/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:33:58,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:33:58,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:33:58,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:33:58,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:33:58,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:33:58,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:33:58,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:33:58,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:33:58,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:33:58,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:33:58,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:33:58,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:33:58,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:33:58,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:33:58,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:33:58,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:33:58,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:33:58,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:33:58,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:33:58,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:33:58,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:33:58,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:33:58,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:33:58,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:33:58,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:33:58,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:33:58,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:33:58,206 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 16:33:58,218 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:33:58,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:33:58,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:33:58,220 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:33:58,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:33:58,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:33:58,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:33:58,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:33:58,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:33:58,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:33:58,221 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:33:58,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:33:58,222 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:33:58,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:33:58,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:33:58,222 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:33:58,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:33:58,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:33:58,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:33:58,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:33:58,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:33:58,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:33:58,224 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:33:58,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:33:58,681 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:33:58,686 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:33:58,688 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:33:58,689 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:33:58,690 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-09-04 16:33:58,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbf131799/7f8a107153ed43aca822ba2500e76747/FLAG8aada5fbc [2020-09-04 16:33:59,290 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:33:59,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-09-04 16:33:59,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbf131799/7f8a107153ed43aca822ba2500e76747/FLAG8aada5fbc [2020-09-04 16:33:59,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbf131799/7f8a107153ed43aca822ba2500e76747 [2020-09-04 16:33:59,635 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:33:59,637 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:33:59,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:33:59,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:33:59,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:33:59,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:33:59" (1/1) ... [2020-09-04 16:33:59,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d876c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:59, skipping insertion in model container [2020-09-04 16:33:59,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:33:59" (1/1) ... [2020-09-04 16:33:59,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:33:59,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:33:59,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:33:59,964 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:33:59,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:34:00,018 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:34:00,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:34:00 WrapperNode [2020-09-04 16:34:00,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:34:00,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:34:00,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:34:00,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:34:00,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:34:00" (1/1) ... [2020-09-04 16:34:00,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:34:00" (1/1) ... [2020-09-04 16:34:00,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:34:00" (1/1) ... [2020-09-04 16:34:00,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:34:00" (1/1) ... [2020-09-04 16:34:00,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:34:00" (1/1) ... [2020-09-04 16:34:00,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:34:00" (1/1) ... [2020-09-04 16:34:00,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:34:00" (1/1) ... [2020-09-04 16:34:00,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:34:00,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:34:00,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:34:00,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:34:00,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:34:00" (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 16:34:00,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:34:00,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:34:00,265 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:34:00,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:34:00,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:34:00,266 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:34:00,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:34:00,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:34:00,730 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:34:00,731 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 16:34:00,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:34:00 BoogieIcfgContainer [2020-09-04 16:34:00,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:34:00,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:34:00,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:34:00,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:34:00,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:33:59" (1/3) ... [2020-09-04 16:34:00,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59bbdf16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:34:00, skipping insertion in model container [2020-09-04 16:34:00,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:34:00" (2/3) ... [2020-09-04 16:34:00,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59bbdf16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:34:00, skipping insertion in model container [2020-09-04 16:34:00,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:34:00" (3/3) ... [2020-09-04 16:34:00,749 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-09-04 16:34:00,763 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:34:00,775 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:34:00,794 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:34:00,824 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:34:00,824 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:34:00,824 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:34:00,825 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:34:00,825 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:34:00,825 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:34:00,825 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:34:00,825 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:34:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-09-04 16:34:00,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 16:34:00,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:00,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:00,864 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:00,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:00,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1546178992, now seen corresponding path program 1 times [2020-09-04 16:34:00,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:00,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236880487] [2020-09-04 