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:28,848 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-09-04 23:11:28,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 23:11:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-09-04 23:11:28,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-04 23:11:28,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:28,849 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:28,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 23:11:28,850 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:28,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:28,850 INFO L82 PathProgramCache]: Analyzing trace with hash -847867243, now seen corresponding path program 8 times [2020-09-04 23:11:28,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:28,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616232803] [2020-09-04 23:11:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:29,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:29,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616232803] [2020-09-04 23:11:29,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:29,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 23:11:29,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539590264] [2020-09-04 23:11:29,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 23:11:29,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:29,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 23:11:29,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-04 23:11:29,144 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 22 states. [2020-09-04 23:11:29,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:29,728 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2020-09-04 23:11:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 23:11:29,728 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 96 [2020-09-04 23:11:29,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:29,730 INFO L225 Difference]: With dead ends: 136 [2020-09-04 23:11:29,730 INFO L226 Difference]: Without dead ends: 111 [2020-09-04 23:11:29,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 23:11:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-04 23:11:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2020-09-04 23:11:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-04 23:11:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-09-04 23:11:29,739 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 96 [2020-09-04 23:11:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:29,740 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-09-04 23:11:29,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 23:11:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-09-04 23:11:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-04 23:11:29,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:29,741 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:29,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 23:11:29,742 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:29,742 INFO L82 PathProgramCache]: Analyzing trace with hash 566691172, now seen corresponding path program 9 times [2020-09-04 23:11:29,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:29,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023715142] [2020-09-04 23:11:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:30,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:30,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023715142] [2020-09-04 23:11:30,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:30,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-04 23:11:30,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774451244] [2020-09-04 23:11:30,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 23:11:30,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:30,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 23:11:30,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-04 23:11:30,098 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 24 states. [2020-09-04 23:11:30,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:30,706 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-09-04 23:11:30,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 23:11:30,706 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 103 [2020-09-04 23:11:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:30,708 INFO L225 Difference]: With dead ends: 143 [2020-09-04 23:11:30,708 INFO L226 Difference]: Without dead ends: 118 [2020-09-04 23:11:30,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 23:11:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-04 23:11:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-09-04 23:11:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-04 23:11:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-09-04 23:11:30,725 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 103 [2020-09-04 23:11:30,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:30,727 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-09-04 23:11:30,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 23:11:30,727 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-09-04 23:11:30,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-04 23:11:30,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:30,730 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:30,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 23:11:30,731 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:30,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:30,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1736074315, now seen corresponding path program 10 times [2020-09-04 23:11:30,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:30,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653059254] [2020-09-04 23:11:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:31,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:31,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653059254] [2020-09-04 23:11:31,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:31,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-04 23:11:31,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210715033] [2020-09-04 23:11:31,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 23:11:31,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:31,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 23:11:31,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-04 23:11:31,180 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 26 states. [2020-09-04 23:11:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:31,988 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2020-09-04 23:11:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-04 23:11:31,988 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 110 [2020-09-04 23:11:31,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:31,990 INFO L225 Difference]: With dead ends: 150 [2020-09-04 23:11:31,990 INFO L226 Difference]: Without dead ends: 125 [2020-09-04 23:11:31,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 23:11:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-04 23:11:32,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2020-09-04 23:11:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-04 23:11:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-09-04 23:11:32,001 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 110 [2020-09-04 23:11:32,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:32,002 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-09-04 23:11:32,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 23:11:32,002 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-09-04 23:11:32,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-04 23:11:32,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:32,003 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:32,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 23:11:32,004 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:32,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2123462724, now seen corresponding path program 11 times [2020-09-04 23:11:32,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:32,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974821579] [2020-09-04 23:11:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:32,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:32,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974821579] [2020-09-04 23:11:32,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:32,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-04 23:11:32,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202060534] [2020-09-04 23:11:32,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 23:11:32,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:32,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 23:11:32,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-04 23:11:32,498 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 28 states. [2020-09-04 23:11:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:33,350 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2020-09-04 23:11:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-04 23:11:33,351 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 117 [2020-09-04 23:11:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:33,352 INFO L225 Difference]: With dead ends: 157 [2020-09-04 23:11:33,352 INFO L226 Difference]: Without dead ends: 132 [2020-09-04 23:11:33,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 23:11:33,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-04 23:11:33,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2020-09-04 23:11:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-04 23:11:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-09-04 23:11:33,360 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 117 [2020-09-04 23:11:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:33,361 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-09-04 23:11:33,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 23:11:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-09-04 23:11:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-04 23:11:33,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:33,362 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:33,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 23:11:33,363 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:33,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:33,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1333669077, now seen corresponding path program 12 times [2020-09-04 23:11:33,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:33,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340348232] [2020-09-04 23:11:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:33,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:33,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340348232] [2020-09-04 23:11:33,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:33,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-04 23:11:33,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106613859] [2020-09-04 23:11:33,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 23:11:33,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:33,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 23:11:33,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-04 23:11:33,877 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 30 states. [2020-09-04 23:11:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:34,679 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2020-09-04 23:11:34,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-04 23:11:34,679 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 124 [2020-09-04 23:11:34,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:34,680 INFO L225 Difference]: With dead ends: 164 [2020-09-04 23:11:34,681 INFO L226 Difference]: Without dead ends: 139 [2020-09-04 23:11:34,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 23:11:34,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-04 23:11:34,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2020-09-04 23:11:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-04 23:11:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-09-04 23:11:34,690 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 124 [2020-09-04 23:11:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:34,690 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-09-04 23:11:34,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 23:11:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-09-04 23:11:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-04 23:11:34,692 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:34,692 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:34,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 23:11:34,692 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:34,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:34,693 INFO L82 PathProgramCache]: Analyzing trace with hash 120152868, now seen corresponding path program 13 times [2020-09-04 23:11:34,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:34,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578691456] [2020-09-04 23:11:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:35,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:35,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578691456] [2020-09-04 23:11:35,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:35,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 23:11:35,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579306837] [2020-09-04 23:11:35,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 23:11:35,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:35,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 23:11:35,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-04 23:11:35,240 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 32 states. [2020-09-04 23:11:36,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:36,240 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2020-09-04 23:11:36,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-04 23:11:36,241 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 131 [2020-09-04 23:11:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:36,242 INFO L225 Difference]: With dead ends: 171 [2020-09-04 23:11:36,242 INFO L226 Difference]: Without dead ends: 146 [2020-09-04 23:11:36,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 23:11:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-04 23:11:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 141. [2020-09-04 23:11:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-04 23:11:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-09-04 23:11:36,254 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 131 [2020-09-04 23:11:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:36,255 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-09-04 23:11:36,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 23:11:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-09-04 23:11:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-09-04 23:11:36,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:36,256 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:36,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 23:11:36,257 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:36,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:36,257 INFO L82 PathProgramCache]: Analyzing trace with hash -149797387, now seen corresponding path program 14 times [2020-09-04 23:11:36,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:36,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983958863] [2020-09-04 23:11:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:36,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:36,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983958863] [2020-09-04 23:11:36,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:36,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 23:11:36,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332410597] [2020-09-04 23:11:36,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 23:11:36,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:36,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 23:11:36,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 23:11:36,869 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 34 states. [2020-09-04 23:11:38,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:38,105 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2020-09-04 23:11:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-04 23:11:38,106 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 138 [2020-09-04 23:11:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:38,107 INFO L225 Difference]: With dead ends: 178 [2020-09-04 23:11:38,107 INFO L226 Difference]: Without dead ends: 153 [2020-09-04 23:11:38,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 23:11:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-04 23:11:38,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2020-09-04 23:11:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-04 23:11:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2020-09-04 23:11:38,117 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 138 [2020-09-04 23:11:38,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:38,117 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2020-09-04 23:11:38,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 23:11:38,118 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2020-09-04 23:11:38,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-04 