/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:40:07,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:40:07,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:40:07,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:40:07,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:40:07,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:40:07,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:40:07,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:40:07,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:40:07,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:40:07,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:40:07,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:40:07,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:40:07,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:40:07,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:40:07,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:40:07,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:40:07,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:40:07,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:40:07,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:40:07,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:40:07,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:40:07,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:40:07,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:40:07,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:40:07,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:40:07,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:40:07,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:40:07,735 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:40:07,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:40:07,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:40:07,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:40:07,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:40:07,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:40:07,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:40:07,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:40:07,747 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 [2019-11-06 18:40:07,769 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:40:07,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:40:07,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:40:07,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:40:07,772 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:40:07,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:40:07,772 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:40:07,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:40:07,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:40:07,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:40:07,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:40:07,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:40:07,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:40:07,775 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:40:07,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:40:07,776 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:40:07,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:40:07,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:40:07,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:40:07,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:40:07,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:40:07,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:40:07,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:40:07,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:40:07,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:40:07,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:40:07,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:40:07,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:40:07,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:40:08,040 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:40:08,058 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:40:08,062 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:40:08,063 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:40:08,064 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:40:08,064 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2019-11-06 18:40:08,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c1cbb30b/f66e32879d86462084a01bacb8809499/FLAGc6f4d3b43 [2019-11-06 18:40:08,580 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:40:08,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2019-11-06 18:40:08,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c1cbb30b/f66e32879d86462084a01bacb8809499/FLAGc6f4d3b43 [2019-11-06 18:40:08,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c1cbb30b/f66e32879d86462084a01bacb8809499 [2019-11-06 18:40:08,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:40:08,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:40:08,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:40:08,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:40:08,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:40:08,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:40:08" (1/1) ... [2019-11-06 18:40:08,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1f1580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:08, skipping insertion in model container [2019-11-06 18:40:08,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:40:08" (1/1) ... [2019-11-06 18:40:08,996 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:40:09,013 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:40:09,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:40:09,185 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:40:09,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:40:09,315 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:40:09,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:09 WrapperNode [2019-11-06 18:40:09,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:40:09,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:40:09,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:40:09,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:40:09,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:09" (1/1) ... [2019-11-06 18:40:09,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:09" (1/1) ... [2019-11-06 18:40:09,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:09" (1/1) ... [2019-11-06 18:40:09,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:09" (1/1) ... [2019-11-06 18:40:09,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:09" (1/1) ... [2019-11-06 18:40:09,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:09" (1/1) ... [2019-11-06 18:40:09,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:09" (1/1) ... [2019-11-06 18:40:09,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:40:09,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:40:09,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:40:09,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:40:09,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:09" (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 [2019-11-06 18:40:09,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:40:09,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:40:09,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:40:09,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:40:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:40:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:40:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:40:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:40:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:40:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:40:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:40:09,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:40:09,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:40:09,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:40:09,772 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:40:09,772 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-06 18:40:09,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:40:09 BoogieIcfgContainer [2019-11-06 18:40:09,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:40:09,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:40:09,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:40:09,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:40:09,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:40:08" (1/3) ... [2019-11-06 18:40:09,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6712405f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:40:09, skipping insertion in model container [2019-11-06 18:40:09,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:09" (2/3) ... [2019-11-06 18:40:09,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6712405f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:40:09, skipping insertion in model container [2019-11-06 18:40:09,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:40:09" (3/3) ... [2019-11-06 18:40:09,781 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2019-11-06 18:40:09,792 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:40:09,799 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:40:09,811 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:40:09,837 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:40:09,838 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:40:09,838 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:40:09,838 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:40:09,838 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:40:09,838 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:40:09,838 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:40:09,839 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:40:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-11-06 18:40:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:40:09,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:09,866 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:09,868 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:09,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:09,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2019-11-06 18:40:09,880 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:09,880 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718641937] [2019-11-06 18:40:09,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:40:10,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718641937] [2019-11-06 18:40:10,045 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:40:10,045 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:40:10,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247277704] [2019-11-06 18:40:10,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:40:10,052 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:10,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:40:10,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:40:10,069 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-11-06 18:40:10,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:10,263 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2019-11-06 18:40:10,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:40:10,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-06 18:40:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:10,284 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:40:10,284 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:40:10,292 INFO L630 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 [2019-11-06 18:40:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:40:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-06 18:40:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:40:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2019-11-06 18:40:10,352 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2019-11-06 18:40:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:10,352 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2019-11-06 18:40:10,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:40:10,353 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2019-11-06 18:40:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:40:10,354 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:10,354 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:10,355 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:10,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2019-11-06 18:40:10,356 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:10,356 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116903198] [2019-11-06 18:40:10,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:40:10,428 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116903198] [2019-11-06 18:40:10,429 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:40:10,429 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:40:10,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703163898] [2019-11-06 18:40:10,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:40:10,433 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:10,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:40:10,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:40:10,434 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2019-11-06 18:40:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:10,602 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2019-11-06 18:40:10,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:40:10,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-06 18:40:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:10,604 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:40:10,605 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:40:10,607 INFO L630 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 [2019-11-06 18:40:10,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:40:10,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:40:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:40:10,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2019-11-06 18:40:10,627 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2019-11-06 18:40:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:10,627 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2019-11-06 18:40:10,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:40:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2019-11-06 18:40:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 18:40:10,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:10,630 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:10,630 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:10,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1609541534, now seen corresponding path program 1 times [2019-11-06 18:40:10,633 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:10,633 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414232629] [2019-11-06 18:40:10,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:40:10,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414232629] [2019-11-06 18:40:10,717 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:40:10,717 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:40:10,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326667592] [2019-11-06 18:40:10,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:40:10,718 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:10,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:40:10,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:40:10,720 