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/array_shadowinit.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:47:46,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:47:46,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:47:46,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:47:46,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:47:46,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:47:46,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:47:46,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:47:46,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:47:46,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:47:46,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:47:46,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:47:46,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:47:46,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:47:46,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:47:46,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:47:46,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:47:46,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:47:46,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:47:46,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:47:46,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:47:46,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:47:46,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:47:46,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:47:46,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:47:46,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:47:46,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:47:46,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:47:46,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:47:46,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:47:46,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:47:46,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:47:46,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:47:46,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:47:46,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:47:46,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:47:46,731 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 21:47:46,746 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:47:46,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:47:46,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:47:46,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:47:46,748 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:47:46,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:47:46,748 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:47:46,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:47:46,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:47:46,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:47:46,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:47:46,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:47:46,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:47:46,750 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:47:46,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:47:46,750 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:47:46,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:47:46,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:47:46,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:47:46,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:47:46,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:47:46,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:47:46,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:47:46,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:47:46,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:47:46,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:47:46,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:47:46,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:47:46,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:47:47,055 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:47:47,065 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:47:47,074 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:47:47,075 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:47:47,076 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:47:47,076 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i [2019-10-14 21:47:47,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a20eb886/78f53a26668141a488443691b3400992/FLAGb2dc40dc5 [2019-10-14 21:47:47,631 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:47:47,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i [2019-10-14 21:47:47,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a20eb886/78f53a26668141a488443691b3400992/FLAGb2dc40dc5 [2019-10-14 21:47:47,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a20eb886/78f53a26668141a488443691b3400992 [2019-10-14 21:47:47,987 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:47:47,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:47:47,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:47,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:47:47,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:47:47,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:47" (1/1) ... [2019-10-14 21:47:47,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2089993a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:47, skipping insertion in model container [2019-10-14 21:47:47,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:47" (1/1) ... [2019-10-14 21:47:48,006 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:47:48,025 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:47:48,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:48,217 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:47:48,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:48,256 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:47:48,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48 WrapperNode [2019-10-14 21:47:48,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:48,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:47:48,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:47:48,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:47:48,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:47:48,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:47:48,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:47:48,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:47:48,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (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 21:47:48,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:47:48,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:47:48,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:47:48,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:47:48,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:47:48,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:47:48,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:47:48,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:47:48,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:47:48,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:47:48,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:47:48,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:47:48,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:47:48,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:47:48,673 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:47:48,673 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 21:47:48,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:48 BoogieIcfgContainer [2019-10-14 21:47:48,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:47:48,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:47:48,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:47:48,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:47:48,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:47:47" (1/3) ... [2019-10-14 21:47:48,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfc6f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:48, skipping insertion in model container [2019-10-14 21:47:48,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (2/3) ... [2019-10-14 21:47:48,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfc6f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:48, skipping insertion in model container [2019-10-14 21:47:48,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:48" (3/3) ... [2019-10-14 21:47:48,704 INFO L109 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2019-10-14 21:47:48,725 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:47:48,733 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:47:48,746 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:47:48,772 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:47:48,773 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:47:48,773 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:47:48,773 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:47:48,773 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:47:48,773 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:47:48,774 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:47:48,774 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:47:48,793 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-14 21:47:48,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:47:48,799 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:48,801 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:48,803 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:48,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1065998934, now seen corresponding path program 1 times [2019-10-14 21:47:48,818 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:48,818 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191639869] [2019-10-14 21:47:48,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:48,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:48,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,009 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 21:47:49,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191639869] [2019-10-14 21:47:49,010 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:49,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:47:49,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154768757] [2019-10-14 21:47:49,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:47:49,015 