23:11:38,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:38,119 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:38,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 23:11:38,120 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:38,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1788659204, now seen corresponding path program 15 times [2020-09-04 23:11:38,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:38,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622802710] [2020-09-04 23:11:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:38,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:38,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622802710] [2020-09-04 23:11:38,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:38,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 23:11:38,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847860255] [2020-09-04 23:11:38,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 23:11:38,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:38,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 23:11:38,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 23:11:38,779 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 36 states. [2020-09-04 23:11:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:40,106 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2020-09-04 23:11:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-04 23:11:40,106 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 145 [2020-09-04 23:11:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:40,108 INFO L225 Difference]: With dead ends: 185 [2020-09-04 23:11:40,108 INFO L226 Difference]: Without dead ends: 160 [2020-09-04 23:11:40,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 23:11:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-04 23:11:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2020-09-04 23:11:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-04 23:11:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2020-09-04 23:11:40,116 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 145 [2020-09-04 23:11:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:40,116 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2020-09-04 23:11:40,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 23:11:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2020-09-04 23:11:40,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-04 23:11:40,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:40,118 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:40,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 23:11:40,118 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:40,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:40,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1953752853, now seen corresponding path program 16 times [2020-09-04 23:11:40,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:40,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544261851] [2020-09-04 23:11:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:40,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:40,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544261851] [2020-09-04 23:11:40,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:40,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 23:11:40,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097545104] [2020-09-04 23:11:40,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 23:11:40,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:40,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 23:11:40,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 23:11:40,964 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 38 states. [2020-09-04 23:11:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:42,478 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2020-09-04 23:11:42,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-04 23:11:42,479 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 152 [2020-09-04 23:11:42,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:42,481 INFO L225 Difference]: With dead ends: 192 [2020-09-04 23:11:42,481 INFO L226 Difference]: Without dead ends: 167 [2020-09-04 23:11:42,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 23:11:42,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-04 23:11:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 162. [2020-09-04 23:11:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-04 23:11:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2020-09-04 23:11:42,490 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 152 [2020-09-04 23:11:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:42,490 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2020-09-04 23:11:42,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 23:11:42,490 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2020-09-04 23:11:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-04 23:11:42,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:42,492 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:42,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 23:11:42,493 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:42,493 INFO L82 PathProgramCache]: Analyzing trace with hash -411459356, now seen corresponding path program 17 times [2020-09-04 23:11:42,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:42,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420505391] [2020-09-04 23:11:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:43,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:43,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420505391] [2020-09-04 23:11:43,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:43,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 23:11:43,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564415216] [2020-09-04 23:11:43,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 23:11:43,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:43,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 23:11:43,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 23:11:43,388 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand 40 states. [2020-09-04 23:11:44,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:44,991 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2020-09-04 23:11:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-09-04 23:11:44,995 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 159 [2020-09-04 23:11:44,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:44,997 INFO L225 Difference]: With dead ends: 199 [2020-09-04 23:11:44,997 INFO L226 Difference]: Without dead ends: 174 [2020-09-04 23:11:45,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-09-04 23:11:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-04 23:11:45,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2020-09-04 23:11:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-04 23:11:45,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2020-09-04 23:11:45,014 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 159 [2020-09-04 23:11:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:45,014 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2020-09-04 23:11:45,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 23:11:45,014 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2020-09-04 23:11:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-04 23:11:45,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:45,019 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:45,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 23:11:45,019 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:45,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1386934219, now seen corresponding path program 18 times [2020-09-04 23:11:45,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:45,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006707991] [2020-09-04 23:11:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:46,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:46,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006707991] [2020-09-04 23:11:46,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:46,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-04 23:11:46,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314846313] [2020-09-04 23:11:46,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 23:11:46,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:46,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 23:11:46,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 23:11:46,079 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 42 states. [2020-09-04 23:11:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:47,726 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2020-09-04 23:11:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-04 23:11:47,726 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 166 [2020-09-04 23:11:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:47,729 INFO L225 Difference]: With dead ends: 206 [2020-09-04 23:11:47,729 INFO L226 Difference]: Without dead ends: 181 [2020-09-04 23:11:47,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-09-04 23:11:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-04 23:11:47,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 176. [2020-09-04 23:11:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-04 23:11:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2020-09-04 23:11:47,738 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 166 [2020-09-04 23:11:47,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:47,738 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2020-09-04 23:11:47,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 23:11:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2020-09-04 23:11:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-04 23:11:47,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:47,742 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:47,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 23:11:47,742 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:47,743 INFO L82 PathProgramCache]: Analyzing trace with hash 734917572, now seen corresponding path program 19 times [2020-09-04 23:11:47,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:47,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438259142] [2020-09-04 23:11:47,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:48,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 1350 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:48,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438259142] [2020-09-04 23:11:48,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:48,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 23:11:48,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938974575] [2020-09-04 23:11:48,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 23:11:48,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:48,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 23:11:48,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 23:11:48,817 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 44 states. [2020-09-04 23:11:50,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:50,719 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2020-09-04 23:11:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-09-04 23:11:50,719 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 173 [2020-09-04 23:11:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:50,721 INFO L225 Difference]: With dead ends: 213 [2020-09-04 23:11:50,721 INFO L226 Difference]: Without dead ends: 188 [2020-09-04 23:11:50,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-09-04 23:11:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-09-04 23:11:50,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 183. [2020-09-04 23:11:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-09-04 23:11:50,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2020-09-04 23:11:50,730 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 173 [2020-09-04 23:11:50,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:50,731 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2020-09-04 23:11:50,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 23:11:50,731 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2020-09-04 23:11:50,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-04 23:11:50,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:50,733 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:50,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 23:11:50,733 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:50,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:50,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1477983915, now seen corresponding path program 20 times [2020-09-04 23:11:50,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:50,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565818750] [2020-09-04 23:11:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:51,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1491 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:51,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565818750] [2020-09-04 23:11:51,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:51,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-04 23:11:51,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281759703] [2020-09-04 23:11:51,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-04 23:11:51,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:51,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-04 23:11:51,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 23:11:51,891 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 46 states. [2020-09-04 23:11:53,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:53,814 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2020-09-04 23:11:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-09-04 23:11:53,815 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 180 [2020-09-04 23:11:53,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:53,817 INFO L225 Difference]: With dead ends: 220 [2020-09-04 23:11:53,817 INFO L226 Difference]: Without dead ends: 195 [2020-09-04 23:11:53,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-09-04 23:11:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-04 23:11:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 190. [2020-09-04 23:11:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-09-04 23:11:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2020-09-04 23:11:53,831 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 180 [2020-09-04 23:11:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:53,832 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2020-09-04 23:11:53,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-04 23:11:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2020-09-04 23:11:53,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-09-04 23:11:53,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:53,834 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:53,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 23:11:53,834 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:53,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:53,835 INFO L82 PathProgramCache]: Analyzing trace with hash 891797156, now seen corresponding path program 21 times [2020-09-04 23:11:53,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:53,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802519346] [2020-09-04 23:11:53,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:55,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1639 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:55,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802519346] [2020-09-04 23:11:55,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:55,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-09-04 23:11:55,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314270204] [2020-09-04 23:11:55,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-04 23:11:55,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:55,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-04 23:11:55,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 23:11:55,151 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 48 states. [2020-09-04 23:11:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:57,155 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2020-09-04 23:11:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-09-04 23:11:57,156 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 187 [2020-09-04 23:11:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:57,159 INFO L225 Difference]: With dead ends: 227 [2020-09-04 23:11:57,159 INFO L226 Difference]: Without dead ends: 202 [2020-09-04 23:11:57,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-09-04 23:11:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-04 23:11:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2020-09-04 23:11:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-09-04 23:11:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2020-09-04 23:11:57,167 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 187 [2020-09-04 23:11:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:57,167 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2020-09-04 23:11:57,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-04 23:11:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2020-09-04 23:11:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-09-04 23:11:57,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:57,169 