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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:47:51,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:47:51,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:47:51,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:47:51,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:47:51,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:47:51,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:47:51,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:47:51,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:47:51,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:47:51,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:47:51,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:47:51,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:47:51,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:47:51,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:47:51,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:47:51,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:47:51,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:47:51,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:47:51,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:47:51,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:47:51,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:47:51,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:47:51,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:47:51,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:47:51,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:47:51,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:47:51,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:47:51,712 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:47:51,732 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:47:51,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:47:51,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:47:51,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:47:51,735 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:47:51,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:47:51,735 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:47:51,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:47:51,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:47:51,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:47:51,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:47:51,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:47:51,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:47:51,737 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:47:51,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:47:51,738 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:47:51,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:47:51,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:47:51,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:47:51,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:47:51,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:47:51,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:47:51,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:47:51,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:47:51,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:47:51,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:47:51,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:47:51,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:47:51,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:47:52,035 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:47:52,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:47:52,060 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:47:52,061 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:47:52,062 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:47:52,063 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2019-10-14 21:47:52,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95848297a/5fec1a2b34994abd8ea221d5132f2072/FLAG72bed8c83 [2019-10-14 21:47:52,632 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:47:52,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2019-10-14 21:47:52,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95848297a/5fec1a2b34994abd8ea221d5132f2072/FLAG72bed8c83 [2019-10-14 21:47:52,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95848297a/5fec1a2b34994abd8ea221d5132f2072 [2019-10-14 21:47:52,962 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:47:52,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:47:52,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:52,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:47:52,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:47:52,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:52" (1/1) ... [2019-10-14 21:47:52,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11490b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:52, skipping insertion in model container [2019-10-14 21:47:52,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:52" (1/1) ... [2019-10-14 21:47:52,981 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:47:53,002 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:47:53,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:53,211 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:47:53,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:53,251 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:47:53,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53 WrapperNode [2019-10-14 21:47:53,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:53,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:47:53,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:47:53,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:47:53,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:47:53,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:47:53,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:47:53,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:47:53,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (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 [2019-10-14 21:47:53,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:47:53,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:47:53,451 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:47:53,451 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2019-10-14 21:47:53,451 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2019-10-14 21:47:53,451 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:47:53,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:47:53,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:47:53,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:47:53,452 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2019-10-14 21:47:53,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:47:53,452 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2019-10-14 21:47:53,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:47:53,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:47:53,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:47:53,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:47:53,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:47:53,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:47:53,851 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:47:53,851 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 21:47:53,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:53 BoogieIcfgContainer [2019-10-14 21:47:53,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:47:53,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:47:53,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:47:53,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:47:53,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:47:52" (1/3) ... [2019-10-14 21:47:53,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a67c4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:53, skipping insertion in model container [2019-10-14 21:47:53,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (2/3) ... [2019-10-14 21:47:53,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a67c4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:53, skipping insertion in model container [2019-10-14 21:47:53,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:53" (3/3) ... [2019-10-14 21:47:53,861 INFO L109 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2019-10-14 21:47:53,870 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:47:53,877 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:47:53,889 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:47:53,913 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:47:53,913 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:47:53,914 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:47:53,914 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:47:53,914 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:47:53,914 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:47:53,914 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:47:53,914 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:47:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2019-10-14 21:47:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:47:53,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:53,937 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:53,939 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:53,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1521704262, now seen corresponding path program 1 times [2019-10-14 21:47:53,951 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:53,952 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043490251] [2019-10-14 