16:34:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:00,954 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:01,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:01,175 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 16:34:01,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236880487] [2020-09-04 16:34:01,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:01,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:01,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525693072] [2020-09-04 16:34:01,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:01,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:01,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:01,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:01,212 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 3 states. [2020-09-04 16:34:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:01,340 INFO L93 Difference]: Finished difference Result 279 states and 384 transitions. [2020-09-04 16:34:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:01,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-09-04 16:34:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:01,364 INFO L225 Difference]: With dead ends: 279 [2020-09-04 16:34:01,364 INFO L226 Difference]: Without dead ends: 192 [2020-09-04 16:34:01,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:01,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-04 16:34:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-09-04 16:34:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-09-04 16:34:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 252 transitions. [2020-09-04 16:34:01,459 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 252 transitions. Word has length 79 [2020-09-04 16:34:01,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:01,460 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 252 transitions. [2020-09-04 16:34:01,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:01,460 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 252 transitions. [2020-09-04 16:34:01,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-04 16:34:01,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:01,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:01,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:34:01,465 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:01,466 INFO L82 PathProgramCache]: Analyzing trace with hash 687152074, now seen corresponding path program 1 times [2020-09-04 16:34:01,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:01,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774936459] [2020-09-04 16:34:01,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:01,469 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:01,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:01,624 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 16:34:01,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774936459] [2020-09-04 16:34:01,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:01,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:01,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139212591] [2020-09-04 16:34:01,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:01,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:01,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:01,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:01,628 INFO L87 Difference]: Start difference. First operand 190 states and 252 transitions. Second operand 3 states. [2020-09-04 16:34:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:01,705 INFO L93 Difference]: Finished difference Result 466 states and 650 transitions. [2020-09-04 16:34:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:01,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-09-04 16:34:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:01,710 INFO L225 Difference]: With dead ends: 466 [2020-09-04 16:34:01,711 INFO L226 Difference]: Without dead ends: 325 [2020-09-04 16:34:01,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-09-04 16:34:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2020-09-04 16:34:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-09-04 16:34:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 442 transitions. [2020-09-04 16:34:01,762 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 442 transitions. Word has length 80 [2020-09-04 16:34:01,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:01,763 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 442 transitions. [2020-09-04 16:34:01,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 442 transitions. [2020-09-04 16:34:01,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-04 16:34:01,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:01,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:01,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:34:01,787 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:01,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:01,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1261830773, now seen corresponding path program 1 times [2020-09-04 16:34:01,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:01,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055512206] [2020-09-04 16:34:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:01,791 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:01,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:01,876 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 16:34:01,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055512206] [2020-09-04 16:34:01,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:01,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:01,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672725794] [2020-09-04 16:34:01,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:01,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:01,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:01,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:01,879 INFO L87 Difference]: Start difference. First operand 323 states and 442 transitions. Second operand 3 states. [2020-09-04 16:34:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:01,930 INFO L93 Difference]: Finished difference Result 397 states and 552 transitions. [2020-09-04 16:34:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:01,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-09-04 16:34:01,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:01,934 INFO L225 Difference]: With dead ends: 397 [2020-09-04 16:34:01,934 INFO L226 Difference]: Without dead ends: 395 [2020-09-04 16:34:01,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:01,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-09-04 16:34:01,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 323. [2020-09-04 16:34:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-09-04 16:34:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 440 transitions. [2020-09-04 16:34:01,973 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 440 transitions. Word has length 80 [2020-09-04 16:34:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:01,974 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 440 transitions. [2020-09-04 16:34:01,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 440 transitions. [2020-09-04 16:34:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-04 16:34:01,976 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:01,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:01,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:34:01,977 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:01,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:01,978 INFO L82 PathProgramCache]: Analyzing trace with hash 397182858, now seen corresponding path program 1 times [2020-09-04 16:34:01,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:01,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022056363] [2020-09-04 16:34:01,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:01,980 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:02,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:02,046 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 16:34:02,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022056363] [2020-09-04 16:34:02,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:02,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:02,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335595834] [2020-09-04 16:34:02,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:02,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:02,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:02,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:02,049 INFO L87 Difference]: Start difference. First operand 323 states and 440 transitions. Second operand 3 states. [2020-09-04 16:34:02,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:02,089 INFO L93 Difference]: Finished difference Result 395 states and 546 transitions. [2020-09-04 16:34:02,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:02,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-09-04 16:34:02,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:02,093 INFO L225 Difference]: With dead ends: 395 [2020-09-04 