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:57,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 23:11:57,169 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:57,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:57,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1428293003, now seen corresponding path program 22 times [2020-09-04 23:11:57,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:57,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863703314] [2020-09-04 23:11:57,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:58,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 1794 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:11:58,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863703314] [2020-09-04 23:11:58,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:58,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-09-04 23:11:58,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87091054] [2020-09-04 23:11:58,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-04 23:11:58,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:58,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-04 23:11:58,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 23:11:58,581 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand 50 states. [2020-09-04 23:12:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:00,945 INFO L93 Difference]: Finished difference Result 234 states and 238 transitions. [2020-09-04 23:12:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-09-04 23:12:00,945 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2020-09-04 23:12:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:00,947 INFO L225 Difference]: With dead ends: 234 [2020-09-04 23:12:00,947 INFO L226 Difference]: Without dead ends: 209 [2020-09-04 23:12:00,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-09-04 23:12:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-04 23:12:00,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 204. [2020-09-04 23:12:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-04 23:12:00,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2020-09-04 23:12:00,956 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 194 [2020-09-04 23:12:00,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:00,956 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2020-09-04 23:12:00,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-04 23:12:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2020-09-04 23:12:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-04 23:12:00,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:00,958 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:00,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-04 23:12:00,958 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:00,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:00,959 INFO L82 PathProgramCache]: Analyzing trace with hash 815071620, now seen corresponding path program 23 times [2020-09-04 23:12:00,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:00,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929210286] [2020-09-04 23:12:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:02,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1967 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:12:02,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929210286] [2020-09-04 23:12:02,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:02,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-09-04 23:12:02,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894772039] [2020-09-04 23:12:02,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-04 23:12:02,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:02,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-04 23:12:02,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 23:12:02,467 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand 52 states. [2020-09-04 23:12:05,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:05,108 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2020-09-04 23:12:05,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-09-04 23:12:05,109 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 201 [2020-09-04 23:12:05,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:05,110 INFO L225 Difference]: With dead ends: 241 [2020-09-04 23:12:05,111 INFO L226 Difference]: Without dead ends: 216 [2020-09-04 23:12:05,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-09-04 23:12:05,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-04 23:12:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 211. [2020-09-04 23:12:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-09-04 23:12:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2020-09-04 23:12:05,119 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 201 [2020-09-04 23:12:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:05,119 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2020-09-04 23:12:05,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-04 23:12:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2020-09-04 23:12:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-09-04 23:12:05,120 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:05,121 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:05,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-04 23:12:05,121 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:05,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1567210389, now seen corresponding path program 24 times [2020-09-04 23:12:05,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:05,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062552575] [2020-09-04 23:12:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:06,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 0 proven. 2125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:12:06,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062552575] [2020-09-04 23:12:06,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:06,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-09-04 23:12:06,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972222763] [2020-09-04 23:12:06,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-09-04 23:12:06,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:06,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-09-04 23:12:06,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 23:12:06,730 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 54 states. [2020-09-04 23:12:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:09,293 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2020-09-04 23:12:09,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-09-04 23:12:09,294 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 208 [2020-09-04 23:12:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:09,295 INFO L225 Difference]: With dead ends: 248 [2020-09-04 23:12:09,295 INFO L226 Difference]: Without dead ends: 223 [2020-09-04 23:12:09,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-09-04 23:12:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-04 23:12:09,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 218. [2020-09-04 23:12:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-09-04 23:12:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 220 transitions. [2020-09-04 23:12:09,303 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 220 transitions. Word has length 208 [2020-09-04 23:12:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:09,304 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 220 transitions. [2020-09-04 23:12:09,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-09-04 23:12:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 220 transitions. [2020-09-04 23:12:09,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-09-04 23:12:09,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:09,306 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:09,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-04 23:12:09,306 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:09,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:09,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1520680036, now seen corresponding path program 25 times [2020-09-04 23:12:09,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:09,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505187220] [2020-09-04 23:12:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:10,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:12:11,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505187220] [2020-09-04 23:12:11,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:11,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-09-04 23:12:11,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635469481] [2020-09-04 23:12:11,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-09-04 23:12:11,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:11,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-09-04 23:12:11,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 23:12:11,025 INFO L87 Difference]: Start difference. First operand 218 states and 220 transitions. Second operand 56 states. [2020-09-04 23:12:14,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:14,054 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2020-09-04 23:12:14,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-09-04 23:12:14,054 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 215 [2020-09-04 23:12:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:14,057 INFO L225 Difference]: With dead ends: 255 [2020-09-04 23:12:14,057 INFO L226 Difference]: Without dead ends: 230 [2020-09-04 23:12:14,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-09-04 23:12:14,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-04 23:12:14,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 225. [2020-09-04 23:12:14,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-09-04 23:12:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2020-09-04 23:12:14,065 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 215 [2020-09-04 23:12:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:14,066 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2020-09-04 23:12:14,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-09-04 23:12:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2020-09-04 23:12:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-09-04 23:12:14,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:14,068 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:14,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-04 23:12:14,068 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:14,068 INFO L82 PathProgramCache]: Analyzing trace with hash -415431499, now seen corresponding path program 26 times [2020-09-04 23:12:14,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:14,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487448546] [2020-09-04 23:12:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:15,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2495 backedges. 0 proven. 2484 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:12:15,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487448546] [2020-09-04 23:12:15,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:15,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-09-04 23:12:15,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538642732] [2020-09-04 23:12:15,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-09-04 23:12:15,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:15,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-09-04 23:12:15,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-09-04 23:12:15,952 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 58 states. [2020-09-04 23:12:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:19,190 INFO L93 Difference]: Finished difference Result 262 states and 266 transitions. [2020-09-04 23:12:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-09-04 23:12:19,191 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 222 [2020-09-04 23:12:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:19,193 INFO L225 Difference]: With dead ends: 262 [2020-09-04 23:12:19,193 INFO L226 Difference]: Without dead ends: 237 [2020-09-04 23:12:19,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-09-04 23:12:19,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-04 23:12:19,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 232. [2020-09-04 23:12:19,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-09-04 23:12:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2020-09-04 23:12:19,201 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 222 [2020-09-04 23:12:19,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:19,202 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2020-09-04 23:12:19,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-09-04 23:12:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2020-09-04 23:12:19,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-09-04 23:12:19,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:19,204 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:19,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-04 23:12:19,204 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:19,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:19,204 INFO L82 PathProgramCache]: Analyzing trace with hash -547229884, now seen corresponding path program 27 times [2020-09-04 23:12:19,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:19,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288203208] [2020-09-04 23:12:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:21,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2685 backedges. 0 proven. 2674 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:12:21,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288203208] [2020-09-04 23:12:21,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:21,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-09-04 23:12:21,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136781819] [2020-09-04 23:12:21,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-09-04 23:12:21,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:21,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-09-04 23:12:21,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 23:12:21,175 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand 60 states. [2020-09-04 23:12:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:24,612 INFO L93 Difference]: Finished difference Result 269 states and 273 transitions. [2020-09-04 23:12:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-09-04 23:12:24,613 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 229 [2020-09-04 23:12:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:24,615 INFO L225 Difference]: With dead ends: 269 [2020-09-04 23:12:24,615 INFO L226 Difference]: Without dead ends: 244 [2020-09-04 23:12:24,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-09-04 23:12:24,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-04 23:12:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 239. [2020-09-04 23:12:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-09-04 23:12:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2020-09-04 23:12:24,624 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 229 [2020-09-04 23:12:24,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:24,624 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2020-09-04 23:12:24,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-09-04 23:12:24,624 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2020-09-04 23:12:24,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-09-04 23:12:24,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:24,626 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:24,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-04 23:12:24,626 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:24,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:24,627 INFO L82 PathProgramCache]: Analyzing trace with hash 277468629, now seen corresponding path program 28 times [2020-09-04 23:12:24,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:24,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799401325] [2020-09-04 23:12:24,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:26,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2871 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:12:26,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799401325] [2020-09-04 23:12:26,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:26,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-09-04 23:12:26,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643001342] [2020-09-04 23:12:26,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-09-04 23:12:26,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-09-04 23:12:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-09-04 23:12:26,718 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand 62 states. [2020-09-04 23:12:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:30,437 INFO L93 Difference]: Finished difference Result 276 states and 280 transitions. [2020-09-04 23:12:30,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-09-04 23:12:30,438 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 236 [2020-09-04 23:12:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:30,441 INFO L225 Difference]: With dead ends: 276 [2020-09-04 23:12:30,441 INFO L226 Difference]: Without dead ends: 251 [2020-09-04 23:12:30,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-09-04 23:12:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-04 23:12:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 246. [2020-09-04 23:12:30,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-09-04 23:12:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 248 transitions. [2020-09-04 23:12:30,450 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 248 transitions. Word has length 236 [2020-09-04 23:12:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:30,451 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 248 transitions. [2020-09-04 23:12:30,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-09-04 23:12:30,451 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 248 transitions. [2020-09-04 23:12:30,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-09-04 23:12:30,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:30,452 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:30,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-04 23:12:30,453 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1168270812, now seen corresponding path program 29 times [2020-09-04 23:12:30,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:30,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812604084] [2020-09-04 23:12:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:32,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3086 backedges. 