/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/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:57:33,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:57:33,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:57:33,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:57:33,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:57:33,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:57:33,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:57:33,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:57:33,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:57:33,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:57:33,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:57:33,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:57:33,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:57:33,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:57:33,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:57:33,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:57:33,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:57:33,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:57:33,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:57:33,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:57:33,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:57:33,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:57:33,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:57:33,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:57:33,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:57:33,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:57:33,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:57:33,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:57:33,490 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:57:33,500 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:57:33,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:57:33,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:57:33,501 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:57:33,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:57:33,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:57:33,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:57:33,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:57:33,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:57:33,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:57:33,503 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:57:33,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:57:33,503 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:57:33,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:57:33,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:57:33,504 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:57:33,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:57:33,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:57:33,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:57:33,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:57:33,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:57:33,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:57:33,505 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:57:33,835 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:57:33,848 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:57:33,852 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:57:33,853 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:57:33,853 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:57:33,854 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-07-07 13:57:33,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbaf70023/d2993a1bd13c4f6187659463446d8b03/FLAG4b424e6af [2020-07-07 13:57:34,327 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:57:34,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-07-07 13:57:34,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbaf70023/d2993a1bd13c4f6187659463446d8b03/FLAG4b424e6af [2020-07-07 13:57:34,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbaf70023/d2993a1bd13c4f6187659463446d8b03 [2020-07-07 13:57:34,756 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:57:34,758 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:57:34,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:57:34,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:57:34,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:57:34,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:57:34" (1/1) ... [2020-07-07 13:57:34,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b51e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:34, skipping insertion in model container [2020-07-07 13:57:34,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:57:34" (1/1) ... [2020-07-07 13:57:34,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:57:34,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:57:34,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:57:35,005 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:57:35,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:57:35,139 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:57:35,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:35 WrapperNode [2020-07-07 13:57:35,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:57:35,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:57:35,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:57:35,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:57:35,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:35" (1/1) ... [2020-07-07 13:57:35,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:35" (1/1) ... [2020-07-07 13:57:35,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:35" (1/1) ... [2020-07-07 13:57:35,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:35" (1/1) ... [2020-07-07 13:57:35,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:35" (1/1) ... [2020-07-07 13:57:35,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:35" (1/1) ... [2020-07-07 13:57:35,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:35" (1/1) ... [2020-07-07 13:57:35,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:57:35,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:57:35,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:57:35,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:57:35,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-07 13:57:35,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:57:35,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:57:35,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:57:35,253 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-07-07 13:57:35,253 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-07-07 13:57:35,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:57:35,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:57:35,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:57:35,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:57:35,254 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-07-07 13:57:35,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:57:35,255 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-07-07 13:57:35,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:57:35,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:57:35,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:57:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:57:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:57:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:57:35,723 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:57:35,723 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-07-07 13:57:35,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:57:35 BoogieIcfgContainer [2020-07-07 13:57:35,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:57:35,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:57:35,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:57:35,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:57:35,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:57:34" (1/3) ... [2020-07-07 13:57:35,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a91a5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:57:35, skipping insertion in model container [2020-07-07 13:57:35,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:57:35" (2/3) ... [2020-07-07 13:57:35,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a91a5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:57:35, skipping insertion in model container [2020-07-07 13:57:35,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:57:35" (3/3) ... [2020-07-07 13:57:35,737 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-07-07 13:57:35,748 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:57:35,756 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:57:35,771 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:57:35,794 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:57:35,795 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:57:35,795 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:57:35,795 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:57:35,796 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:57:35,796 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:57:35,796 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:57:35,796 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:57:35,815 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states. [2020-07-07 13:57:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-07 13:57:35,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:35,831 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] [2020-07-07 13:57:35,831 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:35,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1588916751, now seen corresponding path program 1 times [2020-07-07 13:57:35,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:35,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958847437] [2020-07-07 13:57:35,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:57:36,048 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:57:36,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958847437] [2020-07-07 13:57:36,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:57:36,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:57:36,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359434628] [2020-07-07 13:57:36,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:57:36,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:57:36,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:57:36,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:57:36,078 INFO L87 Difference]: Start difference. First operand 132 states. Second operand 3 states. [2020-07-07 13:57:36,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:57:36,408 INFO L93 Difference]: Finished difference Result 245 states and 295 transitions. [2020-07-07 13:57:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:57:36,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-07 13:57:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:57:36,422 INFO L225 Difference]: With dead ends: 245 [2020-07-07 13:57:36,422 INFO L226 Difference]: Without dead ends: 123 [2020-07-07 13:57:36,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:57:36,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-07 13:57:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-07-07 13:57:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-07 13:57:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2020-07-07 13:57:36,496 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 23 [2020-07-07 13:57:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:57:36,497 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2020-07-07 13:57:36,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:57:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2020-07-07 13:57:36,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-07 13:57:36,499 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:36,499 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] [2020-07-07 13:57:36,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:57:36,500 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash -119454780, now seen corresponding path program 1 times [2020-07-07 13:57:36,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:36,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561281576] [2020-07-07 13:57:36,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:57:36,594 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:57:36,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561281576] [2020-07-07 13:57:36,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:57:36,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:57:36,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939527246] [2020-07-07 13:57:36,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:57:36,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:57:36,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:57:36,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:57:36,597 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 4 states. [2020-07-07 13:57:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:57:36,969 INFO L93 Difference]: Finished difference Result 303 states and 342 transitions. [2020-07-07 13:57:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:57:36,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-07-07 13:57:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:57:36,972 INFO L225 Difference]: With dead ends: 303 [2020-07-07 13:57:36,973 INFO L226 Difference]: Without dead ends: 199 [2020-07-07 13:57:36,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:57:36,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-07-07 13:57:36,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 124. [2020-07-07 13:57:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-07 13:57:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2020-07-07 13:57:36,998 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 23 [2020-07-07 13:57:36,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:57:36,999 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2020-07-07 13:57:36,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:57:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2020-07-07 13:57:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 13:57:37,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:37,001 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] [2020-07-07 13:57:37,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:57:37,001 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:37,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:37,002 INFO L82 PathProgramCache]: Analyzing trace with hash -395870253, now seen corresponding path program 1 times [2020-07-07 13:57:37,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:37,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884425558] [2020-07-07 13:57:37,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:57:37,124 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:57:37,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884425558] [2020-07-07 13:57:37,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:57:37,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:57:37,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657697987] [2020-07-07 13:57:37,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:57:37,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:57:37,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:57:37,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:57:37,127 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand 6 states. [2020-07-07 13:57:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:57:37,496 INFO L93 Difference]: Finished difference Result 310 states and 349 transitions. [2020-07-07 13:57:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:57:37,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-07 13:57:37,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:57:37,500 INFO L225 Difference]: With dead ends: 310 [2020-07-07 13:57:37,500 INFO L226 Difference]: Without dead ends: 206 [2020-07-07 13:57:37,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:57:37,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-07 13:57:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 131. [2020-07-07 13:57:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-07 13:57:37,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2020-07-07 13:57:37,519 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 30 [2020-07-07 13:57:37,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:57:37,520 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2020-07-07 13:57:37,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:57:37,520 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2020-07-07 13:57:37,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 13:57:37,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:37,522 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:57:37,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:57:37,522 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:37,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:37,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1926718692, now seen corresponding path program 2 times [2020-07-07 13:57:37,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:37,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569838704] [2020-07-07 13:57:37,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:57:37,625 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:57:37,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569838704] [2020-07-07 13:57:37,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:57:37,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:57:37,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472495191] [2020-07-07 13:57:37,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:57:37,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:57:37,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:57:37,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:57:37,628 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand 8 states. [2020-07-07 13:57:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:57:38,080 INFO L93 Difference]: Finished difference Result 317 states and 356 transitions. [2020-07-07 13:57:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 13:57:38,082 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-07-07 13:57:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:57:38,084 INFO L225 Difference]: With dead ends: 317 [2020-07-07 13:57:38,084 INFO L226 Difference]: Without dead ends: 213 [2020-07-07 13:57:38,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-07 13:57:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-07-07 13:57:38,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 138. [2020-07-07 13:57:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-07 13:57:38,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 151 transitions. [2020-07-07 13:57:38,125 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 151 transitions. Word has length 37 [2020-07-07 13:57:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:57:38,126 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 151 transitions. [2020-07-07 13:57:38,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:57:38,126 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 151 transitions. [2020-07-07 13:57:38,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-07 13:57:38,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:38,128 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:57:38,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:57:38,128 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:38,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:38,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1889524403, now seen corresponding path program 3 times [2020-07-07 13:57:38,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:38,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422274371] [2020-07-07 13:57:38,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:57:38,222 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:57:38,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422274371] [2020-07-07 13:57:38,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:57:38,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:57:38,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56645812] [2020-07-07 13:57:38,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:57:38,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:57:38,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:57:38,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:57:38,225 INFO L87 Difference]: Start difference. First operand 138 states and 151 transitions. Second operand 5 states. [2020-07-07 13:57:38,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:57:38,436 INFO L93 Difference]: Finished difference Result 248 states and 276 transitions. [2020-07-07 13:57:38,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:57:38,440 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-07-07 13:57:38,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:57:38,441 INFO L225 Difference]: With dead ends: 248 [2020-07-07 13:57:38,442 INFO L226 Difference]: Without dead ends: 143 [2020-07-07 13:57:38,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:57:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-07 13:57:38,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2020-07-07 13:57:38,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-07 13:57:38,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2020-07-07 13:57:38,456 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 149 transitions. Word has length 44 [2020-07-07 13:57:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:57:38,456 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 149 transitions. [2020-07-07 13:57:38,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:57:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 149 transitions. [2020-07-07 13:57:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-07 13:57:38,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:38,460 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:57:38,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:57:38,460 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:38,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1581132658, now seen corresponding path program 1 times [2020-07-07 13:57:38,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:38,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310325822] [2020-07-07 13:57:38,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:57:38,634 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:57:38,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310325822] [2020-07-07 13:57:38,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:57:38,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 13:57:38,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913256884] [2020-07-07 13:57:38,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 13:57:38,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:57:38,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 13:57:38,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-07 13:57:38,638 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. Second operand 11 states. [2020-07-07 13:57:39,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:57:39,219 INFO L93 Difference]: Finished difference Result 298 states and 331 transitions. [2020-07-07 13:57:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 13:57:39,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 80 [2020-07-07 13:57:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:57:39,221 INFO L225 Difference]: With dead ends: 298 [2020-07-07 13:57:39,221 INFO L226 Difference]: Without dead ends: 195 [2020-07-07 13:57:39,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-07-07 13:57:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-07 13:57:39,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 144. [2020-07-07 13:57:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-07 13:57:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2020-07-07 13:57:39,236 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 80 [2020-07-07 13:57:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:57:39,236 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2020-07-07 13:57:39,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 13:57:39,237 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2020-07-07 13:57:39,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-07 13:57:39,240 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:39,240 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:57:39,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:57:39,241 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2142538913, now seen corresponding path program 2 times [2020-07-07 13:57:39,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:39,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855456302] [2020-07-07 13:57:39,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:57:39,412 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:57:39,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855456302] [2020-07-07 13:57:39,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:57:39,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 13:57:39,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160651618] [2020-07-07 13:57:39,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 13:57:39,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:57:39,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 13:57:39,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-07-07 13:57:39,415 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand 13 states. [2020-07-07 13:57:39,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:57:39,934 INFO L93 Difference]: Finished difference Result 305 states and 338 transitions. [2020-07-07 13:57:39,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 13:57:39,934 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 87 [2020-07-07 13:57:39,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:57:39,936 INFO L225 Difference]: With dead ends: 305 [2020-07-07 13:57:39,936 INFO L226 Difference]: Without dead ends: 202 [2020-07-07 13:57:39,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2020-07-07 13:57:39,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-07 13:57:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 151. [2020-07-07 13:57:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-07-07 13:57:39,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 163 transitions. [2020-07-07 13:57:39,952 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 163 transitions. Word has length 87 [2020-07-07 13:57:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:57:39,953 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 163 transitions. [2020-07-07 13:57:39,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 13:57:39,954 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 163 transitions. [2020-07-07 13:57:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-07 13:57:39,956 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:39,956 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:57:39,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:57:39,956 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:39,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:39,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1372997778, now seen corresponding path program 3 times [2020-07-07 13:57:39,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:39,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954107114] [2020-07-07 13:57:39,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:57:40,169 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:57:40,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954107114] [2020-07-07 13:57:40,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:57:40,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 13:57:40,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856365501] [2020-07-07 13:57:40,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 13:57:40,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:57:40,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 13:57:40,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-07-07 13:57:40,172 INFO L87 Difference]: Start difference. First operand 151 states and 163 transitions. Second operand 15 states. [2020-07-07 13:57:40,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:57:40,858 INFO L93 Difference]: Finished difference Result 312 states and 345 transitions. [2020-07-07 13:57:40,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 13:57:40,859 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 94 [2020-07-07 13:57:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:57:40,861 INFO L225 Difference]: With dead ends: 312 [2020-07-07 13:57:40,861 INFO L226 Difference]: Without dead ends: 209 [2020-07-07 13:57:40,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-07-07 13:57:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-07-07 13:57:40,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 158. [2020-07-07 13:57:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-07 13:57:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 170 transitions. [2020-07-07 13:57:40,878 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 170 transitions. Word has length 94 [2020-07-07 13:57:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:57:40,878 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 170 transitions. [2020-07-07 13:57:40,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 13:57:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 170 transitions. [2020-07-07 13:57:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-07 13:57:40,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:40,881 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:57:40,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 13:57:40,882 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:40,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1331129217, now seen corresponding path program 4 times [2020-07-07 13:57:40,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:40,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178275811] [2020-07-07 13:57:40,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:57:41,113 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:57:41,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178275811] [2020-07-07 13:57:41,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:57:41,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-07 13:57:41,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038970794] [2020-07-07 13:57:41,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 13:57:41,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:57:41,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 13:57:41,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-07-07 13:57:41,116 INFO L87 Difference]: Start difference. First operand 158 states and 170 transitions. Second operand 17 states. [2020-07-07 13:57:41,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:57:41,826 INFO L93 Difference]: Finished difference Result 319 states and 352 transitions. [2020-07-07 13:57:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-07 13:57:41,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2020-07-07 13:57:41,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:57:41,828 INFO L225 Difference]: With dead ends: 319 [2020-07-07 13:57:41,828 INFO L226 Difference]: Without dead ends: 216 [2020-07-07 13:57:41,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=669, Unknown=0, NotChecked=0, Total=930 [2020-07-07 13:57:41,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-07 13:57:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 165. [2020-07-07 13:57:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-07-07 13:57:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 177 transitions. [2020-07-07 13:57:41,845 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 177 transitions. Word has length 101 [2020-07-07 13:57:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:57:41,849 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 177 transitions. [2020-07-07 13:57:41,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 13:57:41,849 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 177 transitions. [2020-07-07 13:57:41,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-07 13:57:41,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:41,850 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:57:41,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 13:57:41,851 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:41,851 INFO L82 PathProgramCache]: Analyzing trace with hash -837086642, now seen corresponding path program 5 times [2020-07-07 13:57:41,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:41,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38457276] [2020-07-07 13:57:41,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:57:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:57:41,971 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:57:41,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38457276] [2020-07-07 13:57:41,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:57:41,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:57:41,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952308422] [2020-07-07 13:57:41,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:57:41,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:57:41,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:57:41,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:57:41,973 INFO L87 Difference]: Start difference. First operand 165 states and 177 transitions. Second operand 5 states. [2020-07-07 13:57:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:57:42,211 INFO L93 Difference]: Finished difference Result 298 states and 327 transitions. [2020-07-07 13:57:42,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:57:42,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-07-07 13:57:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:57:42,214 INFO L225 Difference]: With dead ends: 298 [2020-07-07 13:57:42,214 INFO L226 Difference]: Without dead ends: 207 [2020-07-07 13:57:42,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:57:42,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-07-07 13:57:42,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 166. [2020-07-07 13:57:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-07 13:57:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 178 transitions. [2020-07-07 13:57:42,231 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 178 transitions. Word has length 108 [2020-07-07 13:57:42,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:57:42,231 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 178 transitions. [2020-07-07 13:57:42,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:57:42,232 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 178 transitions. [2020-07-07 13:57:42,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-07 13:57:42,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:57:42,233 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:57:42,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 13:57:42,234 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:57:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:57:42,234 INFO L82 PathProgramCache]: Analyzing trace with hash -118705538, now seen corresponding path program 1 times [2020-07-07 13:57:42,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:57:42,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260222850] [2020-07-07 13:57:42,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:57:42,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 13:57:42,241 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:57:42,247 INFO L168 Benchmark]: Toolchain (without parser) took 7488.37 ms. Allocated memory was 142.1 MB in the beginning and 327.7 MB in the end (delta: 185.6 MB). Free memory was 99.9 MB in the beginning and 279.8 MB in the end (delta: -179.9 MB). Peak memory consumption was 5.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:57:42,248 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 142.1 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-07 13:57:42,249 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.79 ms. Allocated memory was 142.1 MB in the beginning and 199.2 MB in the end (delta: 57.1 MB). Free memory was 99.7 MB in the beginning and 178.1 MB in the end (delta: -78.4 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:57:42,249 INFO L168 Benchmark]: Boogie Preprocessor took 47.57 ms. Allocated memory is still 199.2 MB. Free memory was 178.1 MB in the beginning and 175.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:57:42,250 INFO L168 Benchmark]: RCFGBuilder took 540.56 ms. Allocated memory is still 199.2 MB. Free memory was 175.4 MB in the beginning and 146.1 MB in the end (delta: 29.3 MB). Peak memory consumption was 29.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:57:42,251 INFO L168 Benchmark]: TraceAbstraction took 6514.31 ms. Allocated memory was 199.2 MB in the beginning and 327.7 MB in the end (delta: 128.5 MB). Free memory was 146.1 MB in the beginning and 279.8 MB in the end (delta: -133.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 13:57:42,254 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 142.1 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 380.79 ms. Allocated memory was 142.1 MB in the beginning and 199.2 MB in the end (delta: 57.1 MB). Free memory was 99.7 MB in the beginning and 178.1 MB in the end (delta: -78.4 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.57 ms. Allocated memory is still 199.2 MB. Free memory was 178.1 MB in the beginning and 175.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 540.56 ms. Allocated memory is still 199.2 MB. Free memory was 175.4 MB in the beginning and 146.1 MB in the end (delta: 29.3 MB). Peak memory consumption was 29.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6514.31 ms. Allocated memory was 199.2 MB in the beginning and 327.7 MB in the end (delta: 128.5 MB). Free memory was 146.1 MB in the beginning and 279.8 MB in the end (delta: -133.7 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...