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 4 states. [2019-11-06 18:40:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:10,904 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2019-11-06 18:40:10,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:40:10,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-06 18:40:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:10,906 INFO L225 Difference]: With dead ends: 72 [2019-11-06 18:40:10,906 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:40:10,907 INFO L630 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 [2019-11-06 18:40:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:40:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2019-11-06 18:40:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:40:10,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-11-06 18:40:10,917 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2019-11-06 18:40:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:10,917 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-11-06 18:40:10,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:40:10,918 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-11-06 18:40:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:40:10,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:10,919 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:10,919 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:10,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:10,920 INFO L82 PathProgramCache]: Analyzing trace with hash -898844059, now seen corresponding path program 1 times [2019-11-06 18:40:10,920 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:10,920 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010091796] [2019-11-06 18:40:10,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:40:10,986 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010091796] [2019-11-06 18:40:10,987 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:40:10,987 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:40:10,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912991138] [2019-11-06 18:40:10,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:40:10,989 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:10,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:40:10,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:40:10,990 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2019-11-06 18:40:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:11,116 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2019-11-06 18:40:11,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:40:11,116 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-11-06 18:40:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:11,117 INFO L225 Difference]: With dead ends: 90 [2019-11-06 18:40:11,117 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:40:11,118 INFO L630 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 [2019-11-06 18:40:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:40:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2019-11-06 18:40:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:40:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2019-11-06 18:40:11,126 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 20 [2019-11-06 18:40:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:11,127 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2019-11-06 18:40:11,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:40:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2019-11-06 18:40:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:40:11,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:11,128 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:11,128 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:11,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:11,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1708190685, now seen corresponding path program 1 times [2019-11-06 18:40:11,129 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:11,129 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439455071] [2019-11-06 18:40:11,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:40:11,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439455071] [2019-11-06 18:40:11,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805314146] [2019-11-06 18:40:11,207 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 [2019-11-06 18:40:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:11,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:40:11,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:40:11,325 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:11,325 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:40:11,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132412223] [2019-11-06 18:40:11,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:40:11,328 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:11,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:40:11,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:40:11,329 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 6 states. [2019-11-06 18:40:11,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:11,433 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2019-11-06 18:40:11,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:40:11,434 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-06 18:40:11,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:11,435 INFO L225 Difference]: With dead ends: 86 [2019-11-06 18:40:11,435 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 18:40:11,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:40:11,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 18:40:11,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-06 18:40:11,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:40:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2019-11-06 18:40:11,443 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 20 [2019-11-06 18:40:11,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:11,443 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2019-11-06 18:40:11,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:40:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2019-11-06 18:40:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:40:11,444 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:11,444 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:11,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:11,655 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:11,655 INFO L82 PathProgramCache]: Analyzing trace with hash 700215557, now seen corresponding path program 2 times [2019-11-06 18:40:11,656 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:11,656 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144546232] [2019-11-06 18:40:11,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:40:11,735 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144546232] [2019-11-06 18:40:11,735 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233761293] [2019-11-06 18:40:11,736 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 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 [2019-11-06 18:40:11,773 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 18:40:11,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:11,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:40:11,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:40:11,797 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:40:11,797 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-11-06 18:40:11,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288223555] [2019-11-06 18:40:11,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:40:11,798 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:11,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:40:11,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:40:11,799 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand 4 states. [2019-11-06 18:40:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:11,863 INFO L93 Difference]: Finished difference Result 108 states and 145 transitions. [2019-11-06 18:40:11,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:40:11,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-11-06 18:40:11,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:11,865 INFO L225 Difference]: With dead ends: 108 [2019-11-06 18:40:11,865 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 18:40:11,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:40:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 18:40:11,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2019-11-06 18:40:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:40:11,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2019-11-06 18:40:11,873 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 22 [2019-11-06 18:40:11,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:11,873 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2019-11-06 18:40:11,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:40:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2019-11-06 18:40:11,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:40:11,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:11,874 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:12,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:12,079 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:12,080 INFO L82 PathProgramCache]: Analyzing trace with hash -159559916, now seen corresponding path program 1 times [2019-11-06 18:40:12,080 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:12,080 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636729620] [2019-11-06 18:40:12,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:40:12,195 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636729620] [2019-11-06 18:40:12,195 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115802239] [2019-11-06 18:40:12,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:12,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:40:12,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:40:12,254 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:12,254 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:40:12,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36427277] [2019-11-06 18:40:12,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:40:12,255 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:12,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:40:12,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:40:12,256 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 7 states. [2019-11-06 18:40:12,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:12,381 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2019-11-06 18:40:12,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:40:12,382 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-06 18:40:12,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:12,383 INFO L225 Difference]: With dead ends: 90 [2019-11-06 18:40:12,383 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:40:12,385 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:40:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:40:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-06 18:40:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:40:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-11-06 18:40:12,396 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 25 [2019-11-06 18:40:12,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:12,401 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-11-06 18:40:12,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:40:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-11-06 18:40:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:40:12,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:12,402 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:12,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:12,605 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:12,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:12,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1768902798, now seen corresponding path program 2 times [2019-11-06 18:40:12,606 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:12,607 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057987098] [2019-11-06 18:40:12,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:40:12,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057987098] [2019-11-06 18:40:12,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843527222] [2019-11-06 18:40:12,694 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 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 [2019-11-06 18:40:12,738 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 18:40:12,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:12,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:40:12,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:40:12,767 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:40:12,767 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2019-11-06 18:40:12,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113536681] [2019-11-06 18:40:12,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:40:12,769 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:12,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:40:12,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:40:12,770 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 4 states. [2019-11-06 18:40:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:12,829 INFO L93 Difference]: Finished difference Result 102 states and 135 transitions. [2019-11-06 18:40:12,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:40:12,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-06 18:40:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:12,831 INFO L225 Difference]: With dead ends: 102 [2019-11-06 18:40:12,831 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 18:40:12,834 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:40:12,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 18:40:12,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2019-11-06 18:40:12,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:40:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2019-11-06 18:40:12,851 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 27 [2019-11-06 18:40:12,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:12,851 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2019-11-06 18:40:12,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:40:12,851 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2019-11-06 18:40:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:40:12,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:12,855 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:13,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:13,059 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:13,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:13,059 INFO L82 PathProgramCache]: Analyzing trace with hash -485006498, now seen corresponding path program 1 times [2019-11-06 18:40:13,059 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:13,060 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570010727] [2019-11-06 18:40:13,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:40:13,123 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570010727] [2019-11-06 18:40:13,124 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102808472] [2019-11-06 18:40:13,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:40:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:13,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:40:13,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:40:13,182 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:13,182 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:40:13,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261412345] [2019-11-06 18:40:13,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:40:13,183 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:13,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:40:13,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:40:13,183 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand 8 states. [2019-11-06 18:40:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:13,290 INFO L93 Difference]: Finished difference Result 112 states and 148 transitions. [2019-11-06 18:40:13,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:40:13,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-11-06 18:40:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:13,292 INFO L225 Difference]: With dead ends: 112 [2019-11-06 18:40:13,292 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 18:40:13,293 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:40:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 18:40:13,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-11-06 18:40:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-06 18:40:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2019-11-06 18:40:13,299 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 28 [2019-11-06 18:40:13,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:13,299 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2019-11-06 18:40:13,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:40:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2019-11-06 18:40:13,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:40:13,300 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:13,301 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:13,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:13,505 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:13,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:13,506 INFO L82 PathProgramCache]: Analyzing trace with hash 301121088, now seen corresponding path program 2 times [2019-11-06 18:40:13,506 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:13,506 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541565802] [2019-11-06 18:40:13,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:40:13,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541565802] [2019-11-06 18:40:13,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142235041] [2019-11-06 18:40:13,597 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 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 [2019-11-06 18:40:13,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 18:40:13,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:13,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:40:13,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:13,747 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:40:13,747 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 59 [2019-11-06 18:40:13,748 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:40:13,764 INFO L567 ElimStorePlain]: treesize reduction 24, result has 42.9 percent of original size [2019-11-06 18:40:13,765 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:40:13,765 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:7 [2019-11-06 18:40:13,789 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 15 treesize of output 7 [2019-11-06 18:40:13,790 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:40:13,792 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:40:13,792 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:40:13,792 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-06 18:40:13,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:40:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-06 18:40:13,832 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:40:13,832 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2019-11-06 18:40:13,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011349220] [2019-11-06 18:40:13,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:40:13,833 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:13,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:40:13,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:40:13,834 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand 8 states. [2019-11-06 18:40:13,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:13,964 INFO L93 Difference]: Finished difference Result 112 states and 146 transitions. [2019-11-06 18:40:13,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:40:13,964 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-06 18:40:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:13,965 INFO L225 Difference]: With dead ends: 112 [2019-11-06 18:40:13,966 INFO L226 Difference]: Without dead ends: 77 [2019-11-06 18:40:13,966 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:40:13,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-06 18:40:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2019-11-06 18:40:13,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-06 18:40:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2019-11-06 18:40:13,974 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 30 [2019-11-06 18:40:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:13,974 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2019-11-06 18:40:13,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:40:13,974 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2019-11-06 18:40:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:40:13,975 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:13,975 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:14,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:14,179 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:14,180 INFO L82 PathProgramCache]: Analyzing trace with hash 210042451, now seen corresponding path program 1 times [2019-11-06 18:40:14,180 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:14,181 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372788270] [2019-11-06 18:40:14,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:40:14,284 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372788270] [2019-11-06 18:40:14,284 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82189748] [2019-11-06 18:40:14,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:40:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:14,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:40:14,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:40:14,355 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:14,356 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:40:14,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213211854] [2019-11-06 18:40:14,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:40:14,357 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:14,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:40:14,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:40:14,357 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand 9 states. [2019-11-06 18:40:14,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:14,470 INFO L93 Difference]: Finished difference Result 128 states and 164 transitions. [2019-11-06 18:40:14,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:40:14,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-11-06 18:40:14,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:14,472 INFO L225 Difference]: With dead ends: 128 [2019-11-06 18:40:14,473 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 18:40:14,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:40:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 18:40:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-06 18:40:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-06 18:40:14,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2019-11-06 18:40:14,481 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 38 [2019-11-06 18:40:14,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:14,481 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2019-11-06 18:40:14,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:40:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2019-11-06 18:40:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:40:14,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:14,483 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:14,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:14,686 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:14,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2120066741, now seen corresponding path program 2 times [2019-11-06 18:40:14,687 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:14,688 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433945990] [2019-11-06 18:40:14,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:40:14,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433945990] [2019-11-06 18:40:14,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358840777] [2019-11-06 18:40:14,786 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 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 [2019-11-06 18:40:14,837 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:40:14,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:14,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:40:14,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:40:14,860 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:14,860 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:40:14,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704118065] [2019-11-06 18:40:14,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:40:14,861 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:14,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:40:14,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:40:14,862 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand 10 states. [2019-11-06 18:40:14,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:14,969 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2019-11-06 18:40:14,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:40:14,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-11-06 18:40:14,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:14,971 INFO L225 Difference]: With dead ends: 130 [2019-11-06 18:40:14,971 INFO L226 Difference]: Without dead ends: 75 [2019-11-06 18:40:14,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:40:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-06 18:40:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-11-06 18:40:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-06 18:40:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2019-11-06 18:40:14,978 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 40 [2019-11-06 18:40:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:14,978 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2019-11-06 18:40:14,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:40:14,978 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2019-11-06 18:40:14,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:40:14,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:14,980 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:15,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:15,184 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:15,184 INFO L82 PathProgramCache]: Analyzing trace with hash -592593257, now seen corresponding path program 3 times [2019-11-06 18:40:15,184 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:15,184 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41567436] [2019-11-06 18:40:15,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:40:15,272 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41567436] [2019-11-06 18:40:15,272 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384147529] [2019-11-06 18:40:15,272 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 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 [2019-11-06 18:40:15,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 18:40:15,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:15,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:40:15,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 18:40:15,364 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:15,364 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-11-06 18:40:15,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063483054] [2019-11-06 18:40:15,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:40:15,365 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:15,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:40:15,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:40:15,366 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand 13 states. [2019-11-06 18:40:15,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:15,658 INFO L93 Difference]: Finished difference Result 146 states and 189 transitions. [2019-11-06 18:40:15,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:40:15,658 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2019-11-06 18:40:15,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:15,660 INFO L225 Difference]: With dead ends: 146 [2019-11-06 18:40:15,660 INFO L226 Difference]: Without dead ends: 91 [2019-11-06 18:40:15,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:40:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-06 18:40:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2019-11-06 18:40:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-06 18:40:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2019-11-06 18:40:15,668 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 42 [2019-11-06 18:40:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:15,669 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2019-11-06 18:40:15,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:40:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2019-11-06 18:40:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:40:15,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:15,670 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:15,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:15,874 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:15,874 INFO L82 PathProgramCache]: Analyzing trace with hash 776355378, now seen corresponding path program 4 times [2019-11-06 18:40:15,875 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:15,875 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545832512] [2019-11-06 18:40:15,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:40:15,986 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545832512] [2019-11-06 18:40:15,987 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134834654] [2019-11-06 18:40:15,987 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 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 [2019-11-06 18:40:16,034 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:40:16,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:16,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:40:16,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:40:16,077 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:16,078 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:40:16,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216363297] [2019-11-06 18:40:16,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:40:16,079 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:16,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:40:16,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:40:16,079 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 12 states. [2019-11-06 18:40:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:16,220 INFO L93 Difference]: Finished difference Result 144 states and 182 transitions. [2019-11-06 18:40:16,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:40:16,220 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2019-11-06 18:40:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:16,221 INFO L225 Difference]: With dead ends: 144 [2019-11-06 18:40:16,222 INFO L226 Difference]: Without dead ends: 84 [2019-11-06 18:40:16,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:40:16,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-06 18:40:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2019-11-06 18:40:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 18:40:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2019-11-06 18:40:16,228 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 47 [2019-11-06 18:40:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:16,229 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2019-11-06 18:40:16,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:40:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2019-11-06 18:40:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 18:40:16,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:16,230 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:16,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:16,433 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:16,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:16,434 INFO L82 PathProgramCache]: Analyzing trace with hash 96986128, now seen corresponding path program 5 times [2019-11-06 18:40:16,435 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:16,435 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591012102] [2019-11-06 18:40:16,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:40:16,553 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591012102] [2019-11-06 18:40:16,553 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107822586] [2019-11-06 18:40:16,553 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 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 [2019-11-06 18:40:16,635 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-06 18:40:16,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:16,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:40:16,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:40:16,651 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:16,651 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:40:16,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329703529] [2019-11-06 18:40:16,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:40:16,652 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:16,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:40:16,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:40:16,653 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 13 states. [2019-11-06 18:40:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:16,754 INFO L93 Difference]: Finished difference Result 146 states and 184 transitions. [2019-11-06 18:40:16,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:40:16,754 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2019-11-06 18:40:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:16,756 INFO L225 Difference]: With dead ends: 146 [2019-11-06 18:40:16,756 INFO L226 Difference]: Without dead ends: 86 [2019-11-06 18:40:16,756 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:40:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-06 18:40:16,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-11-06 18:40:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-06 18:40:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2019-11-06 18:40:16,762 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 49 [2019-11-06 18:40:16,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:16,763 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2019-11-06 18:40:16,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:40:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2019-11-06 18:40:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:40:16,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:16,764 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:16,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:16,968 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:16,968 INFO L82 PathProgramCache]: Analyzing trace with hash 58165870, now seen corresponding path program 6 times [2019-11-06 18:40:16,969 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:16,969 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150562863] [2019-11-06 18:40:16,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:40:17,075 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150562863] [2019-11-06 18:40:17,076 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660087636] [2019-11-06 18:40:17,076 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 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 [2019-11-06 18:40:17,127 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-06 18:40:17,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:17,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:40:17,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-06 18:40:17,178 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:17,179 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-11-06 18:40:17,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210578404] [2019-11-06 18:40:17,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:40:17,179 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:17,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:40:17,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:40:17,180 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand 17 states. [2019-11-06 18:40:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:17,586 INFO L93 Difference]: Finished difference Result 163 states and 209 transitions. [2019-11-06 18:40:17,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:40:17,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2019-11-06 18:40:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:17,588 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:40:17,588 INFO L226 Difference]: Without dead ends: 103 [2019-11-06 18:40:17,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:40:17,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-06 18:40:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2019-11-06 18:40:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-06 18:40:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2019-11-06 18:40:17,605 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 51 [2019-11-06 18:40:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:17,606 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2019-11-06 18:40:17,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:40:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2019-11-06 18:40:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:40:17,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:17,607 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:17,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:17,811 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:17,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:17,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1263037951, now seen corresponding path program 7 times [2019-11-06 18:40:17,812 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:17,812 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294546181] [2019-11-06 18:40:17,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:40:17,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294546181] [2019-11-06 18:40:17,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386853870] [2019-11-06 18:40:17,965 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 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 [2019-11-06 18:40:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:18,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:40:18,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 18:40:18,060 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:18,061 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:40:18,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206522646] [2019-11-06 18:40:18,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:40:18,062 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:18,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:40:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:40:18,063 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 15 states. [2019-11-06 18:40:18,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:18,229 INFO L93 Difference]: Finished difference Result 162 states and 204 transitions. [2019-11-06 18:40:18,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:40:18,229 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2019-11-06 18:40:18,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:18,230 INFO L225 Difference]: With dead ends: 162 [2019-11-06 18:40:18,230 INFO L226 Difference]: Without dead ends: 96 [2019-11-06 18:40:18,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:40:18,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-06 18:40:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-11-06 18:40:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-06 18:40:18,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2019-11-06 18:40:18,238 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 56 [2019-11-06 18:40:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:18,239 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2019-11-06 18:40:18,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:40:18,239 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2019-11-06 18:40:18,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 18:40:18,240 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:18,240 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:18,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:18,444 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:18,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:18,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2105507359, now seen corresponding path program 8 times [2019-11-06 18:40:18,445 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:18,445 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645879056] [2019-11-06 18:40:18,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:40:18,616 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645879056] [2019-11-06 18:40:18,616 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355019967] [2019-11-06 18:40:18,616 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 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 [2019-11-06 18:40:18,682 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:40:18,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:18,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:40:18,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 18:40:18,699 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:18,700 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:40:18,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686518919] [2019-11-06 18:40:18,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:40:18,700 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:18,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:40:18,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:40:18,701 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 16 states. [2019-11-06 18:40:18,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:18,803 INFO L93 Difference]: Finished difference Result 164 states and 206 transitions. [2019-11-06 18:40:18,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:40:18,803 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2019-11-06 18:40:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:18,804 INFO L225 Difference]: With dead ends: 164 [2019-11-06 18:40:18,804 INFO L226 Difference]: Without dead ends: 98 [2019-11-06 18:40:18,805 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:40:18,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-06 18:40:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-06 18:40:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:40:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2019-11-06 18:40:18,817 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 58 [2019-11-06 18:40:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:18,817 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2019-11-06 18:40:18,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:40:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2019-11-06 18:40:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 18:40:18,818 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:18,818 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:19,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:19,023 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:19,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:19,024 INFO L82 PathProgramCache]: Analyzing trace with hash -872209085, now seen corresponding path program 9 times [2019-11-06 18:40:19,024 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:19,024 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329492241] [2019-11-06 18:40:19,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:40:19,183 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329492241] [2019-11-06 18:40:19,183 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371763308] [2019-11-06 18:40:19,184 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 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 [2019-11-06 18:40:19,237 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:40:19,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:19,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:40:19,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-11-06 18:40:19,307 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:19,307 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 21 [2019-11-06 18:40:19,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137798127] [2019-11-06 18:40:19,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:40:19,308 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:19,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:40:19,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:40:19,309 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand 21 states. [2019-11-06 18:40:19,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:19,837 INFO L93 Difference]: Finished difference Result 181 states and 231 transitions. [2019-11-06 18:40:19,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:40:19,838 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2019-11-06 18:40:19,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:19,839 INFO L225 Difference]: With dead ends: 181 [2019-11-06 18:40:19,839 INFO L226 Difference]: Without dead ends: 115 [2019-11-06 18:40:19,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=1047, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 18:40:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-06 18:40:19,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2019-11-06 18:40:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-06 18:40:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2019-11-06 18:40:19,846 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 60 [2019-11-06 18:40:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:19,847 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2019-11-06 18:40:19,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:40:19,847 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2019-11-06 18:40:19,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 18:40:19,848 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:19,848 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:20,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:20,052 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:20,053 INFO L82 PathProgramCache]: Analyzing trace with hash 26602630, now seen corresponding path program 10 times [2019-11-06 18:40:20,053 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:20,053 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997160278] [2019-11-06 18:40:20,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:40:20,218 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997160278] [2019-11-06 18:40:20,218 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141346700] [2019-11-06 18:40:20,218 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 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 [2019-11-06 18:40:20,288 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:40:20,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:20,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:40:20,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-06 18:40:20,309 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:20,310 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:40:20,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298406824] [2019-11-06 18:40:20,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:40:20,311 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:20,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:40:20,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:40:20,311 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 18 states. [2019-11-06 18:40:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:20,501 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2019-11-06 18:40:20,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:40:20,501 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2019-11-06 18:40:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:20,503 INFO L225 Difference]: With dead ends: 180 [2019-11-06 18:40:20,503 INFO L226 Difference]: Without dead ends: 108 [2019-11-06 18:40:20,504 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:40:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-06 18:40:20,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-06 18:40:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:40:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2019-11-06 18:40:20,508 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 65 [2019-11-06 18:40:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:20,509 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2019-11-06 18:40:20,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:40:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2019-11-06 18:40:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 18:40:20,510 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:20,510 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:20,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:20,718 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:20,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:20,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2053564700, now seen corresponding path program 11 times [2019-11-06 18:40:20,720 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:20,720 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43901959] [2019-11-06 18:40:20,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:40:20,884 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43901959] [2019-11-06 18:40:20,884 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135773349] [2019-11-06 18:40:20,884 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 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 [2019-11-06 18:40:21,038 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-11-06 18:40:21,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:21,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:40:21,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-06 18:40:21,057 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:21,057 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:40:21,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021106870] [2019-11-06 18:40:21,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:40:21,058 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:21,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:40:21,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:40:21,058 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand 19 states. [2019-11-06 18:40:21,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:21,177 INFO L93 Difference]: Finished difference Result 182 states and 228 transitions. [2019-11-06 18:40:21,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:40:21,178 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2019-11-06 18:40:21,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:21,179 INFO L225 Difference]: With dead ends: 182 [2019-11-06 18:40:21,179 INFO L226 Difference]: Without dead ends: 110 [2019-11-06 18:40:21,180 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:40:21,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-06 18:40:21,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-06 18:40:21,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 18:40:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2019-11-06 18:40:21,187 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 67 [2019-11-06 18:40:21,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:21,187 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2019-11-06 18:40:21,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:40:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2019-11-06 18:40:21,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 18:40:21,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:21,188 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:21,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:21,392 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:21,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:21,393 INFO L82 PathProgramCache]: Analyzing trace with hash 360391106, now seen corresponding path program 12 times [2019-11-06 18:40:21,393 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:21,393 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815327889] [2019-11-06 18:40:21,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:40:21,587 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815327889] [2019-11-06 18:40:21,587 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023330381] [2019-11-06 18:40:21,587 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 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 [2019-11-06 18:40:21,672 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 18:40:21,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:21,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:40:21,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2019-11-06 18:40:21,746 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:21,747 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-06 18:40:21,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138629452] [2019-11-06 18:40:21,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:40:21,747 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:21,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:40:21,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:40:21,748 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand 25 states. [2019-11-06 18:40:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:22,440 INFO L93 Difference]: Finished difference Result 199 states and 253 transitions. [2019-11-06 18:40:22,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-06 18:40:22,441 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2019-11-06 18:40:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:22,443 INFO L225 Difference]: With dead ends: 199 [2019-11-06 18:40:22,443 INFO L226 Difference]: Without dead ends: 127 [2019-11-06 18:40:22,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=521, Invalid=1549, Unknown=0, NotChecked=0, Total=2070 [2019-11-06 18:40:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-06 18:40:22,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2019-11-06 18:40:22,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-06 18:40:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 142 transitions. [2019-11-06 18:40:22,450 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 142 transitions. Word has length 69 [2019-11-06 18:40:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:22,450 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 142 transitions. [2019-11-06 18:40:22,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:40:22,451 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 142 transitions. [2019-11-06 18:40:22,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 18:40:22,451 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:22,452 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:22,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:22,656 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:22,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:22,656 INFO L82 PathProgramCache]: Analyzing trace with hash 390599083, now seen corresponding path program 13 times [2019-11-06 18:40:22,657 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:22,657 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715724412] [2019-11-06 18:40:22,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 18:40:22,852 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715724412] [2019-11-06 18:40:22,852 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136285103] [2019-11-06 18:40:22,852 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 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 [2019-11-06 18:40:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:22,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:40:22,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-06 18:40:22,944 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:22,945 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:40:22,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824355790] [2019-11-06 18:40:22,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:40:22,945 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:22,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:40:22,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:40:22,946 INFO L87 Difference]: Start difference. First operand 117 states and 142 transitions. Second operand 21 states. [2019-11-06 18:40:23,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:23,100 INFO L93 Difference]: Finished difference Result 198 states and 248 transitions. [2019-11-06 18:40:23,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:40:23,100 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 74 [2019-11-06 18:40:23,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:23,102 INFO L225 Difference]: With dead ends: 198 [2019-11-06 18:40:23,102 INFO L226 Difference]: Without dead ends: 120 [2019-11-06 18:40:23,102 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:40:23,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-06 18:40:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2019-11-06 18:40:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-06 18:40:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 144 transitions. [2019-11-06 18:40:23,108 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 144 transitions. Word has length 74 [2019-11-06 18:40:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:23,108 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 144 transitions. [2019-11-06 18:40:23,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:40:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 144 transitions. [2019-11-06 18:40:23,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:40:23,109 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:23,110 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:23,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:23,313 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:23,313 INFO L82 PathProgramCache]: Analyzing trace with hash 640397581, now seen corresponding path program 14 times [2019-11-06 18:40:23,313 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:23,314 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24282247] [2019-11-06 18:40:23,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 18:40:23,695 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24282247] [2019-11-06 18:40:23,695 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517278236] [2019-11-06 18:40:23,695 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 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 [2019-11-06 18:40:23,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:40:23,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:23,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 18:40:23,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-06 18:40:23,830 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:23,830 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-11-06 18:40:23,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804786272] [2019-11-06 18:40:23,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:40:23,832 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:23,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:40:23,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:40:23,833 INFO L87 Difference]: Start difference. First operand 119 states and 144 transitions. Second operand 22 states. [2019-11-06 18:40:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:23,963 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2019-11-06 18:40:23,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:40:23,965 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 76 [2019-11-06 18:40:23,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:23,967 INFO L225 Difference]: With dead ends: 200 [2019-11-06 18:40:23,967 INFO L226 Difference]: Without dead ends: 122 [2019-11-06 18:40:23,968 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:40:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-06 18:40:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2019-11-06 18:40:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-06 18:40:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 146 transitions. [2019-11-06 18:40:23,975 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 146 transitions. Word has length 76 [2019-11-06 18:40:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:23,975 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 146 transitions. [2019-11-06 18:40:23,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:40:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 146 transitions. [2019-11-06 18:40:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 18:40:23,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:23,977 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:24,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:24,180 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:24,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:24,181 INFO L82 PathProgramCache]: Analyzing trace with hash 178585583, now seen corresponding path program 15 times [2019-11-06 18:40:24,181 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:24,182 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395800391] [2019-11-06 18:40:24,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 18:40:24,414 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395800391] [2019-11-06 18:40:24,414 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573724757] [2019-11-06 18:40:24,414 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 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 [2019-11-06 18:40:24,480 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:40:24,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:24,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:40:24,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-11-06 18:40:24,564 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:24,564 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2019-11-06 18:40:24,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785697440] [2019-11-06 18:40:24,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-06 18:40:24,564 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:24,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-06 18:40:24,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2019-11-06 18:40:24,565 INFO L87 Difference]: Start difference. First operand 121 states and 146 transitions. Second operand 29 states. [2019-11-06 18:40:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:25,206 INFO L93 Difference]: Finished difference Result 217 states and 275 transitions. [2019-11-06 18:40:25,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:40:25,207 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 78 [2019-11-06 18:40:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:25,208 INFO L225 Difference]: With dead ends: 217 [2019-11-06 18:40:25,208 INFO L226 Difference]: Without dead ends: 139 [2019-11-06 18:40:25,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=713, Invalid=2149, Unknown=0, NotChecked=0, Total=2862 [2019-11-06 18:40:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-06 18:40:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2019-11-06 18:40:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-06 18:40:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2019-11-06 18:40:25,228 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 78 [2019-11-06 18:40:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:25,230 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2019-11-06 18:40:25,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-06 18:40:25,231 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2019-11-06 18:40:25,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-06 18:40:25,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:25,232 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:25,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:25,433 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:25,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:25,433 INFO L82 PathProgramCache]: Analyzing trace with hash 212109018, now seen corresponding path program 16 times [2019-11-06 18:40:25,433 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:25,433 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395823025] [2019-11-06 18:40:25,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-06 18:40:25,689 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395823025] [2019-11-06 18:40:25,690 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670741420] [2019-11-06 18:40:25,690 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:25,772 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:40:25,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:25,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:40:25,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 18:40:25,791 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:25,791 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 18:40:25,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475128796] [2019-11-06 18:40:25,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:40:25,791 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:40:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:40:25,792 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand 24 states. [2019-11-06 18:40:25,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:25,937 INFO L93 Difference]: Finished difference Result 216 states and 270 transitions. [2019-11-06 18:40:25,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:40:25,937 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 83 [2019-11-06 18:40:25,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:25,938 INFO L225 Difference]: With dead ends: 216 [2019-11-06 18:40:25,940 INFO L226 Difference]: Without dead ends: 132 [2019-11-06 18:40:25,941 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:40:25,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-06 18:40:25,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2019-11-06 18:40:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-06 18:40:25,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 158 transitions. [2019-11-06 18:40:25,951 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 158 transitions. Word has length 83 [2019-11-06 18:40:25,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:25,951 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 158 transitions. [2019-11-06 18:40:25,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:40:25,951 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 158 transitions. [2019-11-06 18:40:25,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-06 18:40:25,952 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:25,952 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:26,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:26,156 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:26,156 INFO L82 PathProgramCache]: Analyzing trace with hash 780211640, now seen corresponding path program 17 times [2019-11-06 18:40:26,156 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:26,156 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682412300] [2019-11-06 18:40:26,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-06 18:40:26,537 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682412300] [2019-11-06 18:40:26,537 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118052320] [2019-11-06 18:40:26,538 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:27,058 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-06 18:40:27,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:27,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:40:27,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 18:40:27,078 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:27,078 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:40:27,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754790766] [2019-11-06 18:40:27,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:40:27,078 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:27,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:40:27,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:40:27,079 INFO L87 Difference]: Start difference. First operand 131 states and 158 transitions. Second operand 25 states. [2019-11-06 18:40:27,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:27,241 INFO L93 Difference]: Finished difference Result 218 states and 272 transitions. [2019-11-06 18:40:27,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:40:27,242 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 85 [2019-11-06 18:40:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:27,244 INFO L225 Difference]: With dead ends: 218 [2019-11-06 18:40:27,244 INFO L226 Difference]: Without dead ends: 134 [2019-11-06 18:40:27,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:40:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-06 18:40:27,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-11-06 18:40:27,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-11-06 18:40:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2019-11-06 18:40:27,252 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 85 [2019-11-06 18:40:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:27,252 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2019-11-06 18:40:27,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:40:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2019-11-06 18:40:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-06 18:40:27,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:27,253 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:27,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:27,459 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:27,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1265984790, now seen corresponding path program 18 times [2019-11-06 18:40:27,460 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:27,460 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761447776] [2019-11-06 18:40:27,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-06 18:40:27,746 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761447776] [2019-11-06 18:40:27,746 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349940065] [2019-11-06 18:40:27,746 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:27,961 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:40:27,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:27,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:40:27,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2019-11-06 18:40:28,128 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:28,128 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2019-11-06 18:40:28,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705797483] [2019-11-06 18:40:28,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-06 18:40:28,130 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:28,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-06 18:40:28,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 18:40:28,131 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand 33 states. [2019-11-06 18:40:29,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:29,018 INFO L93 Difference]: Finished difference Result 235 states and 297 transitions. [2019-11-06 18:40:29,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-06 18:40:29,019 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 87 [2019-11-06 18:40:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:29,020 INFO L225 Difference]: With dead ends: 235 [2019-11-06 18:40:29,020 INFO L226 Difference]: Without dead ends: 151 [2019-11-06 18:40:29,022 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=935, Invalid=2847, Unknown=0, NotChecked=0, Total=3782 [2019-11-06 18:40:29,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-06 18:40:29,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2019-11-06 18:40:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-11-06 18:40:29,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 170 transitions. [2019-11-06 18:40:29,032 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 170 transitions. Word has length 87 [2019-11-06 18:40:29,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:29,032 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 170 transitions. [2019-11-06 18:40:29,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-06 18:40:29,032 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 170 transitions. [2019-11-06 18:40:29,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-06 18:40:29,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:29,033 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:29,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:29,238 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:29,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:29,238 INFO L82 PathProgramCache]: Analyzing trace with hash 936225111, now seen corresponding path program 19 times [2019-11-06 18:40:29,239 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:29,239 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664835938] [2019-11-06 18:40:29,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:40:29,559 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664835938] [2019-11-06 18:40:29,559 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721098976] [2019-11-06 18:40:29,559 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:29,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:40:29,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-06 18:40:29,670 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:29,670 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-06 18:40:29,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318943086] [2019-11-06 18:40:29,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:40:29,671 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:29,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:40:29,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:40:29,672 INFO L87 Difference]: Start difference. First operand 141 states and 170 transitions. Second operand 27 states. [2019-11-06 18:40:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:29,900 INFO L93 Difference]: Finished difference Result 234 states and 292 transitions. [2019-11-06 18:40:29,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:40:29,901 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 92 [2019-11-06 18:40:29,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:29,903 INFO L225 Difference]: With dead ends: 234 [2019-11-06 18:40:29,903 INFO L226 Difference]: Without dead ends: 144 [2019-11-06 18:40:29,904 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:40:29,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-06 18:40:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2019-11-06 18:40:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-06 18:40:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 172 transitions. [2019-11-06 18:40:29,910 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 172 transitions. Word has length 92 [2019-11-06 18:40:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:29,911 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 172 transitions. [2019-11-06 18:40:29,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:40:29,911 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 172 transitions. [2019-11-06 18:40:29,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-06 18:40:29,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:29,912 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:30,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:30,115 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:30,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:30,115 INFO L82 PathProgramCache]: Analyzing trace with hash 31519801, now seen corresponding path program 20 times [2019-11-06 18:40:30,116 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:30,116 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682346983] [2019-11-06 18:40:30,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:40:30,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682346983] [2019-11-06 18:40:30,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433473552] [2019-11-06 18:40:30,420 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:30,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:40:30,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:30,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:40:30,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-06 18:40:30,551 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:30,551 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-11-06 18:40:30,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337451109] [2019-11-06 18:40:30,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:40:30,554 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:30,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:40:30,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:40:30,555 INFO L87 Difference]: Start difference. First operand 143 states and 172 transitions. Second operand 28 states. [2019-11-06 18:40:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:30,779 INFO L93 Difference]: Finished difference Result 236 states and 294 transitions. [2019-11-06 18:40:30,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 18:40:30,779 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 94 [2019-11-06 18:40:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:30,781 INFO L225 Difference]: With dead ends: 236 [2019-11-06 18:40:30,781 INFO L226 Difference]: Without dead ends: 146 [2019-11-06 18:40:30,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:40:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-06 18:40:30,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-11-06 18:40:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-06 18:40:30,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 174 transitions. [2019-11-06 18:40:30,795 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 174 transitions. Word has length 94 [2019-11-06 18:40:30,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:30,795 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 174 transitions. [2019-11-06 18:40:30,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:40:30,795 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 174 transitions. [2019-11-06 18:40:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-06 18:40:30,796 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:30,796 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:31,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:31,000 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:31,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:31,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1806889317, now seen corresponding path program 21 times [2019-11-06 18:40:31,000 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:31,001 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907452030] [2019-11-06 18:40:31,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:40:31,339 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907452030] [2019-11-06 18:40:31,339 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430950732] [2019-11-06 18:40:31,339 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:31,429 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 18:40:31,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:31,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:40:31,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2019-11-06 18:40:31,572 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:31,572 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2019-11-06 18:40:31,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513348841] [2019-11-06 18:40:31,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-06 18:40:31,573 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:31,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-06 18:40:31,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=933, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 18:40:31,574 INFO L87 Difference]: Start difference. First operand 145 states and 174 transitions. Second operand 37 states. [2019-11-06 18:40:32,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:32,663 INFO L93 Difference]: Finished difference Result 253 states and 319 transitions. [2019-11-06 18:40:32,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-06 18:40:32,664 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 96 [2019-11-06 18:40:32,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:32,665 INFO L225 Difference]: With dead ends: 253 [2019-11-06 18:40:32,666 INFO L226 Difference]: Without dead ends: 163 [2019-11-06 18:40:32,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1187, Invalid=3643, Unknown=0, NotChecked=0, Total=4830 [2019-11-06 18:40:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-06 18:40:32,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 153. [2019-11-06 18:40:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-11-06 18:40:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 184 transitions. [2019-11-06 18:40:32,675 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 184 transitions. Word has length 96 [2019-11-06 18:40:32,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:32,676 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 184 transitions. [2019-11-06 18:40:32,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-06 18:40:32,676 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 184 transitions. [2019-11-06 18:40:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-06 18:40:32,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:32,677 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:32,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:32,880 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1003991762, now seen corresponding path program 22 times [2019-11-06 18:40:32,881 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:32,881 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289522680] [2019-11-06 18:40:32,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 18:40:33,342 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289522680] [2019-11-06 18:40:33,342 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759584825] [2019-11-06 18:40:33,342 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:33,480 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:40:33,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:33,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:40:33,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-06 18:40:33,520 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:33,520 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-06 18:40:33,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360396779] [2019-11-06 18:40:33,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:40:33,521 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:33,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:40:33,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:40:33,522 INFO L87 Difference]: Start difference. First operand 153 states and 184 transitions. Second operand 30 states. [2019-11-06 18:40:33,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:33,841 INFO L93 Difference]: Finished difference Result 252 states and 314 transitions. [2019-11-06 18:40:33,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:40:33,842 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 101 [2019-11-06 18:40:33,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:33,844 INFO L225 Difference]: With dead ends: 252 [2019-11-06 18:40:33,844 INFO L226 Difference]: Without dead ends: 156 [2019-11-06 18:40:33,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:40:33,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-11-06 18:40:33,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2019-11-06 18:40:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-11-06 18:40:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 186 transitions. [2019-11-06 18:40:33,855 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 186 transitions. Word has length 101 [2019-11-06 18:40:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:33,855 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 186 transitions. [2019-11-06 18:40:33,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:40:33,856 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 186 transitions. [2019-11-06 18:40:33,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-06 18:40:33,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:33,857 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:34,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:34,063 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:34,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:34,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2097274740, now seen corresponding path program 23 times [2019-11-06 18:40:34,064 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:34,064 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528764971] [2019-11-06 18:40:34,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 18:40:34,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528764971] [2019-11-06 18:40:34,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585053778] [2019-11-06 18:40:34,439 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:35,104 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2019-11-06 18:40:35,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:35,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:40:35,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-06 18:40:35,132 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:35,132 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 18:40:35,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319647331] [2019-11-06 18:40:35,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:40:35,133 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:35,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:40:35,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:40:35,133 INFO L87 Difference]: Start difference. First operand 155 states and 186 transitions. Second operand 31 states. [2019-11-06 18:40:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:35,318 INFO L93 Difference]: Finished difference Result 254 states and 316 transitions. [2019-11-06 18:40:35,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:40:35,319 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 103 [2019-11-06 18:40:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:35,321 INFO L225 Difference]: With dead ends: 254 [2019-11-06 18:40:35,321 INFO L226 Difference]: Without dead ends: 158 [2019-11-06 18:40:35,322 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:40:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-11-06 18:40:35,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2019-11-06 18:40:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-06 18:40:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2019-11-06 18:40:35,329 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 188 transitions. Word has length 103 [2019-11-06 18:40:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:35,329 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 188 transitions. [2019-11-06 18:40:35,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:40:35,329 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 188 transitions. [2019-11-06 18:40:35,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-06 18:40:35,330 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:35,330 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:35,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:35,535 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:35,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:35,536 INFO L82 PathProgramCache]: Analyzing trace with hash -475229078, now seen corresponding path program 24 times [2019-11-06 18:40:35,536 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:35,537 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922213212] [2019-11-06 18:40:35,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 18:40:36,074 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922213212] [2019-11-06 18:40:36,074 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631151022] [2019-11-06 18:40:36,074 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:36,891 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 18:40:36,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:36,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:40:36,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2019-11-06 18:40:37,074 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:37,075 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2019-11-06 18:40:37,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565200928] [2019-11-06 18:40:37,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-06 18:40:37,076 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:37,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-06 18:40:37,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=1147, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 18:40:37,077 INFO L87 Difference]: Start difference. First operand 157 states and 188 transitions. Second operand 41 states. [2019-11-06 18:40:38,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:38,364 INFO L93 Difference]: Finished difference Result 271 states and 341 transitions. [2019-11-06 18:40:38,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-06 18:40:38,365 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 105 [2019-11-06 18:40:38,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:38,366 INFO L225 Difference]: With dead ends: 271 [2019-11-06 18:40:38,366 INFO L226 Difference]: Without dead ends: 175 [2019-11-06 18:40:38,369 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1469, Invalid=4537, Unknown=0, NotChecked=0, Total=6006 [2019-11-06 18:40:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-06 18:40:38,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2019-11-06 18:40:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-06 18:40:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 198 transitions. [2019-11-06 18:40:38,375 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 198 transitions. Word has length 105 [2019-11-06 18:40:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:38,376 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 198 transitions. [2019-11-06 18:40:38,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-06 18:40:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 198 transitions. [2019-11-06 18:40:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 18:40:38,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:38,377 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:38,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:38,582 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:38,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:38,582 INFO L82 PathProgramCache]: Analyzing trace with hash -14486269, now seen corresponding path program 25 times [2019-11-06 18:40:38,583 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:38,583 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149131761] [2019-11-06 18:40:38,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-11-06 18:40:39,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149131761] [2019-11-06 18:40:39,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709360702] [2019-11-06 18:40:39,045 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:39,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 18:40:39,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-06 18:40:39,199 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:39,199 