0 proven. 3075 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:12:32,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812604084] [2020-09-04 23:12:32,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:32,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-09-04 23:12:32,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964380800] [2020-09-04 23:12:32,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-09-04 23:12:32,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:32,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-09-04 23:12:32,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 23:12:32,758 INFO L87 Difference]: Start difference. First operand 246 states and 248 transitions. Second operand 64 states. [2020-09-04 23:12:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:36,695 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2020-09-04 23:12:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-09-04 23:12:36,698 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 243 [2020-09-04 23:12:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:36,700 INFO L225 Difference]: With dead ends: 283 [2020-09-04 23:12:36,700 INFO L226 Difference]: Without dead ends: 258 [2020-09-04 23:12:36,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-09-04 23:12:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-09-04 23:12:36,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 253. [2020-09-04 23:12:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-09-04 23:12:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2020-09-04 23:12:36,711 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 243 [2020-09-04 23:12:36,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:36,711 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2020-09-04 23:12:36,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-09-04 23:12:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2020-09-04 23:12:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-09-04 23:12:36,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:36,713 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:36,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-04 23:12:36,713 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:36,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:36,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1644310261, now seen corresponding path program 30 times [2020-09-04 23:12:36,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:36,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115787647] [2020-09-04 23:12:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:39,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3297 backedges. 0 proven. 3286 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:12:39,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115787647] [2020-09-04 23:12:39,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:39,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-09-04 23:12:39,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269173697] [2020-09-04 23:12:39,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-09-04 23:12:39,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:39,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-09-04 23:12:39,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-09-04 23:12:39,176 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand 66 states. [2020-09-04 23:12:43,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:43,224 INFO L93 Difference]: Finished difference Result 290 states and 294 transitions. [2020-09-04 23:12:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-09-04 23:12:43,225 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 250 [2020-09-04 23:12:43,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:43,227 INFO L225 Difference]: With dead ends: 290 [2020-09-04 23:12:43,227 INFO L226 Difference]: Without dead ends: 265 [2020-09-04 23:12:43,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-09-04 23:12:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-04 23:12:43,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 260. [2020-09-04 23:12:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-09-04 23:12:43,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 262 transitions. [2020-09-04 23:12:43,235 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 262 transitions. Word has length 250 [2020-09-04 23:12:43,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:43,235 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 262 transitions. [2020-09-04 23:12:43,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-09-04 23:12:43,236 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 262 transitions. [2020-09-04 23:12:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-09-04 23:12:43,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:43,237 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:43,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-04 23:12:43,238 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:43,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:43,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1767588604, now seen corresponding path program 31 times [2020-09-04 23:12:43,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:43,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672864450] [2020-09-04 23:12:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:45,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 0 proven. 3504 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:12:45,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672864450] [2020-09-04 23:12:45,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:45,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-09-04 23:12:45,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21755779] [2020-09-04 23:12:45,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-09-04 23:12:45,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:45,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-09-04 23:12:45,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 23:12:45,885 INFO L87 Difference]: Start difference. First operand 260 states and 262 transitions. Second operand 68 states. [2020-09-04 23:12:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:50,322 INFO L93 Difference]: Finished difference Result 297 states and 301 transitions. [2020-09-04 23:12:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-09-04 23:12:50,323 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 257 [2020-09-04 23:12:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:50,325 INFO L225 Difference]: With dead ends: 297 [2020-09-04 23:12:50,325 INFO L226 Difference]: Without dead ends: 272 [2020-09-04 23:12:50,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-09-04 23:12:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-04 23:12:50,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 267. [2020-09-04 23:12:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-09-04 23:12:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2020-09-04 23:12:50,333 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 257 [2020-09-04 23:12:50,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:50,333 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2020-09-04 23:12:50,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-09-04 23:12:50,333 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2020-09-04 23:12:50,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-09-04 23:12:50,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:50,335 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:50,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-04 23:12:50,335 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:50,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1155010581, now seen corresponding path program 32 times [2020-09-04 23:12:50,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:50,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436815945] [2020-09-04 23:12:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:53,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3740 backedges. 0 proven. 3729 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:12:53,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436815945] [2020-09-04 23:12:53,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:53,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-09-04 23:12:53,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366335436] [2020-09-04 23:12:53,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-09-04 23:12:53,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:53,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-09-04 23:12:53,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-09-04 23:12:53,081 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand 70 states. [2020-09-04 23:12:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:57,849 INFO L93 Difference]: Finished difference Result 304 states and 308 transitions. [2020-09-04 23:12:57,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-09-04 23:12:57,850 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 264 [2020-09-04 23:12:57,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:57,853 INFO L225 Difference]: With dead ends: 304 [2020-09-04 23:12:57,853 INFO L226 Difference]: Without dead ends: 279 [2020-09-04 23:12:57,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-09-04 23:12:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-09-04 23:12:57,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 274. [2020-09-04 23:12:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-09-04 23:12:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 276 transitions. [2020-09-04 23:12:57,861 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 276 transitions. Word has length 264 [2020-09-04 23:12:57,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:57,861 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 276 transitions. [2020-09-04 23:12:57,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-09-04 23:12:57,862 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 276 transitions. [2020-09-04 23:12:57,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-09-04 23:12:57,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:57,863 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:57,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-04 23:12:57,864 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:57,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:57,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1362798620, now seen corresponding path program 33 times [2020-09-04 23:12:57,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:57,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135111142] [2020-09-04 23:12:57,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:00,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 0 proven. 3961 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:13:00,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135111142] [2020-09-04 23:13:00,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:00,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-09-04 23:13:00,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994100066] [2020-09-04 23:13:00,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-09-04 23:13:00,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:00,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-09-04 23:13:00,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 23:13:00,894 INFO L87 Difference]: Start difference. First operand 274 states and 276 transitions. Second operand 72 states. [2020-09-04 23:13:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:05,935 INFO L93 Difference]: Finished difference Result 311 states and 315 transitions. [2020-09-04 23:13:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-09-04 23:13:05,936 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 271 [2020-09-04 23:13:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:05,938 INFO L225 Difference]: With dead ends: 311 [2020-09-04 23:13:05,938 INFO L226 Difference]: Without dead ends: 286 [2020-09-04 23:13:05,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-09-04 23:13:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-04 23:13:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 281. [2020-09-04 23:13:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-09-04 23:13:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 283 transitions. [2020-09-04 23:13:05,946 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 283 transitions. Word has length 271 [2020-09-04 23:13:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:05,946 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 283 transitions. [2020-09-04 23:13:05,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-09-04 23:13:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 283 transitions. [2020-09-04 23:13:05,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-09-04 23:13:05,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:05,948 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:05,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-04 23:13:05,949 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:05,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:05,949 INFO L82 PathProgramCache]: Analyzing trace with hash 582842677, now seen corresponding path program 34 times [2020-09-04 23:13:05,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:05,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739792972] [2020-09-04 23:13:05,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:08,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4211 backedges. 0 proven. 4200 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:13:09,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739792972] [2020-09-04 23:13:09,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:09,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-09-04 23:13:09,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677171680] [2020-09-04 23:13:09,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-09-04 23:13:09,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:09,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-09-04 23:13:09,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-09-04 23:13:09,050 INFO L87 Difference]: Start difference. First operand 281 states and 283 transitions. Second operand 74 states. [2020-09-04 23:13:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:14,309 INFO L93 Difference]: Finished difference Result 318 states and 322 transitions. [2020-09-04 23:13:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-09-04 23:13:14,310 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 278 [2020-09-04 23:13:14,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:14,312 INFO L225 Difference]: With dead ends: 318 [2020-09-04 23:13:14,312 INFO L226 Difference]: Without dead ends: 293 [2020-09-04 23:13:14,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-09-04 23:13:14,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-09-04 23:13:14,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 288. [2020-09-04 23:13:14,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-09-04 23:13:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 290 transitions. [2020-09-04 23:13:14,319 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 290 transitions. Word has length 278 [2020-09-04 23:13:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:14,319 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 290 transitions. [2020-09-04 23:13:14,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-09-04 23:13:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 290 transitions. [2020-09-04 23:13:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-09-04 23:13:14,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:14,321 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:14,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-04 23:13:14,321 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:14,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:14,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1395823932, now seen corresponding path program 35 times [2020-09-04 23:13:14,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:14,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977808694] [2020-09-04 23:13:14,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:17,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4457 backedges. 