16:34:02,093 INFO L226 Difference]: Without dead ends: 393 [2020-09-04 16:34:02,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:02,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-09-04 16:34:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 323. [2020-09-04 16:34:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-09-04 16:34:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 438 transitions. [2020-09-04 16:34:02,124 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 438 transitions. Word has length 81 [2020-09-04 16:34:02,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:02,125 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 438 transitions. [2020-09-04 16:34:02,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 438 transitions. [2020-09-04 16:34:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-04 16:34:02,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:02,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:02,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:34:02,128 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:02,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:02,128 INFO L82 PathProgramCache]: Analyzing trace with hash -172878236, now seen corresponding path program 1 times [2020-09-04 16:34:02,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:02,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102821083] [2020-09-04 16:34:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:02,131 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:02,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:02,196 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 16:34:02,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102821083] [2020-09-04 16:34:02,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:02,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:02,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123971231] [2020-09-04 16:34:02,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:02,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:02,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:02,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:02,199 INFO L87 Difference]: Start difference. First operand 323 states and 438 transitions. Second operand 3 states. [2020-09-04 16:34:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:02,259 INFO L93 Difference]: Finished difference Result 859 states and 1200 transitions. [2020-09-04 16:34:02,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:02,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-09-04 16:34:02,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:02,264 INFO L225 Difference]: With dead ends: 859 [2020-09-04 16:34:02,265 INFO L226 Difference]: Without dead ends: 585 [2020-09-04 16:34:02,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:02,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-09-04 16:34:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 583. [2020-09-04 16:34:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-09-04 16:34:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 802 transitions. [2020-09-04 16:34:02,316 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 802 transitions. Word has length 81 [2020-09-04 16:34:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:02,316 INFO L479 AbstractCegarLoop]: Abstraction has 583 states and 802 transitions. [2020-09-04 16:34:02,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:02,317 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 802 transitions. [2020-09-04 16:34:02,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-04 16:34:02,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:02,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:02,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:34:02,320 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:02,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1064013698, now seen corresponding path program 1 times [2020-09-04 16:34:02,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:02,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363148269] [2020-09-04 16:34:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:02,323 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:02,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:02,383 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 16:34:02,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363148269] [2020-09-04 16:34:02,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:02,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:02,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409585480] [2020-09-04 16:34:02,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:02,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:02,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:02,387 INFO L87 Difference]: Start difference. First operand 583 states and 802 transitions. Second operand 3 states. [2020-09-04 16:34:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:02,519 INFO L93 Difference]: Finished difference Result 1627 states and 2276 transitions. [2020-09-04 16:34:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:02,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-09-04 16:34:02,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:02,526 INFO L225 Difference]: With dead ends: 1627 [2020-09-04 16:34:02,527 INFO L226 Difference]: Without dead ends: 1093 [2020-09-04 16:34:02,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2020-09-04 16:34:02,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1091. [2020-09-04 16:34:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2020-09-04 16:34:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1506 transitions. [2020-09-04 16:34:02,614 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1506 transitions. Word has length 82 [2020-09-04 16:34:02,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:02,615 INFO L479 AbstractCegarLoop]: Abstraction has 1091 states and 1506 transitions. [2020-09-04 16:34:02,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1506 transitions. [2020-09-04 16:34:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-04 16:34:02,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:02,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:02,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 16:34:02,618 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:02,618 INFO L82 PathProgramCache]: Analyzing trace with hash -637098359, now seen corresponding path program 1 times [2020-09-04 16:34:02,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:02,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109675745] [2020-09-04 16:34:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:02,621 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:02,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:02,669 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 16:34:02,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109675745] [2020-09-04 16:34:02,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:02,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:02,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739756604] [2020-09-04 16:34:02,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:02,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:02,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:02,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:02,672 INFO L87 Difference]: Start difference. First operand 1091 states and 1506 transitions. Second operand 3 states. [2020-09-04 16:34:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:02,771 INFO L93 Difference]: Finished difference Result 1343 states and 1876 transitions. [2020-09-04 16:34:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:02,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-09-04 16:34:02,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:02,779 INFO L225 Difference]: With dead ends: 1343 [2020-09-04 16:34:02,779 INFO L226 Difference]: Without dead ends: 1341 [2020-09-04 16:34:02,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2020-09-04 16:34:02,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1091. [2020-09-04 16:34:02,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2020-09-04 16:34:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1498 transitions. [2020-09-04 16:34:02,862 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1498 transitions. Word has length 82 [2020-09-04 16:34:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:02,862 INFO L479 AbstractCegarLoop]: Abstraction has 1091 states and 1498 transitions. [2020-09-04 16:34:02,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1498 transitions. [2020-09-04 16:34:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-04 16:34:02,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:02,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:02,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 16:34:02,865 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:02,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:02,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1659922654, now seen corresponding path program 1 times [2020-09-04 16:34:02,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:02,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158372325] [2020-09-04 