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-11-06 18:40:39,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875713653] [2019-11-06 18:40:39,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-06 18:40:39,200 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:39,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-06 18:40:39,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 18:40:39,201 INFO L87 Difference]: Start difference. First operand 165 states and 198 transitions. Second operand 33 states. [2019-11-06 18:40:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:39,499 INFO L93 Difference]: Finished difference Result 270 states and 336 transitions. [2019-11-06 18:40:39,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:40:39,500 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 110 [2019-11-06 18:40:39,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:39,502 INFO L225 Difference]: With dead ends: 270 [2019-11-06 18:40:39,502 INFO L226 Difference]: Without dead ends: 168 [2019-11-06 18:40:39,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 18:40:39,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-11-06 18:40:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2019-11-06 18:40:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-11-06 18:40:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 200 transitions. [2019-11-06 18:40:39,517 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 200 transitions. Word has length 110 [2019-11-06 18:40:39,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:39,518 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 200 transitions. [2019-11-06 18:40:39,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-06 18:40:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 200 transitions. [2019-11-06 18:40:39,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 18:40:39,520 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:39,520 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:39,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:39,725 INFO L410 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:39,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:39,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1528957797, now seen corresponding path program 26 times [2019-11-06 18:40:39,726 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:39,726 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165390063] [2019-11-06 18:40:39,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-11-06 18:40:40,363 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165390063] [2019-11-06 18:40:40,363 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063762858] [2019-11-06 18:40:40,364 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:40,489 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:40:40,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:40,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-06 18:40:40,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-06 18:40:40,521 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:40,521 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2019-11-06 18:40:40,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63503978] [2019-11-06 18:40:40,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-06 18:40:40,521 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:40,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-06 18:40:40,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 18:40:40,522 INFO L87 Difference]: Start difference. First operand 167 states and 200 transitions. Second operand 34 states. [2019-11-06 18:40:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:40,729 INFO L93 Difference]: Finished difference Result 272 states and 338 transitions. [2019-11-06 18:40:40,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-06 18:40:40,729 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 112 [2019-11-06 18:40:40,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:40,731 INFO L225 Difference]: With dead ends: 272 [2019-11-06 18:40:40,731 INFO L226 Difference]: Without dead ends: 170 [2019-11-06 18:40:40,732 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 18:40:40,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-06 18:40:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-11-06 18:40:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-11-06 18:40:40,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2019-11-06 18:40:40,739 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 112 [2019-11-06 18:40:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:40,739 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2019-11-06 18:40:40,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-06 18:40:40,740 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2019-11-06 18:40:40,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-06 18:40:40,740 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:40,741 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:40,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:40,944 INFO L410 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:40,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1279979193, now seen corresponding path program 27 times [2019-11-06 18:40:40,945 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:40,945 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290724108] [2019-11-06 18:40:40,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-11-06 18:40:41,575 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290724108] [2019-11-06 18:40:41,575 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376145978] [2019-11-06 18:40:41,575 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:41,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-06 18:40:41,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:41,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:40:41,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2019-11-06 18:40:42,025 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:42,025 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2019-11-06 18:40:42,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74051091] [2019-11-06 18:40:42,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-06 18:40:42,026 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:42,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-06 18:40:42,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1383, Unknown=0, NotChecked=0, Total=1980 [2019-11-06 18:40:42,027 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 45 states. [2019-11-06 18:40:43,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:43,651 INFO L93 Difference]: Finished difference Result 289 states and 363 transitions. [2019-11-06 18:40:43,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-06 18:40:43,652 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 114 [2019-11-06 18:40:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:43,653 INFO L225 Difference]: With dead ends: 289 [2019-11-06 18:40:43,653 INFO L226 Difference]: Without dead ends: 187 [2019-11-06 18:40:43,656 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1781, Invalid=5529, Unknown=0, NotChecked=0, Total=7310 [2019-11-06 18:40:43,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-06 18:40:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2019-11-06 18:40:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-06 18:40:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 212 transitions. [2019-11-06 18:40:43,663 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 212 transitions. Word has length 114 [2019-11-06 18:40:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:43,663 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 212 transitions. [2019-11-06 18:40:43,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-06 18:40:43,663 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 212 transitions. [2019-11-06 18:40:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 18:40:43,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:43,664 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:43,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:43,881 INFO L410 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:43,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1948811390, now seen corresponding path program 28 times [2019-11-06 18:40:43,882 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:43,882 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536527774] [2019-11-06 18:40:43,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-06 18:40:44,448 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536527774] [2019-11-06 18:40:44,448 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554532692] [2019-11-06 18:40:44,449 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:44,558 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:40:44,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:44,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-06 18:40:44,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-11-06 18:40:44,580 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:44,580 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-11-06 18:40:44,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473775546] [2019-11-06 18:40:44,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:40:44,581 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:44,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:40:44,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:40:44,582 INFO L87 Difference]: Start difference. First operand 177 states and 212 transitions. Second operand 36 states. [2019-11-06 18:40:44,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:44,796 INFO L93 Difference]: Finished difference Result 288 states and 358 transitions. [2019-11-06 18:40:44,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 18:40:44,797 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 119 [2019-11-06 18:40:44,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:44,799 INFO L225 Difference]: With dead ends: 288 [2019-11-06 18:40:44,799 INFO L226 Difference]: Without dead ends: 180 [2019-11-06 18:40:44,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:40:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-11-06 18:40:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2019-11-06 18:40:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-11-06 18:40:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2019-11-06 18:40:44,808 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 119 [2019-11-06 18:40:44,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:44,808 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2019-11-06 18:40:44,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:40:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2019-11-06 18:40:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 18:40:44,809 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:44,810 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:45,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:45,013 INFO L410 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:45,013 INFO L82 PathProgramCache]: Analyzing trace with hash 311326560, now seen corresponding path program 29 times [2019-11-06 18:40:45,014 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:45,014 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414937694] [2019-11-06 18:40:45,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-06 18:40:45,580 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414937694] [2019-11-06 18:40:45,581 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453896287] [2019-11-06 18:40:45,581 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:46,621 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2019-11-06 18:40:46,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:46,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-06 18:40:46,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-11-06 18:40:46,649 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:46,649 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-11-06 18:40:46,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834425952] [2019-11-06 18:40:46,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-06 18:40:46,650 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:46,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-06 18:40:46,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 18:40:46,651 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand 37 states. [2019-11-06 18:40:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:46,945 INFO L93 Difference]: Finished difference Result 290 states and 360 transitions. [2019-11-06 18:40:46,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:40:46,946 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 121 [2019-11-06 18:40:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:46,948 INFO L225 Difference]: With dead ends: 290 [2019-11-06 18:40:46,948 INFO L226 Difference]: Without dead ends: 182 [2019-11-06 18:40:46,949 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 18:40:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-06 18:40:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2019-11-06 18:40:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-11-06 18:40:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2019-11-06 18:40:46,957 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 121 [2019-11-06 18:40:46,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:46,958 INFO L462 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2019-11-06 18:40:46,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-06 18:40:46,958 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2019-11-06 18:40:46,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 18:40:46,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:46,959 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:47,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:47,165 INFO L410 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:47,165 INFO L82 PathProgramCache]: Analyzing trace with hash -949555266, now seen corresponding path program 30 times [2019-11-06 18:40:47,166 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:47,166 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655287489] [2019-11-06 18:40:47,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-06 18:40:47,980 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655287489] [2019-11-06 18:40:47,980 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941032834] [2019-11-06 18:40:47,980 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:49,835 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-06 18:40:49,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:49,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:40:49,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 65 proven. 145 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2019-11-06 18:40:50,145 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:50,146 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 16] total 51 [2019-11-06 18:40:50,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613192339] [2019-11-06 18:40:50,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-06 18:40:50,146 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:50,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-06 18:40:50,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=1766, Unknown=0, NotChecked=0, Total=2550 [2019-11-06 18:40:50,147 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand 51 states.