0 proven. 4446 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:13:17,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977808694] [2020-09-04 23:13:17,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:17,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-09-04 23:13:17,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85798577] [2020-09-04 23:13:17,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-09-04 23:13:17,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:17,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-09-04 23:13:17,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-09-04 23:13:17,755 INFO L87 Difference]: Start difference. First operand 288 states and 290 transitions. Second operand 76 states. [2020-09-04 23:13:23,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:23,456 INFO L93 Difference]: Finished difference Result 325 states and 329 transitions. [2020-09-04 23:13:23,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-09-04 23:13:23,457 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 285 [2020-09-04 23:13:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:23,459 INFO L225 Difference]: With dead ends: 325 [2020-09-04 23:13:23,459 INFO L226 Difference]: Without dead ends: 300 [2020-09-04 23:13:23,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-09-04 23:13:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-09-04 23:13:23,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 295. [2020-09-04 23:13:23,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-09-04 23:13:23,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 297 transitions. [2020-09-04 23:13:23,467 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 297 transitions. Word has length 285 [2020-09-04 23:13:23,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:23,468 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 297 transitions. [2020-09-04 23:13:23,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-09-04 23:13:23,468 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 297 transitions. [2020-09-04 23:13:23,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-09-04 23:13:23,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:23,470 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:23,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-04 23:13:23,470 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2048628139, now seen corresponding path program 36 times [2020-09-04 23:13:23,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:23,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849897266] [2020-09-04 23:13:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:27,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4699 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:13:27,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849897266] [2020-09-04 23:13:27,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:27,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-09-04 23:13:27,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041420740] [2020-09-04 23:13:27,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-09-04 23:13:27,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:27,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-09-04 23:13:27,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-09-04 23:13:27,054 INFO L87 Difference]: Start difference. First operand 295 states and 297 transitions. Second operand 78 states. [2020-09-04 23:13:32,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:32,624 INFO L93 Difference]: Finished difference Result 332 states and 336 transitions. [2020-09-04 23:13:32,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-09-04 23:13:32,625 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 292 [2020-09-04 23:13:32,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:32,628 INFO L225 Difference]: With dead ends: 332 [2020-09-04 23:13:32,628 INFO L226 Difference]: Without dead ends: 307 [2020-09-04 23:13:32,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-09-04 23:13:32,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-09-04 23:13:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 302. [2020-09-04 23:13:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-09-04 23:13:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 304 transitions. [2020-09-04 23:13:32,636 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 304 transitions. Word has length 292 [2020-09-04 23:13:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:32,636 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 304 transitions. [2020-09-04 23:13:32,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-09-04 23:13:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 304 transitions. [2020-09-04 23:13:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-09-04 23:13:32,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:32,638 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:32,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-04 23:13:32,638 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:32,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:32,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1974798940, now seen corresponding path program 37 times [2020-09-04 23:13:32,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:32,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140161315] [2020-09-04 23:13:32,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:36,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:13:36,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140161315] [2020-09-04 23:13:36,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:36,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-09-04 23:13:36,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868245869] [2020-09-04 23:13:36,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-09-04 23:13:36,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:36,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-09-04 23:13:36,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-09-04 23:13:36,507 INFO L87 Difference]: Start difference. First operand 302 states and 304 transitions. Second operand 80 states. [2020-09-04 23:13:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:42,916 INFO L93 Difference]: Finished difference Result 339 states and 343 transitions. [2020-09-04 23:13:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-09-04 23:13:42,917 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 299 [2020-09-04 23:13:42,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:42,920 INFO L225 Difference]: With dead ends: 339 [2020-09-04 23:13:42,921 INFO L226 Difference]: Without dead ends: 314 [2020-09-04 23:13:42,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-09-04 23:13:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-09-04 23:13:42,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 309. [2020-09-04 23:13:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-09-04 23:13:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 311 transitions. [2020-09-04 23:13:42,929 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 311 transitions. Word has length 299 [2020-09-04 23:13:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:42,930 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 311 transitions. [2020-09-04 23:13:42,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-09-04 23:13:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 311 transitions. [2020-09-04 23:13:42,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-09-04 23:13:42,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:42,932 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:42,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-04 23:13:42,932 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:42,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:42,932 INFO L82 PathProgramCache]: Analyzing trace with hash 956228469, now seen corresponding path program 38 times [2020-09-04 23:13:42,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:42,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751529151] [2020-09-04 23:13:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:46,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5237 backedges. 0 proven. 5226 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:13:47,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751529151] [2020-09-04 23:13:47,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:47,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-09-04 23:13:47,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701976406] [2020-09-04 23:13:47,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-09-04 23:13:47,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:47,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-09-04 23:13:47,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-09-04 23:13:47,019 INFO L87 Difference]: Start difference. First operand 309 states and 311 transitions. Second operand 82 states. [2020-09-04 23:13:53,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:53,795 INFO L93 Difference]: Finished difference Result 346 states and 350 transitions. [2020-09-04 23:13:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-09-04 23:13:53,796 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 306 [2020-09-04 23:13:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:53,798 INFO L225 Difference]: With dead ends: 346 [2020-09-04 23:13:53,798 INFO L226 Difference]: Without dead ends: 321 [2020-09-04 23:13:53,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-09-04 23:13:53,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-09-04 23:13:53,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 316. [2020-09-04 23:13:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-09-04 23:13:53,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 318 transitions. [2020-09-04 23:13:53,808 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 318 transitions. Word has length 306 [2020-09-04 23:13:53,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:53,810 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 318 transitions. [2020-09-04 23:13:53,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-09-04 23:13:53,810 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 318 transitions. [2020-09-04 23:13:53,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-09-04 23:13:53,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:53,812 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:53,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-04 23:13:53,812 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:53,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1884027012, now seen corresponding path program 39 times [2020-09-04 23:13:53,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:53,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038960050] [2020-09-04 23:13:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:58,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5511 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:13:58,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038960050] [2020-09-04 23:13:58,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:58,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-09-04 23:13:58,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066574672] [2020-09-04 23:13:58,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-09-04 23:13:58,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:58,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-09-04 23:13:58,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-09-04 23:13:58,177 INFO L87 Difference]: Start difference. First operand 316 states and 318 transitions. Second operand 84 states. [2020-09-04 23:14:04,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:04,747 INFO L93 Difference]: Finished difference Result 353 states and 357 transitions. [2020-09-04 23:14:04,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-09-04 23:14:04,748 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 313 [2020-09-04 23:14:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:04,750 INFO L225 Difference]: With dead ends: 353 [2020-09-04 23:14:04,750 INFO L226 Difference]: Without dead ends: 328 [2020-09-04 23:14:04,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-09-04 23:14:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-09-04 23:14:04,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 323. [2020-09-04 23:14:04,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-09-04 23:14:04,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 325 transitions. [2020-09-04 23:14:04,758 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 325 transitions. Word has length 313 [2020-09-04 23:14:04,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:04,759 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 325 transitions. [2020-09-04 23:14:04,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-09-04 23:14:04,759 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 325 transitions. [2020-09-04 23:14:04,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-09-04 23:14:04,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:04,761 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:04,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-04 23:14:04,761 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:04,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:04,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1732174997, now seen corresponding path program 40 times [2020-09-04 23:14:04,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:04,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839279410] [2020-09-04 23:14:04,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:09,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5792 backedges. 0 proven. 5781 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:14:09,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839279410] [2020-09-04 23:14:09,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:09,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-09-04 23:14:09,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984478248] [2020-09-04 23:14:09,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-09-04 23:14:09,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:09,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-09-04 23:14:09,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-09-04 23:14:09,313 INFO L87 Difference]: Start difference. First operand 323 states and 325 transitions. Second operand 86 states. [2020-09-04 23:14:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:16,798 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2020-09-04 23:14:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-09-04 23:14:16,800 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 320 [2020-09-04 23:14:16,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:16,802 INFO L225 Difference]: With dead ends: 360 [2020-09-04 23:14:16,802 INFO L226 Difference]: Without dead ends: 335 [2020-09-04 23:14:16,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-09-04 23:14:16,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-09-04 23:14:16,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 330. [2020-09-04 23:14:16,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-09-04 23:14:16,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 332 transitions. [2020-09-04 23:14:16,811 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 332 transitions. Word has length 320 [2020-09-04 23:14:16,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:16,812 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 332 transitions. [2020-09-04 23:14:16,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-09-04 23:14:16,812 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 332 transitions. [2020-09-04 23:14:16,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-04 23:14:16,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:16,814 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:16,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-04 23:14:16,814 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:16,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:16,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1755417756, now seen corresponding path program 41 times [2020-09-04 23:14:16,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:16,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303264074] [2020-09-04 23:14:16,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6080 backedges. 0 proven. 