21:47:53,952 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:53,952 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:53,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:54,126 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043490251] [2019-10-14 21:47:54,127 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:54,127 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:47:54,128 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691576888] [2019-10-14 21:47:54,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:47:54,133 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:54,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:47:54,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:47:54,151 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2019-10-14 21:47:54,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:54,339 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2019-10-14 21:47:54,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:47:54,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-14 21:47:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:54,356 INFO L225 Difference]: With dead ends: 90 [2019-10-14 21:47:54,356 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:47:54,362 INFO L600 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 [2019-10-14 21:47:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:47:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 21:47:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:47:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-10-14 21:47:54,415 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 18 [2019-10-14 21:47:54,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:54,415 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-10-14 21:47:54,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:47:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-10-14 21:47:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:47:54,418 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:54,418 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:54,418 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:54,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1816604960, now seen corresponding path program 1 times [2019-10-14 21:47:54,420 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:54,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33341236] [2019-10-14 21:47:54,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:54,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33341236] [2019-10-14 21:47:54,548 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:54,549 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:54,549 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564627456] [2019-10-14 21:47:54,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:54,551 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:54,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:54,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:54,554 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 4 states. [2019-10-14 21:47:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:54,705 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2019-10-14 21:47:54,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:54,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 21:47:54,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:54,707 INFO L225 Difference]: With dead ends: 61 [2019-10-14 21:47:54,707 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:47:54,709 INFO L600 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 [2019-10-14 21:47:54,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:47:54,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 21:47:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:47:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2019-10-14 21:47:54,719 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 18 [2019-10-14 21:47:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:54,720 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2019-10-14 21:47:54,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2019-10-14 21:47:54,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:47:54,722 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:54,722 INFO L380 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] [2019-10-14 21:47:54,722 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:54,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:54,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1871306430, now seen corresponding path program 1 times [2019-10-14 21:47:54,723 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:54,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172403735] [2019-10-14 21:47:54,724 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,724 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:54,861 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172403735] [2019-10-14 21:47:54,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181972218] [2019-10-14 21:47:54,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:47:54,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:47:54,980 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:54,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-10-14 21:47:54,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121243853] [2019-10-14 21:47:54,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:54,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:54,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:54,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:47:54,983 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 4 states. [2019-10-14 21:47:55,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:55,087 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2019-10-14 21:47:55,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:55,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-14 21:47:55,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:55,091 INFO L225 Difference]: With dead ends: 94 [2019-10-14 21:47:55,091 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 21:47:55,093 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:47:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 21:47:55,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-10-14 21:47:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:47:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-10-14 21:47:55,123 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 22 [2019-10-14 21:47:55,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:55,123 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-10-14 21:47:55,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-10-14 21:47:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:47:55,127 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:55,127 INFO L380 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] [2019-10-14 21:47:55,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:55,331 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:55,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:55,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1487912228, now seen corresponding path program 1 times [2019-10-14 21:47:55,332 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:55,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652997366] [2019-10-14 21:47:55,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:47:55,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652997366] [2019-10-14 21:47:55,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350760689] [2019-10-14 21:47:55,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:55,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:47:55,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:47:55,571 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:55,571 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-10-14 21:47:55,571 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036959577] [2019-10-14 21:47:55,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:47:55,572 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:55,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:47:55,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:47:55,576 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 8 states. [2019-10-14 21:47:55,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:55,944 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2019-10-14 21:47:55,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:47:55,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-10-14 21:47:55,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:55,947 INFO L225 Difference]: With dead ends: 130 [2019-10-14 21:47:55,948 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 21:47:55,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:55,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 21:47:55,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2019-10-14 21:47:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:47:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2019-10-14 21:47:55,970 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 24 [2019-10-14 21:47:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:55,970 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2019-10-14 21:47:55,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:47:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2019-10-14 21:47:55,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:47:55,972 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:55,973 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:56,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:56,183 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:56,183 INFO L82 PathProgramCache]: Analyzing trace with hash 200624820, now seen corresponding path program 2 times [2019-10-14 21:47:56,183 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:56,184 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113174064] [2019-10-14 21:47:56,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:47:56,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113174064] [2019-10-14 21:47:56,265 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:56,265 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:56,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853082803] [2019-10-14 21:47:56,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:56,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:56,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:56,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:56,267 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 4 states. [2019-10-14 21:47:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:56,384 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2019-10-14 21:47:56,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:56,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-14 21:47:56,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:56,387 INFO L225 Difference]: With dead ends: 76 [2019-10-14 21:47:56,387 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:47:56,388 INFO L600 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 [2019-10-14 21:47:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:47:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-14 21:47:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:47:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-10-14 21:47:56,409 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 29 [2019-10-14 21:47:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:56,410 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-10-14 21:47:56,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-10-14 21:47:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:47:56,412 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:56,412 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:47:56,412 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:56,413 INFO L82 PathProgramCache]: Analyzing trace with hash -810492430, now seen corresponding path program 1 times [2019-10-14 21:47:56,413 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:56,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578671628] [2019-10-14 21:47:56,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,414 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:47:56,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578671628] [2019-10-14 21:47:56,496 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:56,496 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:56,496 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783671310] [2019-10-14 21:47:56,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:47:56,497 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:56,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:47:56,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:47:56,498 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 5 states. [2019-10-14 21:47:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:56,681 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2019-10-14 21:47:56,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:47:56,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-10-14 21:47:56,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:56,683 INFO L225 Difference]: With dead ends: 92 [2019-10-14 21:47:56,683 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:47:56,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:47:56,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:47:56,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2019-10-14 21:47:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:47:56,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2019-10-14 21:47:56,692 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 29 [2019-10-14 21:47:56,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:56,692 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2019-10-14 21:47:56,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:47:56,693 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2019-10-14 21:47:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:47:56,694 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:56,694 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:56,694 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:56,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1051127576, now seen corresponding path program 1 times [2019-10-14 21:47:56,695 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:56,695 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426553188] [2019-10-14 21:47:56,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:47:56,793 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426553188] [2019-10-14 21:47:56,793 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:56,793 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:47:56,794 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559604712] [2019-10-14 21:47:56,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:47:56,795 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:56,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:47:56,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:47:56,796 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 5 states. [2019-10-14 21:47:56,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:56,926 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2019-10-14 21:47:56,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:47:56,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-10-14 21:47:56,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:56,928 INFO L225 Difference]: With dead ends: 107 [2019-10-14 21:47:56,928 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:47:56,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:47:56,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:47:56,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-10-14 21:47:56,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:47:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2019-10-14 21:47:56,945 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 39 [2019-10-14 21:47:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:56,945 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2019-10-14 21:47:56,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:47:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2019-10-14 21:47:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:47:56,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:56,949 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:56,949 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:56,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1308557857, now seen corresponding path program 1 times [2019-10-14 21:47:56,950 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:56,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832293063] [2019-10-14 21:47:56,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:47:57,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832293063] [2019-10-14 21:47:57,067 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:57,067 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:47:57,067 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112143331] [2019-10-14 21:47:57,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:47:57,068 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:57,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:47:57,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:47:57,069 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 6 states. [2019-10-14 21:47:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:57,238 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2019-10-14 21:47:57,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:47:57,239 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2019-10-14 21:47:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:57,242 INFO L225 Difference]: With dead ends: 120 [2019-10-14 21:47:57,242 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:47:57,243 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:47:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:47:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2019-10-14 21:47:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-14 21:47:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2019-10-14 21:47:57,252 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 39 [2019-10-14 21:47:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:57,252 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2019-10-14 21:47:57,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:47:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2019-10-14 21:47:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 21:47:57,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:57,255 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:57,255 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:57,256 INFO L82 PathProgramCache]: Analyzing trace with hash 998134748, now seen corresponding path program 1 times [2019-10-14 21:47:57,256 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:57,256 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786776021] [2019-10-14 21:47:57,256 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:57,256 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:57,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:47:57,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786776021] [2019-10-14 21:47:57,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642201714] [2019-10-14 21:47:57,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:47:57,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:47:57,512 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:57,512 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2019-10-14 21:47:57,512 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771275202] [2019-10-14 21:47:57,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:47:57,513 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:57,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:47:57,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:57,514 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 10 states. [2019-10-14 21:47:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:57,972 INFO L93 Difference]: Finished difference Result 163 states and 195 transitions. [2019-10-14 21:47:57,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:47:57,973 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2019-10-14 21:47:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:57,974 INFO L225 Difference]: With dead ends: 163 [2019-10-14 21:47:57,974 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 21:47:57,975 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:47:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 21:47:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2019-10-14 21:47:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 21:47:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2019-10-14 21:47:58,000 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 44 [2019-10-14 21:47:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:58,000 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2019-10-14 21:47:58,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:47:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2019-10-14 21:47:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:47:58,002 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:58,002 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:58,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:58,207 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:58,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:58,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2077043499, now seen corresponding path program 1 times [2019-10-14 21:47:58,208 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:58,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370260673] [2019-10-14 21:47:58,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:58,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:58,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:47:58,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370260673] [2019-10-14 21:47:58,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554481265] [2019-10-14 21:47:58,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:47:58,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:47:58,473 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:58,473 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-10-14 21:47:58,474 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165230417] [2019-10-14 21:47:58,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:47:58,474 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:58,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:47:58,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:47:58,475 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 13 states. [2019-10-14 21:47:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:58,916 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2019-10-14 21:47:58,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:47:58,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-10-14 21:47:58,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:58,919 INFO L225 Difference]: With dead ends: 173 [2019-10-14 21:47:58,919 INFO L226 Difference]: Without dead ends: 111 [2019-10-14 21:47:58,920 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:47:58,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-14 21:47:58,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 77. [2019-10-14 21:47:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:47:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2019-10-14 21:47:58,930 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 56 [2019-10-14 21:47:58,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:58,930 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2019-10-14 21:47:58,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:47:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2019-10-14 21:47:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 21:47:58,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:58,932 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:59,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:59,139 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:59,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:59,139 INFO L82 PathProgramCache]: Analyzing trace with hash -46575987, now seen corresponding path program 2 times [2019-10-14 21:47:59,139 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:59,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943011312] [2019-10-14 21:47:59,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:59,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:59,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:47:59,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943011312] [2019-10-14 21:47:59,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409317997] [2019-10-14 21:47:59,248 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:59,327 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:59,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:59,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:47:59,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:47:59,439 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:59,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2019-10-14 21:47:59,440 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105501715] [2019-10-14 21:47:59,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:47:59,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:59,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:47:59,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:47:59,441 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 15 states. [2019-10-14 21:47:59,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:59,832 INFO L93 Difference]: Finished difference Result 185 states and 216 transitions. [2019-10-14 21:47:59,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:47:59,832 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-10-14 21:47:59,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:59,835 INFO L225 Difference]: With dead ends: 185 [2019-10-14 21:47:59,835 INFO L226 Difference]: Without dead ends: 123 [2019-10-14 21:47:59,837 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:47:59,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-10-14 21:47:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 79. [2019-10-14 21:47:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 21:47:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2019-10-14 21:47:59,845 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 58 [2019-10-14 21:47:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:59,845 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2019-10-14 21:47:59,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:47:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2019-10-14 21:47:59,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 21:47:59,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:59,847 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:00,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:00,056 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:00,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:00,056 INFO L82 PathProgramCache]: Analyzing trace with hash -735436433, now seen corresponding path program 3 times [2019-10-14 21:48:00,057 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:00,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947997625] [2019-10-14 21:48:00,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:00,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:00,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:48:00,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947997625] [2019-10-14 21:48:00,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077184164] [2019-10-14 21:48:00,181 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:00,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:48:00,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:00,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:48:00,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 21:48:00,359 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:00,359 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 14 [2019-10-14 21:48:00,359 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406698860] [2019-10-14 21:48:00,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:48:00,362 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:00,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:48:00,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:48:00,362 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 14 states. [2019-10-14 21:48:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:01,067 INFO L93 Difference]: Finished difference Result 214 states and 258 transitions. [2019-10-14 21:48:01,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:48:01,068 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2019-10-14 21:48:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:01,070 INFO L225 Difference]: With dead ends: 214 [2019-10-14 21:48:01,070 INFO L226 Difference]: Without dead ends: 152 [2019-10-14 21:48:01,071 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:48:01,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-10-14 21:48:01,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2019-10-14 21:48:01,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 21:48:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2019-10-14 21:48:01,082 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 60 [2019-10-14 21:48:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:01,083 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2019-10-14 21:48:01,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:48:01,083 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2019-10-14 21:48:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-14 21:48:01,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:01,084 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:01,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:01,287 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:01,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1147184898, now seen corresponding path program 4 times [2019-10-14 21:48:01,288 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:01,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598435860] [2019-10-14 21:48:01,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-14 21:48:01,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598435860] [2019-10-14 21:48:01,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064839280] [2019-10-14 21:48:01,415 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:01,476 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:01,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:01,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:48:01,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:01,612 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-10-14 21:48:01,612 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:01,615 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:01,616 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:01,616 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2019-10-14 21:48:01,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-14 21:48:01,674 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:01,674 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2019-10-14 21:48:01,675 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965875168] [2019-10-14 21:48:01,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:48:01,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:01,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:48:01,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:48:01,676 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 17 states. [2019-10-14 21:48:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:02,664 INFO L93 Difference]: Finished difference Result 150 states and 183 transitions. [2019-10-14 21:48:02,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:48:02,664 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2019-10-14 21:48:02,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:02,666 INFO L225 Difference]: With dead ends: 150 [2019-10-14 21:48:02,666 INFO L226 Difference]: Without dead ends: 122 [2019-10-14 21:48:02,667 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:48:02,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-14 21:48:02,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 107. [2019-10-14 21:48:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-14 21:48:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2019-10-14 21:48:02,679 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 72 [2019-10-14 21:48:02,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:02,681 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2019-10-14 21:48:02,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:48:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2019-10-14 21:48:02,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 21:48:02,683 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:02,683 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:02,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:02,887 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:02,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1991284329, now seen corresponding path program 1 times [2019-10-14 21:48:02,888 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:02,889 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569402361] [2019-10-14 21:48:02,889 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:02,889 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:02,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-14 21:48:03,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569402361] [2019-10-14 21:48:03,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870117385] [2019-10-14 21:48:03,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:48:03,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 21:48:03,216 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:03,216 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2019-10-14 21:48:03,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628563186] [2019-10-14 21:48:03,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:48:03,217 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:03,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:48:03,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:48:03,218 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 16 states. [2019-10-14 21:48:03,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:03,938 INFO L93 Difference]: Finished difference Result 307 states and 378 transitions. [2019-10-14 21:48:03,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:48:03,938 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 83 [2019-10-14 21:48:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:03,941 INFO L225 Difference]: With dead ends: 307 [2019-10-14 21:48:03,941 INFO L226 Difference]: Without dead ends: 219 [2019-10-14 21:48:03,942 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:48:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-10-14 21:48:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 119. [2019-10-14 21:48:03,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-14 21:48:03,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2019-10-14 21:48:03,958 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 83 [2019-10-14 21:48:03,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:03,959 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2019-10-14 21:48:03,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:48:03,959 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2019-10-14 21:48:03,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 21:48:03,960 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:03,961 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:04,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:04,173 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:04,174 INFO L82 PathProgramCache]: Analyzing trace with hash -655094229, now seen corresponding path program 1 times [2019-10-14 21:48:04,174 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:04,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451726243] [2019-10-14 21:48:04,176 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:04,176 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:04,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-14 21:48:04,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451726243] [2019-10-14 21:48:04,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025458194] [2019-10-14 21:48:04,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:48:04,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:48:04,579 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:04,579 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2019-10-14 21:48:04,579 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114535821] [2019-10-14 21:48:04,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:48:04,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:04,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:48:04,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:48:04,581 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand 18 states. [2019-10-14 21:48:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:05,291 INFO L93 Difference]: Finished difference Result 310 states and 380 transitions. [2019-10-14 21:48:05,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:48:05,291 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 86 [2019-10-14 21:48:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:05,293 INFO L225 Difference]: With dead ends: 310 [2019-10-14 21:48:05,294 INFO L226 Difference]: Without dead ends: 212 [2019-10-14 21:48:05,295 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:48:05,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-10-14 21:48:05,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 130. [2019-10-14 21:48:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-14 21:48:05,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 157 transitions. [2019-10-14 21:48:05,311 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 157 transitions. Word has length 86 [2019-10-14 21:48:05,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:05,311 