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:49,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:47:49,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:47:49,036 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-14 21:47:49,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:49,127 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2019-10-14 21:47:49,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:47:49,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-14 21:47:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:49,139 INFO L225 Difference]: With dead ends: 40 [2019-10-14 21:47:49,139 INFO L226 Difference]: Without dead ends: 18 [2019-10-14 21:47:49,143 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 21:47:49,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-14 21:47:49,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-14 21:47:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-14 21:47:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-14 21:47:49,187 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-10-14 21:47:49,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:49,188 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-14 21:47:49,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:47:49,189 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-14 21:47:49,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:47:49,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:49,190 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:49,190 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:49,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:49,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1810951506, now seen corresponding path program 1 times [2019-10-14 21:47:49,191 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:49,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348277803] [2019-10-14 21:47:49,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,343 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 21:47:49,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348277803] [2019-10-14 21:47:49,344 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:49,344 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:49,345 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36343705] [2019-10-14 21:47:49,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:49,353 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:49,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:49,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:49,354 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2019-10-14 21:47:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:49,441 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-10-14 21:47:49,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:49,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-14 21:47:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:49,444 INFO L225 Difference]: With dead ends: 29 [2019-10-14 21:47:49,444 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 21:47:49,446 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 21:47:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 21:47:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 21:47:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 21:47:49,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-14 21:47:49,457 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2019-10-14 21:47:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:49,458 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-14 21:47:49,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-14 21:47:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:47:49,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:49,462 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:49,462 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:49,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1816633037, now seen corresponding path program 1 times [2019-10-14 21:47:49,465 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:49,465 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913871509] [2019-10-14 21:47:49,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,466 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,798 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 21:47:49,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913871509] [2019-10-14 21:47:49,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440626697] [2019-10-14 21:47:49,799 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 21:47:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:47:49,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:49,953 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 21:47:49,954 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:49,968 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:49,969 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:49,969 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-10-14 21:47:50,007 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 19 treesize of output 7 [2019-10-14 21:47:50,008 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:50,015 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:50,016 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 21:47:50,016 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2019-10-14 21:47:50,055 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 21:47:50,059 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:50,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2019-10-14 21:47:50,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24038700] [2019-10-14 21:47:50,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:47:50,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:50,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:47:50,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:50,063 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 11 states. [2019-10-14 21:47:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:50,319 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2019-10-14 21:47:50,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:47:50,321 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-10-14 21:47:50,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:50,322 INFO L225 Difference]: With dead ends: 28 [2019-10-14 21:47:50,322 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:47:50,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:47:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:47:50,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-10-14 21:47:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 21:47:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-14 21:47:50,335 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2019-10-14 21:47:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:50,335 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-14 21:47:50,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:47:50,335 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-14 21:47:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:47:50,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:50,337 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:50,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:50,538 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:50,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1919305976, now seen corresponding path program 1 times [2019-10-14 21:47:50,539 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:50,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421844341] [2019-10-14 21:47:50,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:50,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:50,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:50,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421844341] [2019-10-14 21:47:50,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144255759] [2019-10-14 21:47:50,656 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 21:47:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:50,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:47:50,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:50,745 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:50,746 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2019-10-14 21:47:50,746 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120737458] [2019-10-14 21:47:50,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:47:50,747 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:50,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:47:50,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:50,748 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2019-10-14 21:47:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:50,926 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2019-10-14 21:47:50,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:47:50,926 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-10-14 21:47:50,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:50,929 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:47:50,930 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:47:50,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:50,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:47:50,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-10-14 21:47:50,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:47:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-14 21:47:50,942 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2019-10-14 21:47:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:50,942 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-14 21:47:50,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:47:50,942 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-14 21:47:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:47:50,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:50,943 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:51,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:51,148 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:51,149 INFO L82 PathProgramCache]: Analyzing trace with hash -248493095, now seen corresponding path program 2 times [2019-10-14 21:47:51,149 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:51,150 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571608081] [2019-10-14 21:47:51,150 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:51,150 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:51,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:51,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571608081] [2019-10-14 