6069 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:14:21,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303264074] [2020-09-04 23:14:21,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:21,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-09-04 23:14:21,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670374123] [2020-09-04 23:14:21,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-09-04 23:14:21,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:21,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-09-04 23:14:21,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-09-04 23:14:21,693 INFO L87 Difference]: Start difference. First operand 330 states and 332 transitions. Second operand 88 states. [2020-09-04 23:14:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:29,371 INFO L93 Difference]: Finished difference Result 367 states and 371 transitions. [2020-09-04 23:14:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-09-04 23:14:29,372 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 327 [2020-09-04 23:14:29,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:29,375 INFO L225 Difference]: With dead ends: 367 [2020-09-04 23:14:29,375 INFO L226 Difference]: Without dead ends: 342 [2020-09-04 23:14:29,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-09-04 23:14:29,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-09-04 23:14:29,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 337. [2020-09-04 23:14:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-09-04 23:14:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 339 transitions. [2020-09-04 23:14:29,388 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 339 transitions. Word has length 327 [2020-09-04 23:14:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:29,389 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 339 transitions. [2020-09-04 23:14:29,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-09-04 23:14:29,390 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 339 transitions. [2020-09-04 23:14:29,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-04 23:14:29,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:29,392 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:29,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-04 23:14:29,392 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:29,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:29,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1135186507, now seen corresponding path program 42 times [2020-09-04 23:14:29,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:29,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922761868] [2020-09-04 23:14:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:34,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 0 proven. 6364 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:14:34,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922761868] [2020-09-04 23:14:34,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:34,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-09-04 23:14:34,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108180269] [2020-09-04 23:14:34,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-09-04 23:14:34,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:34,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-09-04 23:14:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-09-04 23:14:34,630 INFO L87 Difference]: Start difference. First operand 337 states and 339 transitions. Second operand 90 states. [2020-09-04 23:14:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:43,189 INFO L93 Difference]: Finished difference Result 374 states and 378 transitions. [2020-09-04 23:14:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-09-04 23:14:43,190 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 334 [2020-09-04 23:14:43,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:43,193 INFO L225 Difference]: With dead ends: 374 [2020-09-04 23:14:43,193 INFO L226 Difference]: Without dead ends: 349 [2020-09-04 23:14:43,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-09-04 23:14:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-04 23:14:43,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 344. [2020-09-04 23:14:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-09-04 23:14:43,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 346 transitions. [2020-09-04 23:14:43,202 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 346 transitions. Word has length 334 [2020-09-04 23:14:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:43,202 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 346 transitions. [2020-09-04 23:14:43,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-09-04 23:14:43,202 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 346 transitions. [2020-09-04 23:14:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-09-04 23:14:43,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:43,204 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:43,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-04 23:14:43,205 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:43,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:43,205 INFO L82 PathProgramCache]: Analyzing trace with hash 663774788, now seen corresponding path program 43 times [2020-09-04 23:14:43,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:43,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971873086] [2020-09-04 23:14:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:48,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6677 backedges. 0 proven. 6666 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:14:48,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971873086] [2020-09-04 23:14:48,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:48,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-09-04 23:14:48,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826616848] [2020-09-04 23:14:48,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-09-04 23:14:48,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:48,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-09-04 23:14:48,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-09-04 23:14:48,995 INFO L87 Difference]: Start difference. First operand 344 states and 346 transitions. Second operand 92 states. [2020-09-04 23:14:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:58,385 INFO L93 Difference]: Finished difference Result 381 states and 385 transitions. [2020-09-04 23:14:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-09-04 23:14:58,391 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 341 [2020-09-04 23:14:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:58,392 INFO L225 Difference]: With dead ends: 381 [2020-09-04 23:14:58,393 INFO L226 Difference]: Without dead ends: 356 [2020-09-04 23:14:58,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-09-04 23:14:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-09-04 23:14:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 351. [2020-09-04 23:14:58,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-09-04 23:14:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 353 transitions. [2020-09-04 23:14:58,409 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 353 transitions. Word has length 341 [2020-09-04 23:14:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:58,410 INFO L479 AbstractCegarLoop]: Abstraction has 351 states and 353 transitions. [2020-09-04 23:14:58,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-09-04 23:14:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 353 transitions. [2020-09-04 23:14:58,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-09-04 23:14:58,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:58,412 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:58,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-04 23:14:58,413 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:58,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:58,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2072543531, now seen corresponding path program 44 times [2020-09-04 23:14:58,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:58,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578819150] [2020-09-04 23:14:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:04,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6986 backedges. 0 proven. 6975 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:15:04,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578819150] [2020-09-04 23:15:04,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:04,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-09-04 23:15:04,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880326911] [2020-09-04 23:15:04,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-09-04 23:15:04,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:04,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-09-04 23:15:04,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-09-04 23:15:04,577 INFO L87 Difference]: Start difference. First operand 351 states and 353 transitions. Second operand 94 states. [2020-09-04 23:15:14,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:14,151 INFO L93 Difference]: Finished difference Result 388 states and 392 transitions. [2020-09-04 23:15:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-09-04 23:15:14,152 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 348 [2020-09-04 23:15:14,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:14,154 INFO L225 Difference]: With dead ends: 388 [2020-09-04 23:15:14,155 INFO L226 Difference]: Without dead ends: 363 [2020-09-04 23:15:14,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-09-04 23:15:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-09-04 23:15:14,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 358. [2020-09-04 23:15:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-09-04 23:15:14,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 360 transitions. [2020-09-04 23:15:14,162 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 360 transitions. Word has length 348 [2020-09-04 23:15:14,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:14,162 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 360 transitions. [2020-09-04 23:15:14,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-09-04 23:15:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 360 transitions. [2020-09-04 23:15:14,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-09-04 23:15:14,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:14,165 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:14,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-04 23:15:14,165 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:14,166 INFO L82 PathProgramCache]: Analyzing trace with hash 409981220, now seen corresponding path program 45 times [2020-09-04 23:15:14,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:14,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533404218] [2020-09-04 23:15:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7302 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:15:20,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533404218] [2020-09-04 23:15:20,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:20,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-09-04 23:15:20,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842448422] [2020-09-04 23:15:20,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-09-04 23:15:20,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:20,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-09-04 23:15:20,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-09-04 23:15:20,595 INFO L87 Difference]: Start difference. First operand 358 states and 360 transitions. Second operand 96 states. [2020-09-04 23:15:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:30,554 INFO L93 Difference]: Finished difference Result 395 states and 399 transitions. [2020-09-04 23:15:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-09-04 23:15:30,556 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 355 [2020-09-04 23:15:30,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:30,557 INFO L225 Difference]: With dead ends: 395 [2020-09-04 23:15:30,557 INFO L226 Difference]: Without dead ends: 370 [2020-09-04 23:15:30,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-09-04 23:15:30,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-09-04 23:15:30,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 365. [2020-09-04 23:15:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-09-04 23:15:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 367 transitions. [2020-09-04 23:15:30,566 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 367 transitions. Word has length 355 [2020-09-04 23:15:30,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:30,567 INFO L479 AbstractCegarLoop]: Abstraction has 365 states and 367 transitions. [2020-09-04 23:15:30,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-09-04 23:15:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 367 transitions. [2020-09-04 23:15:30,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-09-04 23:15:30,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:30,570 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:30,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-04 23:15:30,570 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:30,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:30,570 INFO L82 PathProgramCache]: Analyzing trace with hash -866904075, now seen corresponding path program 46 times [2020-09-04 23:15:30,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:30,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273717289] [2020-09-04 23:15:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:37,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7625 backedges. 0 proven. 7614 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:15:37,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273717289] [2020-09-04 23:15:37,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:37,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2020-09-04 23:15:37,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912036310] [2020-09-04 23:15:37,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-09-04 23:15:37,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:37,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-09-04 23:15:37,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-09-04 23:15:37,492 INFO L87 Difference]: Start difference. First operand 365 states and 367 transitions. Second operand 98 states. [2020-09-04 23:15:48,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:48,475 INFO L93 Difference]: Finished difference Result 402 states and 406 transitions. [2020-09-04 23:15:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-09-04 23:15:48,477 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 362 [2020-09-04 23:15:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:48,479 INFO L225 Difference]: With dead ends: 402 [2020-09-04 23:15:48,479 INFO L226 Difference]: Without dead ends: 377 [2020-09-04 23:15:48,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-09-04 23:15:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-09-04 23:15:48,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 372. [2020-09-04 23:15:48,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-09-04 23:15:48,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 374 transitions. [2020-09-04 23:15:48,486 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 374 transitions. Word has length 362 [2020-09-04 23:15:48,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:48,487 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 374 transitions. [2020-09-04 23:15:48,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-09-04 23:15:48,487 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 374 transitions. [2020-09-04 23:15:48,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-09-04 23:15:48,489 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:48,490 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:48,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-09-04 23:15:48,490 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:48,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:48,490 INFO L82 PathProgramCache]: Analyzing trace with hash 285914116, now seen corresponding path program 47 times [2020-09-04 23:15:48,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:48,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583173333] [2020-09-04 23:15:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:55,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7955 backedges. 0 proven. 