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 157 transitions. [2019-10-14 21:48:05,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:48:05,311 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 157 transitions. [2019-10-14 21:48:05,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 21:48:05,313 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:05,313 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:05,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:05,525 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:05,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1400710534, now seen corresponding path program 2 times [2019-10-14 21:48:05,526 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:05,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035502102] [2019-10-14 21:48:05,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:05,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:05,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-14 21:48:05,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035502102] [2019-10-14 21:48:05,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513394248] [2019-10-14 21:48:05,718 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:05,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:05,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:05,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:48:05,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-10-14 21:48:05,988 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:05,988 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2019-10-14 21:48:05,988 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378463312] [2019-10-14 21:48:05,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:48:05,989 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:05,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:48:05,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:48:05,990 INFO L87 Difference]: Start difference. First operand 130 states and 157 transitions. Second operand 20 states. [2019-10-14 21:48:06,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:06,780 INFO L93 Difference]: Finished difference Result 340 states and 422 transitions. [2019-10-14 21:48:06,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:48:06,780 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-14 21:48:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:06,782 INFO L225 Difference]: With dead ends: 340 [2019-10-14 21:48:06,783 INFO L226 Difference]: Without dead ends: 233 [2019-10-14 21:48:06,784 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:48:06,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-10-14 21:48:06,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 141. [2019-10-14 21:48:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-10-14 21:48:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 173 transitions. [2019-10-14 21:48:06,798 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 173 transitions. Word has length 98 [2019-10-14 21:48:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:06,798 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 173 transitions. [2019-10-14 21:48:06,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:48:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 173 transitions. [2019-10-14 21:48:06,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 21:48:06,800 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:06,801 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:07,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:07,005 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:07,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1323250423, now seen corresponding path program 3 times [2019-10-14 21:48:07,006 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:07,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583542418] [2019-10-14 21:48:07,007 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:07,007 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:07,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-10-14 21:48:07,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583542418] [2019-10-14 21:48:07,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966084689] [2019-10-14 21:48:07,197 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:07,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:48:07,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:07,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:48:07,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2019-10-14 21:48:07,348 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:07,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 19 [2019-10-14 21:48:07,349 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741425248] [2019-10-14 21:48:07,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:48:07,349 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:07,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:48:07,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:48:07,350 INFO L87 Difference]: Start difference. First operand 141 states and 173 transitions. Second operand 19 states. [2019-10-14 21:48:08,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:08,417 INFO L93 Difference]: Finished difference Result 418 states and 522 transitions. [2019-10-14 21:48:08,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:48:08,418 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 110 [2019-10-14 21:48:08,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:08,421 INFO L225 Difference]: With dead ends: 418 [2019-10-14 21:48:08,421 INFO L226 Difference]: Without dead ends: 302 [2019-10-14 21:48:08,422 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=455, Invalid=1185, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 21:48:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-10-14 21:48:08,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 150. [2019-10-14 21:48:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-10-14 21:48:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2019-10-14 21:48:08,438 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 110 [2019-10-14 21:48:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:08,438 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2019-10-14 21:48:08,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:48:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2019-10-14 21:48:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-14 21:48:08,440 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:08,440 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:08,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:08,647 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:08,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:08,648 INFO L82 PathProgramCache]: Analyzing trace with hash 2110925161, now seen corresponding path program 4 times [2019-10-14 21:48:08,648 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:08,649 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641194650] [2019-10-14 21:48:08,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:08,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:08,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2019-10-14 21:48:08,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641194650] [2019-10-14 21:48:08,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820484432] [2019-10-14 21:48:08,832 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:08,928 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:08,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:08,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:48:08,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:09,096 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:09,098 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:09,099 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:09,100 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:09,101 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2019-10-14 21:48:09,101 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:09,108 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:09,109 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:48:09,110 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-10-14 21:48:18,724 WARN L191 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 23 [2019-10-14 21:48:22,426 WARN L191 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 25 [2019-10-14 21:48:22,443 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:22,445 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:22,446 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:22,447 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:22,447 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 11 [2019-10-14 21:48:22,448 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:22,452 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:22,453 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:22,453 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:4 [2019-10-14 21:48:22,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-14 21:48:22,563 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:22,563 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2019-10-14 21:48:22,563 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493571894] [2019-10-14 21:48:22,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:48:22,564 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:22,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:48:22,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=638, Unknown=5, NotChecked=0, Total=756 [2019-10-14 21:48:22,565 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand 28 states.