21:47:51,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427431471] [2019-10-14 21:47:51,353 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 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 21:47:51,394 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:51,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:51,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:47:51,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:51,447 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 21:47:51,448 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:51,454 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:51,454 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:51,455 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-14 21:47:51,694 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:47:51,697 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:51,698 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-14 21:47:51,698 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:51,709 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:51,710 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 21:47:51,710 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-14 21:47:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:51,777 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:51,778 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2019-10-14 21:47:51,778 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054852409] [2019-10-14 21:47:51,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:47:51,779 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:47:51,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:47:51,781 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 21 states. [2019-10-14 21:47:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:52,216 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-10-14 21:47:52,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:47:52,216 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2019-10-14 21:47:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:52,217 INFO L225 Difference]: With dead ends: 36 [2019-10-14 21:47:52,218 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:47:52,218 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:47:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:47:52,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-14 21:47:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:47:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-10-14 21:47:52,225 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 23 [2019-10-14 21:47:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:52,225 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-10-14 21:47:52,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:47:52,226 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-10-14 21:47:52,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:47:52,227 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:52,228 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:52,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:52,429 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:52,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:52,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2146027630, now seen corresponding path program 3 times [2019-10-14 21:47:52,431 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:52,432 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952749892] [2019-10-14 21:47:52,432 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:52,432 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:52,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:47:52,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952749892] [2019-10-14 21:47:52,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575785996] [2019-10-14 21:47:52,569 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 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 21:47:52,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:47:52,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:52,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:47:52,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:47:52,692 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:52,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:47:52,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706520230] [2019-10-14 21:47:52,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:47:52,693 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:52,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:47:52,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:52,694 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 14 states. [2019-10-14 21:47:52,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:52,951 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2019-10-14 21:47:52,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:47:52,952 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2019-10-14 21:47:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:52,953 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:47:52,953 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:47:52,954 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:47:52,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:47:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-10-14 21:47:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:47:52,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-10-14 21:47:52,962 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2019-10-14 21:47:52,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:52,962 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-10-14 21:47:52,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:47:52,963 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-10-14 21:47:52,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:47:52,963 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:52,964 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:53,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:53,176 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:53,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1843644787, now seen corresponding path program 4 times [2019-10-14 21:47:53,177 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:53,178 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606357586] [2019-10-14 21:47:53,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:53,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:53,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:47:53,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606357586] [2019-10-14 21:47:53,370 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329052152] [2019-10-14 21:47:53,370 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 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 21:47:53,428 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:53,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:53,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:47:53,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:53,531 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 21:47:53,532 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:53,537 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:53,537 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:53,537 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-14 21:47:53,720 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:47:53,721 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:53,722 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-14 21:47:53,722 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:53,725 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:53,726 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 21:47:53,726 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-14 21:47:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:47:53,800 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:53,800 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2019-10-14 21:47:53,801 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835351743] [2019-10-14 21:47:53,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:47:53,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:53,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:47:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:47:53,802 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 24 states. [2019-10-14 21:47:54,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:54,231 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2019-10-14 21:47:54,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:47:54,235 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-10-14 21:47:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:54,236 INFO L225 Difference]: With dead ends: 44 [2019-10-14 21:47:54,236 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:47:54,237 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:47:54,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:47:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:47:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:47:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-10-14 21:47:54,244 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 31 [2019-10-14 21:47:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:54,245 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-10-14 21:47:54,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:47:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-10-14 21:47:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:47:54,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:54,246 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:54,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:54,450 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:54,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1415649464, now seen corresponding path program 5 times [2019-10-14 21:47:54,452 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:54,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569374363] [2019-10-14 21:47:54,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:47:54,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569374363] [2019-10-14 21:47:54,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519875511] [2019-10-14 21:47:54,577 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 21:47:54,630 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:47:54,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:54,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:47:54,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:47:54,738 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:54,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-14 21:47:54,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110701819] [2019-10-14 21:47:54,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:47:54,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:54,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:47:54,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:47:54,740 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2019-10-14 21:47:55,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:55,005 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2019-10-14 21:47:55,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:47:55,006 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2019-10-14 21:47:55,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:55,007 INFO L225 Difference]: With dead ends: 78 [2019-10-14 21:47:55,007 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:47:55,009 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:47:55,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:47:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-10-14 21:47:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:47:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-10-14 21:47:55,018 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2019-10-14 21:47:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:55,018 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-10-14 21:47:55,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:47:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-10-14 21:47:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:47:55,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:55,020 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:55,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:55,224 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:55,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:55,224 INFO L82 PathProgramCache]: Analyzing trace with hash 942881177, now seen corresponding path program 6 times [2019-10-14 21:47:55,225 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:55,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907723034] [2019-10-14 21:47:55,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:47:55,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907723034] [2019-10-14 21:47:55,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157088927] [2019-10-14 21:47:55,511 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 21:47:55,564 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:47:55,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:55,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 21:47:55,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:55,596 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-14 21:47:55,596 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:55,602 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:55,604 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 21:47:55,604 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-10-14 21:47:55,892 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:55,892 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2019-10-14 21:47:55,893 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-14 21:47:55,901 INFO L567 ElimStorePlain]: treesize reduction 11, result has 38.9 percent of original size [2019-10-14 21:47:55,901 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 21:47:55,902 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:7 [2019-10-14 21:47:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:47:55,968 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:55,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 24 [2019-10-14 21:47:55,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919886172] [2019-10-14 21:47:55,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:47:55,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:55,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:47:55,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:47:55,971 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2019-10-14 21:47:56,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:56,701 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2019-10-14 21:47:56,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:47:56,702 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 39 [2019-10-14 21:47:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:56,704 INFO L225 Difference]: With dead ends: 52 [2019-10-14 21:47:56,704 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:47:56,706 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:47:56,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:47:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-10-14 21:47:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:47:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2019-10-14 21:47:56,714 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 39 [2019-10-14 21:47:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:56,714 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2019-10-14 21:47:56,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:47:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2019-10-14 21:47:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:47:56,716 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:56,716 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:56,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:56,920 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:56,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:56,920 INFO L82 PathProgramCache]: Analyzing trace with hash 306205138, now seen corresponding path program 7 times [2019-10-14 21:47:56,920 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:56,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572608346] [2019-10-14 21:47:56,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:47:57,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572608346] [2019-10-14 21:47:57,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707427647] [2019-10-14 21:47:57,078 INFO L92 rtionOrderModulation]: Changing assertion order to 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 21:47:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:47:57,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:47:57,234 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:57,234 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2019-10-14 21:47:57,235 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28155041] [2019-10-14 21:47:57,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:47:57,235 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:57,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:47:57,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:47:57,236 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 20 states. [2019-10-14 21:47:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:57,562 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2019-10-14 21:47:57,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:47:57,563 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2019-10-14 21:47:57,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:57,564 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:47:57,565 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:47:57,566 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:47:57,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:47:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-10-14 21:47:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:47:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-10-14 21:47:57,574 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2019-10-14 21:47:57,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:57,575 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-10-14 21:47:57,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:47:57,575 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-10-14 21:47:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:47:57,576 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:57,576 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:57,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:57,780 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash -501743181, now seen corresponding path program 8 times [2019-10-14 21:47:57,781 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:57,782 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684635652] [2019-10-14 21:47:57,782 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:57,782 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:57,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:47:58,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684635652] [2019-10-14 21:47:58,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587065371] [2019-10-14 21:47:58,105 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 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 21:47:58,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:58,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:58,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-14 21:47:58,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:58,312 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 21:47:58,313 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:58,317 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:58,318 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:58,318 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-14 21:47:59,031 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:47:59,034 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:59,034 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-14 21:47:59,035 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:59,040 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:59,041 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 21:47:59,041 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-14 21:47:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:47:59,142 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:59,142 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2019-10-14 21:47:59,142 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728100224] [2019-10-14 21:47:59,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 21:47:59,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:59,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 21:47:59,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:47:59,145 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 34 states. [2019-10-14 21:48:00,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:00,004 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-10-14 21:48:00,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:48:00,004 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 47 [2019-10-14 21:48:00,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:00,005 INFO L225 Difference]: With dead ends: 60 [2019-10-14 21:48:00,005 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:48:00,007 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2019-10-14 21:48:00,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:48:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-14 21:48:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:48:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-10-14 21:48:00,022 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 47 [2019-10-14 21:48:00,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:00,022 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-10-14 21:48:00,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 21:48:00,023 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-10-14 21:48:00,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:48:00,024 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:00,024 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:00,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:00,225 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:00,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1211557768, now seen corresponding path program 9 times [2019-10-14 21:48:00,226 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:00,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727148451] [2019-10-14 21:48:00,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:00,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:00,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:48:00,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727148451] [2019-10-14 21:48:00,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517495593] [2019-10-14 21:48:00,393 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 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 21:48:00,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:48:00,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:00,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:48:00,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:48:00,591 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:00,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2019-10-14 21:48:00,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320491941] [2019-10-14 21:48:00,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:48:00,593 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:00,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:48:00,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:48:00,594 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 23 states. [2019-10-14 21:48:00,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:00,923 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2019-10-14 21:48:00,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:48:00,923 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2019-10-14 21:48:00,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:00,924 INFO L225 Difference]: With dead ends: 108 [2019-10-14 21:48:00,925 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:48:00,926 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:48:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:48:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-10-14 21:48:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:48:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2019-10-14 21:48:00,934 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 54 [2019-10-14 21:48:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:00,934 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2019-10-14 21:48:00,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:48:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2019-10-14 21:48:00,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 21:48:00,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:00,936 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:01,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:01,141 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash -660121767, now seen corresponding path program 10 times [2019-10-14 21:48:01,141 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:01,142 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418641300] [2019-10-14 21:48:01,142 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,142 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:48:01,448 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418641300] [2019-10-14 21:48:01,448 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835166441] [2019-10-14 21:48:01,448 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 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 21:48:01,533 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:01,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:01,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 21:48:01,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:01,696 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 21:48:01,696 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:01,699 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:01,700 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:01,700 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-14 21:48:02,252 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:48:02,253 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:02,254 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-14 21:48:02,254 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:02,257 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:02,258 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 21:48:02,258 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-14 21:48:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:48:02,342 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:02,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2019-10-14 21:48:02,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130826347] [2019-10-14 21:48:02,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:48:02,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:02,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:48:02,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:48:02,344 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 36 states. [2019-10-14 21:48:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:03,236 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2019-10-14 21:48:03,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:48:03,237 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 55 [2019-10-14 21:48:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:03,238 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:48:03,238 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:48:03,239 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=142, Invalid=1498, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 21:48:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:48:03,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-10-14 21:48:03,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:48:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-10-14 21:48:03,248 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 55 [2019-10-14 21:48:03,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:03,249 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-10-14 21:48:03,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:48:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-10-14 21:48:03,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 21:48:03,250 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:03,250 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:03,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:03,454 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:03,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:03,454 INFO L82 PathProgramCache]: Analyzing trace with hash 843267090, now seen corresponding path program 11 times [2019-10-14 21:48:03,455 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:03,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252664923] [2019-10-14 21:48:03,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:03,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:03,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:48:03,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252664923] [2019-10-14 21:48:03,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775789531] [2019-10-14 21:48:03,634 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 21:48:03,699 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 21:48:03,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:03,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:48:03,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:48:03,865 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:03,865 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 26 [2019-10-14 21:48:03,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719767006] [2019-10-14 21:48:03,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:48:03,866 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:03,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:48:03,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:48:03,867 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 26 states. [2019-10-14 21:48:04,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:04,293 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2019-10-14 21:48:04,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:48:04,293 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2019-10-14 21:48:04,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:04,295 INFO L225 Difference]: With dead ends: 123 [2019-10-14 21:48:04,295 INFO L226 Difference]: Without dead ends: 70 [2019-10-14 21:48:04,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:48:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-14 21:48:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2019-10-14 21:48:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 21:48:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2019-10-14 21:48:04,306 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2019-10-14 21:48:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:04,306 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2019-10-14 21:48:04,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:48:04,307 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2019-10-14 21:48:04,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:48:04,308 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:04,308 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:04,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:04,514 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2015955443, now seen corresponding path program 12 times [2019-10-14 21:48:04,514 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:04,515 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8003717] [2019-10-14 21:48:04,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:04,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:04,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:48:04,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8003717] [2019-10-14 21:48:04,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463690523] [2019-10-14 21:48:04,844 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:04,923 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:48:04,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:04,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2019-10-14 21:48:04,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:04,944 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2019-10-14 21:48:04,945 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:04,955 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:04,956 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:04,956 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-10-14 21:48:05,015 INFO L341 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-10-14 21:48:05,015 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2019-10-14 21:48:05,016 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:05,028 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:05,029 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 21:48:05,029 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:32 [2019-10-14 21:48:06,204 INFO L341 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-10-14 21:48:06,205 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2019-10-14 21:48:06,205 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:06,223 INFO L567 ElimStorePlain]: treesize reduction 32, result has 28.9 percent of original size [2019-10-14 21:48:06,223 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:06,224 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:10 [2019-10-14 21:48:06,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 15 proven. 97 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-14 21:48:06,346 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:06,346 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 37 [2019-10-14 21:48:06,346 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873251288] [2019-10-14 21:48:06,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 21:48:06,347 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:06,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 21:48:06,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:48:06,348 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 37 states. [2019-10-14 21:48:07,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:07,742 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2019-10-14 21:48:07,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:48:07,742 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 63 [2019-10-14 21:48:07,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:07,743 INFO L225 Difference]: With dead ends: 76 [2019-10-14 21:48:07,743 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:48:07,745 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 52 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2019-10-14 21:48:07,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:48:07,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 21:48:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 21:48:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2019-10-14 21:48:07,756 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 63 [2019-10-14 21:48:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:07,757 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2019-10-14 21:48:07,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 21:48:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2019-10-14 21:48:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 21:48:07,758 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:07,758 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:07,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:07,972 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:07,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:07,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1581926456, now seen corresponding path program 13 times [2019-10-14 21:48:07,973 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:07,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624552080] [2019-10-14 21:48:07,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:07,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:07,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-14 21:48:08,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624552080] [2019-10-14 21:48:08,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677428911] [2019-10-14 21:48:08,164 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:48:08,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-14 21:48:08,417 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:08,417 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 29 [2019-10-14 21:48:08,417 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181702482] [2019-10-14 21:48:08,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 21:48:08,417 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:08,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 21:48:08,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:48:08,418 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 29 states. [2019-10-14 21:48:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:08,886 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2019-10-14 21:48:08,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:48:08,887 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2019-10-14 21:48:08,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:08,889 INFO L225 Difference]: With dead ends: 138 [2019-10-14 21:48:08,889 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 21:48:08,890 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:48:08,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 21:48:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2019-10-14 21:48:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 21:48:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2019-10-14 21:48:08,898 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 70 [2019-10-14 21:48:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:08,899 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2019-10-14 21:48:08,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 21:48:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2019-10-14 21:48:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:48:08,900 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:08,900 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:09,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:09,115 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:09,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:09,115 INFO L82 PathProgramCache]: Analyzing trace with hash 205038873, now seen corresponding path program 14 times [2019-10-14 21:48:09,115 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:09,116 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515749919] [2019-10-14 21:48:09,116 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:09,116 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:09,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-14 21:48:09,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515749919] [2019-10-14 21:48:09,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537475313] [2019-10-14 21:48:09,571 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:09,641 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:09,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:09,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-14 21:48:09,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:09,882 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 21:48:09,882 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:09,887 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:09,887 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:09,887 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-14 21:48:10,886 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:48:10,887 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:10,888 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-14 21:48:10,888 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:10,891 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:10,891 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 21:48:10,891 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-14 21:48:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 21:48:11,009 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:11,009 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2019-10-14 21:48:11,009 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513394248] [2019-10-14 21:48:11,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-10-14 21:48:11,010 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:11,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-10-14 21:48:11,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2019-10-14 21:48:11,011 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 46 states. [2019-10-14 21:48:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:12,479 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2019-10-14 21:48:12,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 21:48:12,479 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 71 [2019-10-14 21:48:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:12,481 INFO L225 Difference]: With dead ends: 84 [2019-10-14 21:48:12,481 INFO L226 Difference]: Without dead ends: 82 [2019-10-14 21:48:12,483 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 13 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=259, Invalid=3281, Unknown=0, NotChecked=0, Total=3540 [2019-10-14 21:48:12,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-14 21:48:12,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-10-14 21:48:12,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-14 21:48:12,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2019-10-14 21:48:12,493 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 71 [2019-10-14 21:48:12,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:12,493 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2019-10-14 21:48:12,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-10-14 21:48:12,494 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2019-10-14 21:48:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:48:12,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:12,495 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:12,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:12,698 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:12,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:12,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1393363374, now seen corresponding path program 15 times [2019-10-14 21:48:12,699 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:12,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894522950] [2019-10-14 21:48:12,700 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:12,700 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:12,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 21:48:12,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894522950] [2019-10-14 21:48:12,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487309331] [2019-10-14 21:48:12,954 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:13,095 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:48:13,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:13,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:48:13,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 21:48:13,274 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:13,274 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 32 [2019-10-14 21:48:13,274 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92217233] [2019-10-14 21:48:13,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:48:13,275 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:13,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:48:13,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:48:13,275 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 32 states. [2019-10-14 21:48:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:13,846 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2019-10-14 21:48:13,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:48:13,847 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2019-10-14 21:48:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:13,848 INFO L225 Difference]: With dead ends: 153 [2019-10-14 21:48:13,848 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 21:48:13,849 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=384, Invalid=1338, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:48:13,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 21:48:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2019-10-14 21:48:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-14 21:48:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2019-10-14 21:48:13,859 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 78 [2019-10-14 21:48:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:13,859 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2019-10-14 21:48:13,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:48:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2019-10-14 21:48:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 21:48:13,860 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:13,860 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:14,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:14,065 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:14,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1961550387, now seen corresponding path program 16 times [2019-10-14 21:48:14,065 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:14,065 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411795163] [2019-10-14 21:48:14,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:14,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:14,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 21:48:14,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411795163] [2019-10-14 21:48:14,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721651863] [2019-10-14 21:48:14,669 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:14,737 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:14,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:14,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-14 21:48:14,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:14,791 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-10-14 21:48:14,791 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:14,796 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:14,796 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:14,796 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-10-14 21:48:15,744 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:48:15,747 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:15,748 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-14 21:48:15,748 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:15,751 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:15,751 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 21:48:15,751 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-14 21:48:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 21:48:15,865 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:15,865 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2019-10-14 21:48:15,865 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493571894] [2019-10-14 21:48:15,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 21:48:15,866 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:15,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 21:48:15,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:48:15,867 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 37 states. [2019-10-14 21:48:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:17,255 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2019-10-14 21:48:17,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:48:17,256 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 79 [2019-10-14 21:48:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:17,257 INFO L225 Difference]: With dead ends: 92 [2019-10-14 21:48:17,257 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:48:17,259 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 65 SyntacticMatches, 21 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:48:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:48:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-14 21:48:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 21:48:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2019-10-14 21:48:17,268 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 79 [2019-10-14 21:48:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:17,268 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2019-10-14 21:48:17,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 21:48:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2019-10-14 21:48:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 21:48:17,269 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:17,270 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:17,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:17,473 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:17,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:17,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1399805960, now seen corresponding path program 17 times [2019-10-14 21:48:17,474 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:17,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728648570] [2019-10-14 21:48:17,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:17,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:17,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:48:17,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728648570] [2019-10-14 21:48:17,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926987093] [2019-10-14 21:48:17,797 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:17,961 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-14 21:48:17,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:17,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:48:17,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:48:18,357 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:18,357 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 35 [2019-10-14 21:48:18,357 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983652113] [2019-10-14 21:48:18,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 21:48:18,360 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:18,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 21:48:18,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=919, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:48:18,361 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 35 states. [2019-10-14 21:48:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:18,875 INFO L93 Difference]: Finished difference Result 168 states and 171 transitions. [2019-10-14 21:48:18,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:48:18,876 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2019-10-14 21:48:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:18,877 INFO L225 Difference]: With dead ends: 168 [2019-10-14 21:48:18,878 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 21:48:18,879 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=460, Invalid=1610, Unknown=0, NotChecked=0, Total=2070 [2019-10-14 21:48:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 21:48:18,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2019-10-14 21:48:18,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 21:48:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2019-10-14 21:48:18,887 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2019-10-14 21:48:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:18,887 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2019-10-14 21:48:18,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 21:48:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2019-10-14 21:48:18,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 21:48:18,888 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:18,888 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:19,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:19,092 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1349311783, now seen corresponding path program 18 times [2019-10-14 21:48:19,093 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:19,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399054811] [2019-10-14 21:48:19,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:19,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:19,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 18 proven. 181 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:48:19,544 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399054811] [2019-10-14 21:48:19,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129075498] [2019-10-14 21:48:19,545 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:19,666 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-14 21:48:19,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:19,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-14 21:48:19,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:19,949 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2019-10-14 21:48:19,950 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:19,957 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:19,957 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:19,958 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-10-14 21:48:20,002 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:20,003 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-10-14 21:48:20,003 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:20,010 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:20,010 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:20,011 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-10-14 21:48:22,062 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:48:22,064 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:22,065 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 13 [2019-10-14 21:48:22,065 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:22,070 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:22,070 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 21:48:22,070 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2019-10-14 21:48:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 24 proven. 199 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-10-14 21:48:22,351 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:22,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 55 [2019-10-14 21:48:22,352 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448632994] [2019-10-14 21:48:22,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-10-14 21:48:22,353 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:22,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-10-14 21:48:22,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2788, Unknown=0, NotChecked=0, Total=2970 [2019-10-14 21:48:22,355 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2019-10-14 21:48:24,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:24,791 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2019-10-14 21:48:24,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 21:48:24,791 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 87 [2019-10-14 21:48:24,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:24,793 INFO L225 Difference]: With dead ends: 100 [2019-10-14 21:48:24,793 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 21:48:24,795 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 65 SyntacticMatches, 17 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=321, Invalid=4509, Unknown=0, NotChecked=0, Total=4830 [2019-10-14 21:48:24,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 21:48:24,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-14 21:48:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 21:48:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2019-10-14 21:48:24,806 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 87 [2019-10-14 21:48:24,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:24,806 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2019-10-14 21:48:24,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-10-14 21:48:24,807 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2019-10-14 21:48:24,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 21:48:24,807 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:24,808 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:25,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:25,012 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:25,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:25,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1277395090, now seen corresponding path program 19 times [2019-10-14 21:48:25,013 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:25,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357349280] [2019-10-14 21:48:25,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:25,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:25,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 147 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 21:48:25,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357349280] [2019-10-14 21:48:25,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824221883] [2019-10-14 21:48:25,297 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:25,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:48:25,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 21:48:25,697 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:25,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 38 [2019-10-14 21:48:25,697 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379544419] [2019-10-14 21:48:25,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 21:48:25,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 21:48:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:48:25,700 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 38 states. [2019-10-14 21:48:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:26,272 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2019-10-14 21:48:26,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:48:26,275 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 94 [2019-10-14 21:48:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:26,276 INFO L225 Difference]: With dead ends: 183 [2019-10-14 21:48:26,276 INFO L226 Difference]: Without dead ends: 102 [2019-10-14 21:48:26,278 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=543, Invalid=1907, Unknown=0, NotChecked=0, Total=2450 [2019-10-14 21:48:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-14 21:48:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2019-10-14 21:48:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-14 21:48:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2019-10-14 21:48:26,289 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 94 [2019-10-14 21:48:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:26,289 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2019-10-14 21:48:26,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 21:48:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2019-10-14 21:48:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 21:48:26,290 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:26,290 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:26,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:26,494 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:26,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:26,495 INFO L82 PathProgramCache]: Analyzing trace with hash 439454323, now seen corresponding path program 20 times [2019-10-14 21:48:26,495 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:26,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588313884] [2019-10-14 21:48:26,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:26,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:26,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 21:48:27,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588313884] [2019-10-14 21:48:27,112 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131903271] [2019-10-14 21:48:27,112 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:27,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:27,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:27,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 60 conjunts are in the unsatisfiable core [2019-10-14 21:48:27,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:27,569 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 21:48:27,569 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:27,573 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:27,574 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:27,574 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-14 21:48:29,071 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:48:29,072 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:29,072 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-14 21:48:29,073 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:29,076 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:29,076 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 21:48:29,076 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2019-10-14 21:48:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 268 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-10-14 21:48:29,211 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:29,211 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 58 [2019-10-14 21:48:29,211 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132308098] [2019-10-14 21:48:29,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-14 21:48:29,212 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:29,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-14 21:48:29,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3129, Unknown=0, NotChecked=0, Total=3306 [2019-10-14 21:48:29,214 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 58 states.