7944 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:15:55,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583173333] [2020-09-04 23:15:55,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:55,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-09-04 23:15:55,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495025389] [2020-09-04 23:15:55,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-09-04 23:15:55,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:55,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-09-04 23:15:55,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-09-04 23:15:55,940 INFO L87 Difference]: Start difference. First operand 372 states and 374 transitions. Second operand 100 states. [2020-09-04 23:16:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:07,639 INFO L93 Difference]: Finished difference Result 409 states and 413 transitions. [2020-09-04 23:16:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-09-04 23:16:07,641 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 369 [2020-09-04 23:16:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:07,643 INFO L225 Difference]: With dead ends: 409 [2020-09-04 23:16:07,643 INFO L226 Difference]: Without dead ends: 384 [2020-09-04 23:16:07,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-09-04 23:16:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-09-04 23:16:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 379. [2020-09-04 23:16:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-09-04 23:16:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 381 transitions. [2020-09-04 23:16:07,652 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 381 transitions. Word has length 369 [2020-09-04 23:16:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:07,652 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 381 transitions. [2020-09-04 23:16:07,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-09-04 23:16:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 381 transitions. [2020-09-04 23:16:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-09-04 23:16:07,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:07,656 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:07,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-09-04 23:16:07,656 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:07,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:07,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2128725739, now seen corresponding path program 48 times [2020-09-04 23:16:07,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:07,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147545091] [2020-09-04 23:16:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:15,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8292 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:16:15,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147545091] [2020-09-04 23:16:15,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:15,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2020-09-04 23:16:15,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346567439] [2020-09-04 23:16:15,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-09-04 23:16:15,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:15,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-09-04 23:16:15,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-09-04 23:16:15,208 INFO L87 Difference]: Start difference. First operand 379 states and 381 transitions. Second operand 102 states. [2020-09-04 23:16:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:27,018 INFO L93 Difference]: Finished difference Result 416 states and 420 transitions. [2020-09-04 23:16:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-09-04 23:16:27,020 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 376 [2020-09-04 23:16:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:27,022 INFO L225 Difference]: With dead ends: 416 [2020-09-04 23:16:27,022 INFO L226 Difference]: Without dead ends: 391 [2020-09-04 23:16:27,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-09-04 23:16:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-09-04 23:16:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 386. [2020-09-04 23:16:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-09-04 23:16:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 388 transitions. [2020-09-04 23:16:27,032 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 388 transitions. Word has length 376 [2020-09-04 23:16:27,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:27,032 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 388 transitions. [2020-09-04 23:16:27,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-09-04 23:16:27,033 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 388 transitions. [2020-09-04 23:16:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-09-04 23:16:27,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:27,050 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:27,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-09-04 23:16:27,050 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:27,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:27,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1206849252, now seen corresponding path program 49 times [2020-09-04 23:16:27,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:27,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628412647] [2020-09-04 23:16:27,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:34,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8636 backedges. 0 proven. 8625 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:16:35,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628412647] [2020-09-04 23:16:35,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:35,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2020-09-04 23:16:35,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177203976] [2020-09-04 23:16:35,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-09-04 23:16:35,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:35,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-09-04 23:16:35,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-09-04 23:16:35,071 INFO L87 Difference]: Start difference. First operand 386 states and 388 transitions. Second operand 104 states. [2020-09-04 23:16:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:48,428 INFO L93 Difference]: Finished difference Result 423 states and 427 transitions. [2020-09-04 23:16:48,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-09-04 23:16:48,429 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 383 [2020-09-04 23:16:48,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:48,432 INFO L225 Difference]: With dead ends: 423 [2020-09-04 23:16:48,432 INFO L226 Difference]: Without dead ends: 398 [2020-09-04 23:16:48,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-09-04 23:16:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-09-04 23:16:48,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 393. [2020-09-04 23:16:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-09-04 23:16:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 395 transitions. [2020-09-04 23:16:48,439 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 395 transitions. Word has length 383 [2020-09-04 23:16:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:48,439 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 395 transitions. [2020-09-04 23:16:48,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-09-04 23:16:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 395 transitions. [2020-09-04 23:16:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-09-04 23:16:48,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:48,442 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:48,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-09-04 23:16:48,443 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:48,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1870142923, now seen corresponding path program 50 times [2020-09-04 23:16:48,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:48,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472081662] [2020-09-04 23:16:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:57,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8987 backedges. 0 proven. 8976 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:16:57,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472081662] [2020-09-04 23:16:57,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:57,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2020-09-04 23:16:57,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863284491] [2020-09-04 23:16:57,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-09-04 23:16:57,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:57,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-09-04 23:16:57,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-09-04 23:16:57,212 INFO L87 Difference]: Start difference. First operand 393 states and 395 transitions. Second operand 106 states. [2020-09-04 23:17:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:11,312 INFO L93 Difference]: Finished difference Result 430 states and 434 transitions. [2020-09-04 23:17:11,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-09-04 23:17:11,314 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 390 [2020-09-04 23:17:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:11,317 INFO L225 Difference]: With dead ends: 430 [2020-09-04 23:17:11,317 INFO L226 Difference]: Without dead ends: 405 [2020-09-04 23:17:11,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-09-04 23:17:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-09-04 23:17:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 400. [2020-09-04 23:17:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-09-04 23:17:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 402 transitions. [2020-09-04 23:17:11,338 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 402 transitions. Word has length 390 [2020-09-04 23:17:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:11,338 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 402 transitions. [2020-09-04 23:17:11,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-09-04 23:17:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 402 transitions. [2020-09-04 23:17:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-09-04 23:17:11,340 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:11,340 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:11,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-09-04 23:17:11,340 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:11,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1663754692, now seen corresponding path program 51 times [2020-09-04 23:17:11,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:11,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608419331] [2020-09-04 23:17:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:20,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9345 backedges. 0 proven. 9334 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:17:21,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608419331] [2020-09-04 23:17:21,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:21,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2020-09-04 23:17:21,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246852802] [2020-09-04 23:17:21,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-09-04 23:17:21,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:21,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-09-04 23:17:21,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-09-04 23:17:21,054 INFO L87 Difference]: Start difference. First operand 400 states and 402 transitions. Second operand 108 states. [2020-09-04 23:17:37,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:37,335 INFO L93 Difference]: Finished difference Result 437 states and 441 transitions. [2020-09-04 23:17:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-09-04 23:17:37,337 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 397 [2020-09-04 23:17:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:37,340 INFO L225 Difference]: With dead ends: 437 [2020-09-04 23:17:37,340 INFO L226 Difference]: Without dead ends: 412 [2020-09-04 23:17:37,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-09-04 23:17:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-09-04 23:17:37,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 407. [2020-09-04 23:17:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-09-04 23:17:37,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 409 transitions. [2020-09-04 23:17:37,348 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 409 transitions. Word has length 397 [2020-09-04 23:17:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:37,348 INFO L479 AbstractCegarLoop]: Abstraction has 407 states and 409 transitions. [2020-09-04 23:17:37,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-09-04 23:17:37,349 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 409 transitions. [2020-09-04 23:17:37,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-09-04 23:17:37,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:37,351 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:37,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-09-04 23:17:37,351 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:37,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:37,351 INFO L82 PathProgramCache]: Analyzing trace with hash 147002197, now seen corresponding path program 52 times [2020-09-04 23:17:37,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:37,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602908327] [2020-09-04 23:17:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:48,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9710 backedges. 0 proven. 9699 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:17:48,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602908327] [2020-09-04 23:17:48,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:48,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2020-09-04 23:17:48,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420914984] [2020-09-04 23:17:48,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-09-04 23:17:48,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:48,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-09-04 23:17:48,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-09-04 23:17:48,262 INFO L87 Difference]: Start difference. First operand 407 states and 409 transitions. Second operand 110 states. [2020-09-04 23:18:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:06,691 INFO L93 Difference]: Finished difference Result 444 states and 448 transitions. [2020-09-04 23:18:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-09-04 23:18:06,694 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 404 [2020-09-04 23:18:06,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:06,696 INFO L225 Difference]: With dead ends: 444 [2020-09-04 23:18:06,696 INFO L226 Difference]: Without dead ends: 419 [2020-09-04 23:18:06,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-09-04 23:18:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2020-09-04 23:18:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 414. [2020-09-04 23:18:06,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-09-04 23:18:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 416 transitions. [2020-09-04 23:18:06,704 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 416 transitions. Word has length 404 [2020-09-04 23:18:06,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:06,705 INFO L479 AbstractCegarLoop]: Abstraction has 414 states and 416 transitions. [2020-09-04 23:18:06,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-09-04 23:18:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 416 transitions. [2020-09-04 23:18:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-09-04 23:18:06,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:06,707 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:06,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-09-04 23:18:06,707 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1481387172, now seen corresponding path program 53 times [2020-09-04 23:18:06,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:06,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555930358] [2020-09-04 23:18:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:18,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10082 backedges. 0 proven. 10071 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:18:18,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555930358] [2020-09-04 23:18:18,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:18,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2020-09-04 23:18:18,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761489664] [2020-09-04 23:18:18,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-09-04 23:18:18,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:18,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-09-04 23:18:18,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-09-04 23:18:18,985 INFO L87 Difference]: Start difference. First operand 414 states and 416 transitions. Second operand 112 states. [2020-09-04 23:18:39,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:39,547 INFO L93 Difference]: Finished difference Result 451 states and 455 transitions. [2020-09-04 23:18:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-09-04 23:18:39,549 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 411 [2020-09-04 23:18:39,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:39,551 INFO L225 Difference]: With dead ends: 451 [2020-09-04 23:18:39,552 INFO L226 Difference]: Without dead ends: 426 [2020-09-04 23:18:39,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-09-04 23:18:39,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-09-04 23:18:39,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 421. [2020-09-04 23:18:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-09-04 23:18:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 423 transitions. [2020-09-04 23:18:39,561 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 423 transitions. Word has length 411 [2020-09-04 23:18:39,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:39,561 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 423 transitions. [2020-09-04 23:18:39,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-09-04 23:18:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 423 transitions. [2020-09-04 23:18:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-04 23:18:39,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:39,563 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:39,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-09-04 23:18:39,564 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:39,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:39,564 INFO L82 PathProgramCache]: Analyzing trace with hash 948030581, now seen corresponding path program 54 times [2020-09-04 23:18:39,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:39,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146879827] [2020-09-04 23:18:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:53,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10461 backedges. 0 proven. 