16:34:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:02,868 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:02,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:02,936 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 16:34:02,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158372325] [2020-09-04 16:34:02,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:02,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:02,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336053155] [2020-09-04 16:34:02,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:02,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:02,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:02,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:02,938 INFO L87 Difference]: Start difference. First operand 1091 states and 1498 transitions. Second operand 3 states. [2020-09-04 16:34:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:03,039 INFO L93 Difference]: Finished difference Result 1335 states and 1852 transitions. [2020-09-04 16:34:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:03,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-09-04 16:34:03,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:03,047 INFO L225 Difference]: With dead ends: 1335 [2020-09-04 16:34:03,047 INFO L226 Difference]: Without dead ends: 1333 [2020-09-04 16:34:03,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:03,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2020-09-04 16:34:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1091. [2020-09-04 16:34:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2020-09-04 16:34:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1490 transitions. [2020-09-04 16:34:03,138 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1490 transitions. Word has length 83 [2020-09-04 16:34:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:03,139 INFO L479 AbstractCegarLoop]: Abstraction has 1091 states and 1490 transitions. [2020-09-04 16:34:03,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1490 transitions. [2020-09-04 16:34:03,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-04 16:34:03,141 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:03,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:03,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 16:34:03,142 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:03,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:03,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1375558424, now seen corresponding path program 1 times [2020-09-04 16:34:03,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:03,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765032421] [2020-09-04 16:34:03,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:03,147 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:03,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:03,211 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 16:34:03,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765032421] [2020-09-04 16:34:03,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:03,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:03,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143858960] [2020-09-04 16:34:03,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:03,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:03,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:03,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:03,214 INFO L87 Difference]: Start difference. First operand 1091 states and 1490 transitions. Second operand 3 states. [2020-09-04 16:34:03,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:03,412 INFO L93 Difference]: Finished difference Result 3127 states and 4308 transitions. [2020-09-04 16:34:03,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:03,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-09-04 16:34:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:03,424 INFO L225 Difference]: With dead ends: 3127 [2020-09-04 16:34:03,425 INFO L226 Difference]: Without dead ends: 2085 [2020-09-04 16:34:03,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2020-09-04 16:34:03,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 2083. [2020-09-04 16:34:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2020-09-04 16:34:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 2834 transitions. [2020-09-04 16:34:03,566 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 2834 transitions. Word has length 83 [2020-09-04 16:34:03,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:03,567 INFO L479 AbstractCegarLoop]: Abstraction has 2083 states and 2834 transitions. [2020-09-04 16:34:03,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 2834 transitions. [2020-09-04 16:34:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-04 16:34:03,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:03,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:03,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 16:34:03,572 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:03,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:03,572 INFO L82 PathProgramCache]: Analyzing trace with hash -146869603, now seen corresponding path program 1 times [2020-09-04 16:34:03,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:03,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892745374] [2020-09-04 16:34:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:03,574 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:03,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:03,625 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 16:34:03,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892745374] [2020-09-04 16:34:03,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:03,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:03,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968512479] [2020-09-04 16:34:03,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:03,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:03,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:03,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:03,628 INFO L87 Difference]: Start difference. First operand 2083 states and 2834 transitions. Second operand 3 states. [2020-09-04 16:34:03,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:03,794 INFO L93 Difference]: Finished difference Result 2535 states and 3476 transitions. [2020-09-04 16:34:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:03,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-09-04 16:34:03,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:03,809 INFO L225 Difference]: With dead ends: 2535 [2020-09-04 16:34:03,809 INFO L226 Difference]: Without dead ends: 2533 [2020-09-04 16:34:03,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2020-09-04 16:34:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2083. [2020-09-04 16:34:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2020-09-04 16:34:03,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 2818 transitions. [2020-09-04 16:34:03,990 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 2818 transitions. Word has length 84 [2020-09-04 16:34:03,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:03,990 INFO L479 AbstractCegarLoop]: Abstraction has 2083 states and 2818 transitions. [2020-09-04 16:34:03,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 2818 transitions. [2020-09-04 16:34:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-04 16:34:03,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:03,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:03,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 16:34:03,994 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:03,994 INFO L82 PathProgramCache]: Analyzing trace with hash -307116750, now seen corresponding path program 1 times [2020-09-04 16:34:03,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:03,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94958383] [2020-09-04 16:34:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:03,997 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:04,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:04,040 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 16:34:04,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94958383] [2020-09-04 16:34:04,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:04,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:04,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588750581] [2020-09-04 16:34:04,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:04,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:04,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:04,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:04,043 INFO L87 Difference]: Start difference. First operand 2083 states and 2818 transitions. Second operand 3 states. [2020-09-04 16:34:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:04,318 INFO L93 Difference]: Finished difference Result 6055 states and 8228 transitions. [2020-09-04 16:34:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:04,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-09-04 16:34:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:04,339 INFO L225 Difference]: With dead ends: 6055 [2020-09-04 16:34:04,339 INFO L226 Difference]: Without dead ends: 4021 [2020-09-04 16:34:04,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:04,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2020-09-04 16:34:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 4019. [2020-09-04 16:34:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4019 states. [2020-09-04 16:34:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4019 states to 4019 states and 5394 transitions. [2020-09-04 16:34:04,610 INFO L78 Accepts]: Start accepts. Automaton has 4019 states and 5394 transitions. Word has length 84 [2020-09-04 16:34:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:04,611 INFO L479 AbstractCegarLoop]: Abstraction has 4019 states and 5394 transitions. [2020-09-04 16:34:04,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:04,611 INFO L276 IsEmpty]: Start isEmpty. Operand 4019 states and 5394 transitions. [2020-09-04 16:34:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 16:34:04,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:04,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:04,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 16:34:04,616 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:04,616 INFO L82 PathProgramCache]: Analyzing trace with hash -322854350, now seen corresponding path program 1 times [2020-09-04 16:34:04,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:04,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499288484] [2020-09-04 16:34:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:04,619 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:04,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:04,660 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 16:34:04,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499288484] [2020-09-04 16:34:04,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:04,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:04,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675541582] [2020-09-04 16:34:04,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:04,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:04,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:04,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:04,663 INFO L87 Difference]: Start difference. First operand 4019 states and 5394 transitions. Second operand 3 states. [2020-09-04 16:34:04,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:04,929 INFO L93 Difference]: Finished difference Result 4855 states and 6548 transitions. [2020-09-04 16:34:04,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:04,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-09-04 16:34:04,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:04,953 INFO L225 Difference]: With dead ends: 4855 [2020-09-04 16:34:04,953 INFO L226 Difference]: Without dead ends: 4853 [2020-09-04 16:34:04,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:04,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2020-09-04 16:34:05,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 4019. [2020-09-04 16:34:05,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4019 states. [2020-09-04 16:34:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4019 states to 4019 states and 5362 transitions. [2020-09-04 16:34:05,230 INFO L78 Accepts]: Start accepts. Automaton has 4019 states and 5362 transitions. Word has length 85 [2020-09-04 16:34:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:05,230 INFO L479 AbstractCegarLoop]: Abstraction has 4019 states and 5362 transitions. [2020-09-04 16:34:05,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 4019 states and 5362 transitions. [2020-09-04 16:34:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 16:34:05,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:05,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:05,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 16:34:05,235 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:05,235 INFO L82 PathProgramCache]: Analyzing trace with hash -930439220, now seen corresponding path program 1 times [2020-09-04 16:34:05,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:05,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685807949] [2020-09-04 16:34:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:05,237 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:05,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:05,268 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 16:34:05,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685807949] [2020-09-04 16:34:05,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:05,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:05,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752191817] [2020-09-04 16:34:05,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:05,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:05,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:05,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:05,271 INFO L87 Difference]: Start difference. First operand 4019 states and 5362 transitions. Second operand 3 states. [2020-09-04 16:34:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:05,638 INFO L93 Difference]: Finished difference Result 11767 states and 15732 transitions. [2020-09-04 16:34:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:05,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-09-04 16:34:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:05,681 INFO L225 Difference]: With dead ends: 11767 [2020-09-04 16:34:05,682 INFO L226 Difference]: Without dead ends: 7797 [2020-09-04 16:34:05,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7797 states. [2020-09-04 16:34:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7797 to 7795. [2020-09-04 16:34:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7795 states. [2020-09-04 16:34:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 10290 transitions. [2020-09-04 16:34:06,227 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 10290 transitions. Word has length 85 [2020-09-04 16:34:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:06,228 INFO L479 AbstractCegarLoop]: Abstraction has 7795 states and 10290 transitions. [2020-09-04 16:34:06,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 10290 transitions. [2020-09-04 16:34:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 16:34:06,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:06,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:06,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 16:34:06,236 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:06,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1483413839, now seen corresponding path program 1 times [2020-09-04 16:34:06,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:06,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284216846] [2020-09-04 16:34:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:06,238 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:06,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:06,274 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 16:34:06,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284216846] [2020-09-04 16:34:06,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:06,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:06,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424726025] [2020-09-04 16:34:06,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:06,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:06,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:06,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:06,277 INFO L87 Difference]: Start difference. First operand 7795 states and 10290 transitions. Second operand 3 states. [2020-09-04 16:34:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:06,751 INFO L93 Difference]: Finished difference Result 9335 states and 12340 transitions. [2020-09-04 16:34:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:06,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-09-04 16:34:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:06,779 INFO L225 Difference]: With dead ends: 9335 [2020-09-04 16:34:06,779 INFO L226 Difference]: Without dead ends: 9333 [2020-09-04 16:34:06,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:06,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9333 states. [2020-09-04 16:34:07,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9333 to 7795. [2020-09-04 16:34:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7795 states. [2020-09-04 16:34:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 10226 transitions. [2020-09-04 16:34:07,366 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 10226 transitions. Word has length 86 [2020-09-04 16:34:07,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:07,367 INFO L479 AbstractCegarLoop]: Abstraction has 7795 states and 10226 transitions. [2020-09-04 16:34:07,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 10226 transitions. [2020-09-04 16:34:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 16:34:07,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:07,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:07,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 16:34:07,374 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:07,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:07,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1221401062, now seen corresponding path program 1 times [2020-09-04 16:34:07,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:07,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392833991] [2020-09-04 16:34:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:07,377 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:07,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:07,418 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 16:34:07,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392833991] [2020-09-04 16:34:07,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:07,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:07,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633357272] [2020-09-04 16:34:07,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:07,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:07,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:07,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:07,421 INFO L87 Difference]: Start difference. First operand 7795 states and 10226 transitions. Second operand 3 states. [2020-09-04 16:34:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:08,663 INFO L93 Difference]: Finished difference Result 22903 states and 30068 transitions. [2020-09-04 16:34:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:08,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-09-04 16:34:08,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:08,738 INFO L225 Difference]: With dead ends: 22903 [2020-09-04 16:34:08,738 INFO L226 Difference]: Without dead ends: 15157 [2020-09-04 16:34:08,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15157 states. [2020-09-04 16:34:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15157 to 15155. [2020-09-04 16:34:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15155 states. [2020-09-04 16:34:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15155 states to 15155 states and 19634 transitions. [2020-09-04 16:34:10,248 INFO L78 Accepts]: Start accepts. Automaton has 15155 states and 19634 transitions. Word has length 86 [2020-09-04 16:34:10,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:10,248 INFO L479 AbstractCegarLoop]: Abstraction has 15155 states and 19634 transitions. [2020-09-04 16:34:10,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 15155 states and 19634 transitions. [2020-09-04 16:34:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-04 16:34:10,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:10,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:10,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 16:34:10,261 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1193948038, now seen corresponding path program 1 times [2020-09-04 16:34:10,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:10,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256587395] [2020-09-04 16:34:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:10,263 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:10,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:10,309 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 16:34:10,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256587395] [2020-09-04 16:34:10,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:10,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:10,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698714378] [2020-09-04 16:34:10,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:10,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:10,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:10,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:10,312 INFO L87 Difference]: Start difference. First operand 15155 states and 19634 transitions. Second operand 3 states. [2020-09-04 16:34:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:11,353 INFO L93 Difference]: Finished difference Result 17975 states and 23220 transitions. [2020-09-04 16:34:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:11,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-09-04 16:34:11,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:11,396 INFO L225 Difference]: With dead ends: 17975 [2020-09-04 16:34:11,397 INFO L226 Difference]: Without dead ends: 17973 [2020-09-04 16:34:11,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17973 states. [2020-09-04 16:34:12,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17973 to 15155. [2020-09-04 16:34:12,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15155 states. [2020-09-04 16:34:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15155 states to 15155 states and 19506 transitions. [2020-09-04 16:34:12,489 INFO L78 Accepts]: Start accepts. Automaton has 15155 states and 19506 transitions. Word has length 87 [2020-09-04 16:34:12,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:12,489 INFO L479 AbstractCegarLoop]: Abstraction has 15155 states and 19506 transitions. [2020-09-04 16:34:12,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:12,490 INFO L276 IsEmpty]: Start isEmpty. Operand 15155 states and 19506 transitions. [2020-09-04 16:34:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-04 16:34:12,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:12,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:12,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 16:34:12,502 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:12,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:12,502 INFO L82 PathProgramCache]: Analyzing trace with hash -791026560, now seen corresponding path program 1 times [2020-09-04 16:34:12,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:12,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754751442] [2020-09-04 16:34:12,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:12,504 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:12,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:12,536 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 16:34:12,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754751442] [2020-09-04 16:34:12,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:12,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:12,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597758463] [2020-09-04 16:34:12,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:12,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:12,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:12,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:12,538 INFO L87 Difference]: Start difference. First operand 15155 states and 19506 transitions. Second operand 3 states. [2020-09-04 16:34:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:13,711 INFO L93 Difference]: Finished difference Result 44599 states and 57396 transitions. [2020-09-04 16:34:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:13,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-09-04 16:34:13,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:13,794 INFO L225 Difference]: With dead ends: 44599 [2020-09-04 16:34:13,794 INFO L226 Difference]: Without dead ends: 29493 [2020-09-04 16:34:13,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29493 states. [2020-09-04 16:34:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29493 to 29491. [2020-09-04 16:34:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29491 states. [2020-09-04 16:34:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29491 states to 29491 states and 37426 transitions. [2020-09-04 16:34:15,830 INFO L78 Accepts]: Start accepts. Automaton has 29491 states and 37426 transitions. Word has length 87 [2020-09-04 16:34:15,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:15,831 INFO L479 AbstractCegarLoop]: Abstraction has 29491 states and 37426 transitions. [2020-09-04 16:34:15,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 29491 states and 37426 transitions. [2020-09-04 16:34:15,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-04 16:34:15,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:15,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:15,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 16:34:15,850 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1707179323, now seen corresponding path program 1 times [2020-09-04 16:34:15,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:15,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934258865] [2020-09-04 16:34:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:15,853 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:16,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:16,019 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 16:34:16,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934258865] [2020-09-04 16:34:16,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:16,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:16,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324363027] [2020-09-04 16:34:16,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:16,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:16,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:16,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:16,027 INFO L87 Difference]: Start difference. First operand 29491 states and 37426 transitions. Second operand 3 states. [2020-09-04 16:34:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:17,644 INFO L93 Difference]: Finished difference Result 34615 states and 43572 transitions. [2020-09-04 16:34:17,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:17,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-09-04 16:34:17,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:17,724 INFO L225 Difference]: With dead ends: 34615 [2020-09-04 16:34:17,724 INFO L226 Difference]: Without dead ends: 34613 [2020-09-04 16:34:17,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:17,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34613 states. [2020-09-04 16:34:19,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34613 to 29491. [2020-09-04 16:34:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29491 states. [2020-09-04 16:34:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29491 states to 29491 states and 37170 transitions. [2020-09-04 16:34:19,235 INFO L78 Accepts]: Start accepts. Automaton has 29491 states and 37170 transitions. Word has length 88 [2020-09-04 16:34:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:19,235 INFO L479 AbstractCegarLoop]: Abstraction has 29491 states and 37170 transitions. [2020-09-04 16:34:19,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 29491 states and 37170 transitions. [2020-09-04 16:34:19,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-04 16:34:19,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:19,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:19,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 16:34:19,248 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:19,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1248226970, now seen corresponding path program 1 times [2020-09-04 16:34:19,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:19,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412011912] [2020-09-04 16:34:19,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:19,252 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:19,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:19,288 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 16:34:19,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412011912] [2020-09-04 16:34:19,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:19,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:19,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106394333] [2020-09-04 16:34:19,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:19,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:19,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:19,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:19,290 INFO L87 Difference]: Start difference. First operand 29491 states and 37170 transitions. Second operand 3 states. [2020-09-04 16:34:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:22,449 INFO L93 Difference]: Finished difference Result 86839 states and 109364 transitions. [2020-09-04 16:34:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:22,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-09-04 16:34:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:22,565 INFO L225 Difference]: With dead ends: 86839 [2020-09-04 16:34:22,565 INFO L226 Difference]: Without dead ends: 57397 [2020-09-04 16:34:22,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57397 states. [2020-09-04 16:34:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57397 to 57395. [2020-09-04 16:34:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57395 states. [2020-09-04 16:34:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57395 states to 57395 states and 71218 transitions. [2020-09-04 16:34:25,647 INFO L78 Accepts]: Start accepts. Automaton has 57395 states and 71218 transitions. Word has length 88 [2020-09-04 16:34:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:25,647 INFO L479 AbstractCegarLoop]: Abstraction has 57395 states and 71218 transitions. [2020-09-04 16:34:25,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 57395 states and 71218 transitions. [2020-09-04 16:34:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-04 16:34:25,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:25,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:25,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 16:34:25,667 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:25,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:25,668 INFO L82 PathProgramCache]: Analyzing trace with hash 40577332, now seen corresponding path program 1 times [2020-09-04 16:34:25,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:25,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127899946] [2020-09-04 16:34:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:25,670 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:25,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:25,697 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 16:34:25,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127899946] [2020-09-04 16:34:25,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:25,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:25,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658681830] [2020-09-04 16:34:25,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:25,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:25,699 INFO L87 Difference]: Start difference. First operand 57395 states and 71218 transitions. Second operand 3 states. [2020-09-04 16:34:31,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:31,556 INFO L93 Difference]: Finished difference Result 169015 states and 209460 transitions. [2020-09-04 16:34:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:31,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-09-04 16:34:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:31,682 INFO L225 Difference]: With dead ends: 169015 [2020-09-04 16:34:31,682 INFO L226 Difference]: Without dead ends: 85301 [2020-09-04 16:34:31,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85301 states. [2020-09-04 16:34:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85301 to 85299. [2020-09-04 16:34:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85299 states. [2020-09-04 16:34:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85299 states to 85299 states and 103218 transitions. [2020-09-04 16:34:38,299 INFO L78 Accepts]: Start accepts. Automaton has 85299 states and 103218 transitions. Word has length 89 [2020-09-04 16:34:38,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:38,300 INFO L479 AbstractCegarLoop]: Abstraction has 85299 states and 103218 transitions. [2020-09-04 16:34:38,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 85299 states and 103218 transitions. [2020-09-04 16:34:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-04 16:34:38,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:38,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:38,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 16:34:38,326 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:38,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:38,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1447813926, now seen corresponding path program 1 times [2020-09-04 16:34:38,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:38,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879369616] [2020-09-04 16:34:38,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:38,328 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:38,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:38,362 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 16:34:38,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879369616] [2020-09-04 16:34:38,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:38,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:38,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934644373] [2020-09-04 16:34:38,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:38,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:38,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:38,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:38,364 INFO L87 Difference]: Start difference. First operand 85299 states and 103218 transitions. Second operand 3 states. [2020-09-04 16:34:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:42,418 INFO L93 Difference]: Finished difference Result 94519 states and 112948 transitions. [2020-09-04 16:34:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:42,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-09-04 16:34:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:42,525 INFO L225 Difference]: With dead ends: 94519 [2020-09-04 16:34:42,525 INFO L226 Difference]: Without dead ends: 66613 [2020-09-04 16:34:42,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66613 states. [2020-09-04 16:34:47,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66613 to 57395. [2020-09-04 16:34:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57395 states. [2020-09-04 16:34:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57395 states to 57395 states and 68658 transitions. [2020-09-04 16:34:47,879 INFO L78 Accepts]: Start accepts. Automaton has 57395 states and 68658 transitions. Word has length 89 [2020-09-04 16:34:47,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:47,880 INFO L479 AbstractCegarLoop]: Abstraction has 57395 states and 68658 transitions. [2020-09-04 16:34:47,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:47,880 INFO L276 IsEmpty]: Start isEmpty. Operand 57395 states and 68658 transitions. [2020-09-04 16:34:47,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-04 16:34:47,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:34:47,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:34:47,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 16:34:47,897 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:34:47,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:34:47,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1997420839, now seen corresponding path program 1 times [2020-09-04 16:34:47,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:34:47,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873256679] [2020-09-04 16:34:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:34:47,899 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:34:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:47,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:34:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:34:47,936 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 16:34:47,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873256679] [2020-09-04 16:34:47,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:34:47,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:34:47,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397817806] [2020-09-04 16:34:47,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:34:47,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:34:47,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:34:47,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:34:47,938 INFO L87 Difference]: Start difference. First operand 57395 states and 68658 transitions. Second operand 3 states. [2020-09-04 16:34:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:34:50,422 INFO L93 Difference]: Finished difference Result 57395 states and 68658 transitions. [2020-09-04 16:34:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:34:50,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-09-04 16:34:50,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:34:50,423 INFO L225 Difference]: With dead ends: 57395 [2020-09-04 16:34:50,423 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 16:34:50,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:34:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 16:34:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 16:34:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 16:34:50,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 16:34:50,475 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2020-09-04 16:34:50,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:34:50,475 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 16:34:50,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:34:50,476 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 16:34:50,476 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 16:34:50,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 16:34:50,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 16:35:05,885 WARN L193 SmtUtils]: Spent 15.28 s on a formula simplification. DAG size of input: 2085 DAG size of output: 91 [2020-09-04 16:35:09,388 WARN L193 SmtUtils]: Spent 3.50 s on a formula simplification. DAG size of input: 1051 DAG size of output: 15 [2020-09-04 16:35:36,323 WARN L193 SmtUtils]: Spent 26.93 s on a formula simplification. DAG size of input: 3629 DAG size of output: 15 [2020-09-04 16:35:53,826 WARN L193 SmtUtils]: Spent 17.50 s on a formula simplification. DAG size of input: 1071 DAG size of output: 553 [2020-09-04 16:36:11,012 WARN L193 SmtUtils]: Spent 17.18 s on a formula simplification. DAG size of input: 4137 DAG size of output: 3 [2020-09-04 16:36:34,245 WARN L193 SmtUtils]: Spent 23.22 s on a formula simplification. DAG size of input: 2089 DAG size of output: 291 [2020-09-04 16:36:37,693 WARN L193 SmtUtils]: Spent 3.44 s on a formula simplification. DAG size of input: 1055 DAG size of output: 35 [2020-09-04 16:36:55,518 WARN L193 SmtUtils]: Spent 17.82 s on a formula simplification. DAG size of input: 2146 DAG size of output: 159 [2020-09-04 16:36:59,541 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 1167 DAG size of output: 57 [2020-09-04 16:37:04,213 WARN L193 SmtUtils]: Spent 4.67 s on a formula simplification. DAG size of input: 1453 DAG size of output: 25 [2020-09-04 16:38:06,206 WARN L193 SmtUtils]: Spent 1.03 m on a formula simplification. DAG size of input: 2093 DAG size of output: 1067 [2020-09-04 16:38:10,518 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 1059 DAG size of output: 91 [2020-09-04 16:38:43,967 WARN L193 SmtUtils]: Spent 33.45 s on a formula simplification that was a NOOP. DAG size: 1069 [2020-09-04 16:39:09,413 WARN L193 SmtUtils]: Spent 25.44 s on a formula simplification. DAG size of input: 5162 DAG size of output: 7 [2020-09-04 16:39:18,765 WARN L193 SmtUtils]: Spent 9.35 s on a formula simplification. DAG size of input: 1078 DAG size of output: 293 [2020-09-04 16:39:30,702 WARN L193 SmtUtils]: Spent 11.93 s on a formula simplification. DAG size of input: 2073 DAG size of output: 7 [2020-09-04 16:39:39,577 WARN L193 SmtUtils]: Spent 8.86 s on a formula simplification. DAG size of input: 1063 DAG size of output: 291 [2020-09-04 16:39:54,299 WARN L193 SmtUtils]: Spent 14.72 s on a formula simplification. DAG size of input: 2193 DAG size of output: 91 [2020-09-04 16:39:58,245 WARN L193 SmtUtils]: Spent 3.94 s on a formula simplification. DAG size of input: 1262 DAG size of output: 37 [2020-09-04 16:40:05,244 WARN L193 SmtUtils]: Spent 6.99 s on a formula simplification. DAG size of input: 1836 DAG size of output: 17 [2020-09-04 16:40:17,749 WARN L193 SmtUtils]: Spent 12.50 s on a formula simplification. DAG size of input: 2079 DAG size of output: 23 [2020-09-04 16:40:48,046 WARN L193 SmtUtils]: Spent 30.29 s on a formula simplification that was a NOOP. DAG size: 1067 [2020-09-04 16:41:05,038 WARN L193 SmtUtils]: Spent 16.99 s on a formula simplification. DAG size of input: 1071 DAG size of output: 553 [2020-09-04 16:41:11,097 WARN L193 SmtUtils]: Spent 6.05 s on a formula simplification. DAG size of input: 1089 DAG size of output: 161 [2020-09-04 16:41:24,154 WARN L193 SmtUtils]: Spent 13.05 s on a formula simplification. DAG size of input: 2083 DAG size of output: 55 [2020-09-04 16:41:27,247 WARN L193 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 1047 DAG size of output: 7 [2020-09-04 16:41:40,937 WARN L193 SmtUtils]: Spent 13.68 s on a formula simplification. DAG size of input: 2288 DAG size of output: 55 [2020-09-04 16:41:45,449 WARN L193 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 1453 DAG size of output: 25 [2020-09-04 16:42:00,998 WARN L193 SmtUtils]: Spent 15.55 s on a formula simplification. DAG size of input: 2603 DAG size of output: 11 [2020-09-04 16:42:18,218 WARN L193 SmtUtils]: Spent 17.21 s on a formula simplification. DAG size of input: 2087 DAG size of output: 159 [2020-09-04 16:42:21,488 WARN L193 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 1053 DAG size of output: 23 [2020-09-04 16:43:23,821 WARN L193 SmtUtils]: Spent 1.04 m on a formula simplification. DAG size of input: 2100 DAG size of output: 1067 [2020-09-04 16:43:33,157 WARN L193 SmtUtils]: Spent 9.33 s on a formula simplification. DAG size of input: 1078 DAG size of output: 293 [2020-09-04 16:43:37,782 WARN L193 SmtUtils]: Spent 4.62 s on a formula simplification. DAG size of input: 1120 DAG size of output: 93 [2020-09-04 16:44:12,488 WARN L193 SmtUtils]: Spent 34.70 s on a formula simplification. DAG size of input: 2091 DAG size of output: 551 [2020-09-04 16:44:16,207 WARN L193 SmtUtils]: Spent 3.71 s on a formula simplification. DAG size of input: 1057 DAG size of output: 55 [2020-09-04 16:44:30,205 WARN L193 SmtUtils]: Spent 13.99 s on a formula simplification. DAG size of input: 2479 DAG size of output: 35 [2020-09-04 16:44:37,263 WARN L193 SmtUtils]: Spent 7.06 s on a formula simplification. DAG size of input: 1836 DAG size of output: 17 [2020-09-04 16:44:53,780 WARN L193 SmtUtils]: Spent 16.51 s on a formula simplification. DAG size of input: 4137 DAG size of output: 3 [2020-09-04 16:46:53,533 WARN L193 SmtUtils]: Spent 2.00 m on a formula simplification that was a NOOP. DAG size: 2095 [2020-09-04 16:47:28,779 WARN L193 SmtUtils]: Spent 35.24 s on a formula simplification. DAG size of input: 2104 DAG size of output: 551 [2020-09-04 16:47:34,538 WARN L193 SmtUtils]: Spent 5.75 s on a formula simplification. DAG size of input: 1061 DAG size of output: 159 [2020-09-04 16:47:40,611 WARN L193 SmtUtils]: Spent 6.07 s on a formula simplification. DAG size of input: 1089 DAG size of output: 161 [2020-09-04 16:47:44,604 WARN L193 SmtUtils]: Spent 3.99 s on a formula simplification. DAG size of input: 1167 DAG size of output: 57 [2020-09-04 16:47:56,735 WARN L193 SmtUtils]: Spent 12.12 s on a formula simplification. DAG size of input: 2077 DAG size of output: 15 [2020-09-04 16:48:12,202 WARN L193 SmtUtils]: Spent 15.46 s on a formula simplification. DAG size of input: 1065 DAG size of output: 551