10450 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:18:53,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146879827] [2020-09-04 23:18:53,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:53,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2020-09-04 23:18:53,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115098324] [2020-09-04 23:18:53,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-09-04 23:18:53,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:53,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-09-04 23:18:53,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-09-04 23:18:53,431 INFO L87 Difference]: Start difference. First operand 421 states and 423 transitions. Second operand 114 states. [2020-09-04 23:19:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:16,848 INFO L93 Difference]: Finished difference Result 458 states and 462 transitions. [2020-09-04 23:19:16,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-09-04 23:19:16,851 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 418 [2020-09-04 23:19:16,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:16,853 INFO L225 Difference]: With dead ends: 458 [2020-09-04 23:19:16,853 INFO L226 Difference]: Without dead ends: 433 [2020-09-04 23:19:16,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-09-04 23:19:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-09-04 23:19:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 428. [2020-09-04 23:19:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-09-04 23:19:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 430 transitions. [2020-09-04 23:19:16,862 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 430 transitions. Word has length 418 [2020-09-04 23:19:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:16,862 INFO L479 AbstractCegarLoop]: Abstraction has 428 states and 430 transitions. [2020-09-04 23:19:16,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-09-04 23:19:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 430 transitions. [2020-09-04 23:19:16,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-09-04 23:19:16,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:16,865 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:16,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-09-04 23:19:16,865 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:16,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1281421188, now seen corresponding path program 55 times [2020-09-04 23:19:16,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:16,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103379858] [2020-09-04 23:19:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:32,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10847 backedges. 0 proven. 10836 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:19:32,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103379858] [2020-09-04 23:19:32,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:32,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2020-09-04 23:19:32,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708871219] [2020-09-04 23:19:32,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-09-04 23:19:32,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:32,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-09-04 23:19:32,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-09-04 23:19:32,813 INFO L87 Difference]: Start difference. First operand 428 states and 430 transitions. Second operand 116 states. [2020-09-04 23:19:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:58,359 INFO L93 Difference]: Finished difference Result 465 states and 469 transitions. [2020-09-04 23:19:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-09-04 23:19:58,363 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 425 [2020-09-04 23:19:58,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:58,366 INFO L225 Difference]: With dead ends: 465 [2020-09-04 23:19:58,366 INFO L226 Difference]: Without dead ends: 440 [2020-09-04 23:19:58,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-09-04 23:19:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-09-04 23:19:58,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 435. [2020-09-04 23:19:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-09-04 23:19:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 437 transitions. [2020-09-04 23:19:58,375 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 437 transitions. Word has length 425 [2020-09-04 23:19:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:58,375 INFO L479 AbstractCegarLoop]: Abstraction has 435 states and 437 transitions. [2020-09-04 23:19:58,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-09-04 23:19:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 437 transitions. [2020-09-04 23:19:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-09-04 23:19:58,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:58,378 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:58,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-09-04 23:19:58,378 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:58,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:58,378 INFO L82 PathProgramCache]: Analyzing trace with hash -822735467, now seen corresponding path program 56 times [2020-09-04 23:19:58,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:58,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360570134] [2020-09-04 23:19:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:16,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:20:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11240 backedges. 0 proven. 11229 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:20:16,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360570134] [2020-09-04 23:20:16,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:20:16,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2020-09-04 23:20:16,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472637016] [2020-09-04 23:20:16,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-09-04 23:20:16,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:20:16,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-09-04 23:20:16,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-09-04 23:20:16,703 INFO L87 Difference]: Start difference. First operand 435 states and 437 transitions. Second operand 118 states. [2020-09-04 23:20:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:20:46,987 INFO L93 Difference]: Finished difference Result 472 states and 476 transitions. [2020-09-04 23:20:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-09-04 23:20:46,991 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 432 [2020-09-04 23:20:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:20:46,995 INFO L225 Difference]: With dead ends: 472 [2020-09-04 23:20:46,995 INFO L226 Difference]: Without dead ends: 447 [2020-09-04 23:20:46,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-09-04 23:20:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-09-04 23:20:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 442. [2020-09-04 23:20:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-09-04 23:20:47,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 444 transitions. [2020-09-04 23:20:47,008 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 444 transitions. Word has length 432 [2020-09-04 23:20:47,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:20:47,008 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 444 transitions. [2020-09-04 23:20:47,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-09-04 23:20:47,009 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 444 transitions. [2020-09-04 23:20:47,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2020-09-04 23:20:47,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:20:47,012 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:20:47,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-09-04 23:20:47,012 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:20:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:20:47,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1945578084, now seen corresponding path program 57 times [2020-09-04 23:20:47,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:20:47,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438923346] [2020-09-04 23:20:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:20:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:07,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:21:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11640 backedges. 0 proven. 11629 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:21:08,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438923346] [2020-09-04 23:21:08,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:21:08,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2020-09-04 23:21:08,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717095476] [2020-09-04 23:21:08,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-09-04 23:21:08,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:21:08,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-09-04 23:21:08,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-09-04 23:21:08,011 INFO L87 Difference]: Start difference. First operand 442 states and 444 transitions. Second operand 120 states. [2020-09-04 23:21:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:21:40,382 INFO L93 Difference]: Finished difference Result 479 states and 483 transitions. [2020-09-04 23:21:40,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-09-04 23:21:40,386 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 439 [2020-09-04 23:21:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:21:40,389 INFO L225 Difference]: With dead ends: 479 [2020-09-04 23:21:40,390 INFO L226 Difference]: Without dead ends: 454 [2020-09-04 23:21:40,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-09-04 23:21:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-09-04 23:21:40,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 449. [2020-09-04 23:21:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-09-04 23:21:40,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 451 transitions. [2020-09-04 23:21:40,400 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 451 transitions. Word has length 439 [2020-09-04 23:21:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:21:40,400 INFO L479 AbstractCegarLoop]: Abstraction has 449 states and 451 transitions. [2020-09-04 23:21:40,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-09-04 23:21:40,401 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 451 transitions. [2020-09-04 23:21:40,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-09-04 23:21:40,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:21:40,403 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:21:40,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-09-04 23:21:40,403 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:21:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:21:40,404 INFO L82 PathProgramCache]: Analyzing trace with hash -70134091, now seen corresponding path program 58 times [2020-09-04 23:21:40,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:21:40,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110777751] [2020-09-04 23:21:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:21:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:03,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:22:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12047 backedges. 0 proven. 12036 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:22:03,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110777751] [2020-09-04 23:22:03,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:22:03,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2020-09-04 23:22:03,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856553090] [2020-09-04 23:22:03,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-09-04 23:22:03,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:22:03,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-09-04 23:22:03,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-09-04 23:22:03,851 INFO L87 Difference]: Start difference. First operand 449 states and 451 transitions. Second operand 122 states. [2020-09-04 23:22:42,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:22:42,836 INFO L93 Difference]: Finished difference Result 486 states and 490 transitions. [2020-09-04 23:22:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-09-04 23:22:42,842 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 446 [2020-09-04 23:22:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:22:42,845 INFO L225 Difference]: With dead ends: 486 [2020-09-04 23:22:42,845 INFO L226 Difference]: Without dead ends: 461 [2020-09-04 23:22:42,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 57.2s TimeCoverageRelationStatistics Valid=18000, Invalid=39360, Unknown=0, NotChecked=0, Total=57360 [2020-09-04 23:22:42,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-09-04 23:22:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 456. [2020-09-04 23:22:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-09-04 23:22:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 458 transitions. [2020-09-04 23:22:42,855 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 458 transitions. Word has length 446 [2020-09-04 23:22:42,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:22:42,856 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 458 transitions. [2020-09-04 23:22:42,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-09-04 23:22:42,856 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 458 transitions. [2020-09-04 23:22:42,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2020-09-04 23:22:42,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:22:42,859 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:22:42,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-09-04 23:22:42,859 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:22:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:22:42,860 INFO L82 PathProgramCache]: Analyzing trace with hash -216212156, now seen corresponding path program 59 times [2020-09-04 23:22:42,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:22:42,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025590167] [2020-09-04 23:22:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:22:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:09,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:23:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12461 backedges. 0 proven. 12450 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 23:23:09,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025590167] [2020-09-04 23:23:09,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:23:09,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2020-09-04 23:23:09,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878616954] [2020-09-04 23:23:09,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2020-09-04 23:23:09,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:23:09,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2020-09-04 23:23:09,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2020-09-04 23:23:09,797 INFO L87 Difference]: Start difference. First operand 456 states and 458 transitions. Second operand 124 states. [2020-09-04 23:23:54,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:23:54,546 INFO L93 Difference]: Finished difference Result 493 states and 497 transitions. [2020-09-04 23:23:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-09-04 23:23:54,551 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 453 [2020-09-04 23:23:54,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:23:54,555 INFO L225 Difference]: With dead ends: 493 [2020-09-04 23:23:54,555 INFO L226 Difference]: Without dead ends: 468 [2020-09-04 23:23:54,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10799 ImplicationChecksByTransitivity, 66.0s TimeCoverageRelationStatistics Valid=18605, Invalid=40687, Unknown=0, NotChecked=0, Total=59292 [2020-09-04 23:23:54,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-09-04 23:23:54,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 463. [2020-09-04 23:23:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-09-04 23:23:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 465 transitions. [2020-09-04 23:23:54,565 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 465 transitions. Word has length 453 [2020-09-04 23:23:54,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:23:54,566 INFO L479 AbstractCegarLoop]: Abstraction has 463 states and 465 transitions. [2020-09-04 23:23:54,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 124 states. [2020-09-04 23:23:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 465 transitions. [2020-09-04 23:23:54,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-04 23:23:54,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:23:54,569 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:23:54,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-09-04 23:23:54,570 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:23:54,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:23:54,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1891162155, now seen corresponding path program 60 times [2020-09-04 23:23:54,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:23:54,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83654327] [2020-09-04 23:23:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:23:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat