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/standard_partition_original_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:47:03,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:47:03,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:47:03,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:47:03,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:47:03,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:47:03,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:47:03,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:47:03,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:47:03,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:47:03,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:47:03,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:47:03,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:47:03,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:47:03,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:47:03,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:47:03,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:47:03,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:47:03,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:47:03,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:47:03,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:47:03,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:47:03,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:47:03,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:47:03,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:47:03,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:47:03,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:47:03,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:47:03,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:47:03,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:47:03,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:47:03,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:47:03,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:47:03,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:47:03,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:47:03,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:47:03,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:47:03,518 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:47:03,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:47:03,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:47:03,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:47:03,520 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:47:03,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:47:03,521 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:47:03,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:47:03,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:47:03,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:47:03,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:47:03,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:47:03,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:47:03,523 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:47:03,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:47:03,524 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:47:03,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:47:03,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:47:03,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:47:03,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:47:03,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:47:03,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:47:03,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:47:03,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:47:03,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:47:03,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:47:03,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:47:03,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:47:03,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:47:03,781 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:47:03,800 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:47:03,803 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:47:03,804 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:47:03,805 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:47:03,805 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2019-10-13 17:47:03,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aea99777/6ee42568c5b34e48ad199dd70ce38187/FLAG1d717a3c4 [2019-10-13 17:47:04,344 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:47:04,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2019-10-13 17:47:04,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aea99777/6ee42568c5b34e48ad199dd70ce38187/FLAG1d717a3c4 [2019-10-13 17:47:04,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aea99777/6ee42568c5b34e48ad199dd70ce38187 [2019-10-13 17:47:04,737 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:47:04,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:47:04,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:47:04,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:47:04,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:47:04,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47fbaaba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04, skipping insertion in model container [2019-10-13 17:47:04,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,753 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:47:04,770 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:47:04,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:47:04,944 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:47:04,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:47:04,984 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:47:04,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04 WrapperNode [2019-10-13 17:47:04,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:47:04,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:47:04,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:47:04,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:47:05,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:05,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:05,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:05,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:05,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:05,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:05,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:05,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:47:05,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:47:05,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:47:05,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:47:05,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:47:05,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:47:05,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:47:05,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:47:05,180 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:47:05,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:47:05,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:47:05,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:47:05,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:47:05,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:47:05,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:47:05,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:47:05,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:47:05,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:47:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:47:05,492 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:47:05,493 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-13 17:47:05,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:47:05 BoogieIcfgContainer [2019-10-13 17:47:05,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:47:05,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:47:05,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:47:05,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:47:05,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:47:04" (1/3) ... [2019-10-13 17:47:05,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7443bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:47:05, skipping insertion in model container [2019-10-13 17:47:05,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (2/3) ... [2019-10-13 17:47:05,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7443bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:47:05, skipping insertion in model container [2019-10-13 17:47:05,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:47:05" (3/3) ... [2019-10-13 17:47:05,509 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2019-10-13 17:47:05,521 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:47:05,545 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:47:05,556 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:47:05,577 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:47:05,578 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:47:05,578 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:47:05,578 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:47:05,578 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:47:05,578 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:47:05,578 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:47:05,578 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:47:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-13 17:47:05,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:47:05,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:05,601 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:05,603 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:05,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:05,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1902154591, now seen corresponding path program 1 times [2019-10-13 17:47:05,614 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:05,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010883133] [2019-10-13 17:47:05,615 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,615 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:47:05,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010883133] [2019-10-13 17:47:05,795 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:05,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:47:05,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390751206] [2019-10-13 17:47:05,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:47:05,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:05,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:47:05,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:47:05,818 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-13 17:47:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:05,957 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2019-10-13 17:47:05,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:47:05,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-13 17:47:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:05,971 INFO L225 Difference]: With dead ends: 56 [2019-10-13 17:47:05,972 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 17:47:05,983 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:47:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 17:47:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-13 17:47:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:47:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-13 17:47:06,046 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2019-10-13 17:47:06,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:06,047 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-13 17:47:06,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:47:06,048 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-13 17:47:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:47:06,051 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:06,051 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:06,052 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1137378726, now seen corresponding path program 1 times [2019-10-13 17:47:06,054 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:06,054 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418722190] [2019-10-13 17:47:06,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:47:06,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418722190] [2019-10-13 17:47:06,176 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:06,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:47:06,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239572518] [2019-10-13 17:47:06,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:47:06,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:06,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:47:06,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:47:06,180 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2019-10-13 17:47:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:06,300 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-13 17:47:06,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:47:06,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-13 17:47:06,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:06,304 INFO L225 Difference]: With dead ends: 48 [2019-10-13 17:47:06,304 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 17:47:06,306 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:47:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 17:47:06,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-13 17:47:06,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 17:47:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-13 17:47:06,320 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2019-10-13 17:47:06,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:06,320 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-13 17:47:06,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:47:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-13 17:47:06,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:47:06,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:06,323 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:06,324 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:06,326 INFO L82 PathProgramCache]: Analyzing trace with hash -62722692, now seen corresponding path program 1 times [2019-10-13 17:47:06,326 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:06,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290150435] [2019-10-13 17:47:06,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:47:06,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290150435] [2019-10-13 17:47:06,438 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:06,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:47:06,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686587154] [2019-10-13 17:47:06,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:47:06,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:06,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:47:06,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:47:06,443 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-10-13 17:47:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:06,539 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2019-10-13 17:47:06,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:47:06,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-13 17:47:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:06,541 INFO L225 Difference]: With dead ends: 47 [2019-10-13 17:47:06,541 INFO L226 Difference]: Without dead ends: 31 [2019-10-13 17:47:06,542 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:47:06,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-13 17:47:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-13 17:47:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:47:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-13 17:47:06,550 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2019-10-13 17:47:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:06,551 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-13 17:47:06,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:47:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-13 17:47:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 17:47:06,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:06,552 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:06,553 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:06,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:06,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1291417548, now seen corresponding path program 1 times [2019-10-13 17:47:06,554 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:06,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838520920] [2019-10-13 17:47:06,554 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,554 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:47:06,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838520920] [2019-10-13 17:47:06,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620342351] [2019-10-13 17:47:06,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:47:06,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:47:06,794 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:06,794 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-13 17:47:06,794 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350122481] [2019-10-13 17:47:06,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:47:06,795 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:06,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:47:06,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:47:06,805 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 7 states. [2019-10-13 17:47:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:06,944 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2019-10-13 17:47:06,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:47:06,945 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-10-13 17:47:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:06,946 INFO L225 Difference]: With dead ends: 57 [2019-10-13 17:47:06,946 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 17:47:06,947 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:47:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 17:47:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-10-13 17:47:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 17:47:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-13 17:47:06,960 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 19 [2019-10-13 17:47:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:06,960 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-13 17:47:06,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:47:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-13 17:47:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:47:06,963 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:06,963 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:07,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,169 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:07,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2132493154, now seen corresponding path program 2 times [2019-10-13 17:47:07,170 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:07,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790846208] [2019-10-13 17:47:07,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:47:07,278 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790846208] [2019-10-13 17:47:07,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138603810] [2019-10-13 17:47:07,279 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 [2019-10-13 17:47:07,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:07,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:07,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:47:07,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:47:07,340 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:07,340 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:47:07,340 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138570424] [2019-10-13 17:47:07,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:47:07,341 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:07,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:47:07,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:47:07,342 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 7 states. [2019-10-13 17:47:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:07,429 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2019-10-13 17:47:07,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:47:07,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-10-13 17:47:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:07,431 INFO L225 Difference]: With dead ends: 60 [2019-10-13 17:47:07,431 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 17:47:07,432 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:47:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 17:47:07,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-13 17:47:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 17:47:07,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-10-13 17:47:07,438 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2019-10-13 17:47:07,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:07,439 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-10-13 17:47:07,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:47:07,439 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-10-13 17:47:07,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 17:47:07,440 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:07,440 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:07,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,645 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:07,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:07,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1329681088, now seen corresponding path program 3 times [2019-10-13 17:47:07,646 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:07,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678692318] [2019-10-13 17:47:07,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:47:07,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678692318] [2019-10-13 17:47:07,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560624289] [2019-10-13 17:47:07,759 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,821 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:47:07,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:07,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:47:07,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:47:07,867 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:07,867 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-13 17:47:07,867 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441946197] [2019-10-13 17:47:07,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:47:07,868 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:47:07,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:47:07,869 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 10 states. [2019-10-13 17:47:08,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:08,073 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2019-10-13 17:47:08,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:47:08,074 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-10-13 17:47:08,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:08,075 INFO L225 Difference]: With dead ends: 67 [2019-10-13 17:47:08,075 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 17:47:08,076 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:47:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 17:47:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-10-13 17:47:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 17:47:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-10-13 17:47:08,091 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 26 [2019-10-13 17:47:08,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:08,092 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-10-13 17:47:08,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:47:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-10-13 17:47:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 17:47:08,093 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:08,093 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:08,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:08,306 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash -921201114, now seen corresponding path program 4 times [2019-10-13 17:47:08,308 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:08,308 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53631687] [2019-10-13 17:47:08,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:08,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:08,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:47:08,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53631687] [2019-10-13 17:47:08,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221494497] [2019-10-13 17:47:08,411 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:08,463 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:08,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:08,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:47:08,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:47:08,482 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:08,483 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:47:08,483 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012192788] [2019-10-13 17:47:08,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:47:08,484 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:08,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:47:08,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:47:08,485 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 9 states. [2019-10-13 17:47:08,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:08,591 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2019-10-13 17:47:08,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:47:08,592 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-10-13 17:47:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:08,593 INFO L225 Difference]: With dead ends: 70 [2019-10-13 17:47:08,593 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 17:47:08,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:47:08,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 17:47:08,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-10-13 17:47:08,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 17:47:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2019-10-13 17:47:08,608 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2019-10-13 17:47:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:08,608 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2019-10-13 17:47:08,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:47:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2019-10-13 17:47:08,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-13 17:47:08,621 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:08,621 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:08,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:08,833 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:08,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:08,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1716647100, now seen corresponding path program 5 times [2019-10-13 17:47:08,834 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:08,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780869285] [2019-10-13 17:47:08,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:08,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:08,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:47:08,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780869285] [2019-10-13 17:47:08,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339078344] [2019-10-13 17:47:08,982 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:09,059 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 17:47:09,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:09,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:47:09,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:47:09,161 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:09,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-10-13 17:47:09,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193759061] [2019-10-13 17:47:09,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:47:09,163 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:09,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:47:09,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:47:09,163 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 13 states. [2019-10-13 17:47:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:09,409 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2019-10-13 17:47:09,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:47:09,413 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-10-13 17:47:09,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:09,414 INFO L225 Difference]: With dead ends: 77 [2019-10-13 17:47:09,414 INFO L226 Difference]: Without dead ends: 51 [2019-10-13 17:47:09,415 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:47:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-13 17:47:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-10-13 17:47:09,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-13 17:47:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-10-13 17:47:09,421 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 33 [2019-10-13 17:47:09,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:09,421 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-10-13 17:47:09,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:47:09,421 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-10-13 17:47:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 17:47:09,422 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:09,423 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:09,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:09,628 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:09,629 INFO L82 PathProgramCache]: Analyzing trace with hash 949236390, now seen corresponding path program 6 times [2019-10-13 17:47:09,629 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:09,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342784757] [2019-10-13 17:47:09,630 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:09,630 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:09,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 17:47:09,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342784757] [2019-10-13 17:47:09,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438042715] [2019-10-13 17:47:09,729 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:09,821 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:47:09,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:09,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:47:09,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 17:47:09,887 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:09,887 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-10-13 17:47:09,887 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376426937] [2019-10-13 17:47:09,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:47:09,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:09,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:47:09,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:47:09,888 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 15 states. [2019-10-13 17:47:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:10,139 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2019-10-13 17:47:10,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:47:10,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2019-10-13 17:47:10,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:10,141 INFO L225 Difference]: With dead ends: 85 [2019-10-13 17:47:10,141 INFO L226 Difference]: Without dead ends: 56 [2019-10-13 17:47:10,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:47:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-13 17:47:10,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2019-10-13 17:47:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 17:47:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2019-10-13 17:47:10,149 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 38 [2019-10-13 17:47:10,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:10,149 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2019-10-13 17:47:10,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:47:10,150 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2019-10-13 17:47:10,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 17:47:10,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:10,151 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:10,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:10,355 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:10,356 INFO L82 PathProgramCache]: Analyzing trace with hash 135156224, now seen corresponding path program 7 times [2019-10-13 17:47:10,356 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:10,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293534279] [2019-10-13 17:47:10,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:10,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:10,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:47:10,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293534279] [2019-10-13 17:47:10,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871243224] [2019-10-13 17:47:10,515 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:47:10,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:47:10,618 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:10,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:47:10,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25633703] [2019-10-13 17:47:10,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:47:10,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:10,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:47:10,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:47:10,620 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 12 states. [2019-10-13 17:47:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:10,713 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2019-10-13 17:47:10,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:47:10,714 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2019-10-13 17:47:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:10,715 INFO L225 Difference]: With dead ends: 88 [2019-10-13 17:47:10,715 INFO L226 Difference]: Without dead ends: 56 [2019-10-13 17:47:10,717 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:47:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-13 17:47:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-10-13 17:47:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 17:47:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2019-10-13 17:47:10,723 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 43 [2019-10-13 17:47:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:10,724 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2019-10-13 17:47:10,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:47:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2019-10-13 17:47:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 17:47:10,725 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:10,725 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:10,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:10,939 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:10,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:10,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2096630302, now seen corresponding path program 8 times [2019-10-13 17:47:10,940 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:10,940 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767735378] [2019-10-13 17:47:10,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:10,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:10,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:47:11,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767735378] [2019-10-13 17:47:11,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024772662] [2019-10-13 17:47:11,065 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 [2019-10-13 17:47:11,116 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:11,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:11,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:47:11,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:47:11,144 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:11,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:47:11,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946837459] [2019-10-13 17:47:11,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:47:11,146 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:11,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:47:11,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:47:11,147 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 13 states. [2019-10-13 17:47:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:11,224 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2019-10-13 17:47:11,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:47:11,225 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2019-10-13 17:47:11,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:11,226 INFO L225 Difference]: With dead ends: 90 [2019-10-13 17:47:11,227 INFO L226 Difference]: Without dead ends: 58 [2019-10-13 17:47:11,228 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:47:11,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-13 17:47:11,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-13 17:47:11,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:47:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2019-10-13 17:47:11,234 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 45 [2019-10-13 17:47:11,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:11,234 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2019-10-13 17:47:11,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:47:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2019-10-13 17:47:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 17:47:11,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:11,236 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:11,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:11,439 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:11,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1582576316, now seen corresponding path program 9 times [2019-10-13 17:47:11,440 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:11,441 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982411096] [2019-10-13 17:47:11,441 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:11,441 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:11,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:47:11,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982411096] [2019-10-13 17:47:11,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500857888] [2019-10-13 17:47:11,568 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 [2019-10-13 17:47:11,650 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:47:11,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:11,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:47:11,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 17:47:11,755 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:11,755 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2019-10-13 17:47:11,755 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374406947] [2019-10-13 17:47:11,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:47:11,756 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:11,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:47:11,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:47:11,757 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 19 states. [2019-10-13 17:47:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:12,022 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2019-10-13 17:47:12,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:47:12,023 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2019-10-13 17:47:12,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:12,024 INFO L225 Difference]: With dead ends: 97 [2019-10-13 17:47:12,024 INFO L226 Difference]: Without dead ends: 65 [2019-10-13 17:47:12,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:47:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-13 17:47:12,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2019-10-13 17:47:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-13 17:47:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2019-10-13 17:47:12,033 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 47 [2019-10-13 17:47:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:12,033 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2019-10-13 17:47:12,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:47:12,033 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2019-10-13 17:47:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:47:12,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:12,034 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:12,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:12,239 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:12,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1818080430, now seen corresponding path program 10 times [2019-10-13 17:47:12,240 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:12,241 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888056156] [2019-10-13 17:47:12,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:12,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:12,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:47:12,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888056156] [2019-10-13 17:47:12,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231832199] [2019-10-13 17:47:12,390 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 [2019-10-13 17:47:12,458 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:12,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:12,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:47:12,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:47:12,495 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:12,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-13 17:47:12,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891027688] [2019-10-13 17:47:12,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:47:12,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:12,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:47:12,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:47:12,499 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 15 states. [2019-10-13 17:47:12,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:12,621 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2019-10-13 17:47:12,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:47:12,621 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2019-10-13 17:47:12,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:12,622 INFO L225 Difference]: With dead ends: 100 [2019-10-13 17:47:12,622 INFO L226 Difference]: Without dead ends: 65 [2019-10-13 17:47:12,626 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:47:12,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-13 17:47:12,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-13 17:47:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-13 17:47:12,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2019-10-13 17:47:12,633 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 52 [2019-10-13 17:47:12,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:12,633 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2019-10-13 17:47:12,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:47:12,633 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2019-10-13 17:47:12,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:47:12,637 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:12,637 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:12,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:12,838 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:12,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:12,839 INFO L82 PathProgramCache]: Analyzing trace with hash -679592368, now seen corresponding path program 11 times [2019-10-13 17:47:12,839 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:12,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591360909] [2019-10-13 17:47:12,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:12,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:12,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:47:12,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591360909] [2019-10-13 17:47:12,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849734948] [2019-10-13 17:47:12,995 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 [2019-10-13 17:47:13,261 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-13 17:47:13,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:13,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:47:13,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:47:13,286 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:13,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-13 17:47:13,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643596503] [2019-10-13 17:47:13,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:47:13,289 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:13,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:47:13,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:47:13,290 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 16 states. [2019-10-13 17:47:13,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:13,390 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2019-10-13 17:47:13,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:47:13,390 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2019-10-13 17:47:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:13,391 INFO L225 Difference]: With dead ends: 102 [2019-10-13 17:47:13,391 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 17:47:13,392 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:47:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 17:47:13,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-10-13 17:47:13,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-13 17:47:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2019-10-13 17:47:13,397 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 54 [2019-10-13 17:47:13,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:13,397 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2019-10-13 17:47:13,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:47:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2019-10-13 17:47:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:47:13,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:13,399 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:13,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:13,609 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:13,609 INFO L82 PathProgramCache]: Analyzing trace with hash -56432782, now seen corresponding path program 12 times [2019-10-13 17:47:13,609 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:13,609 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365143256] [2019-10-13 17:47:13,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:13,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:13,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:47:13,793 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365143256] [2019-10-13 17:47:13,793 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571823085] [2019-10-13 17:47:13,793 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 [2019-10-13 17:47:14,578 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 17:47:14,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:14,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:47:14,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-13 17:47:14,670 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:14,670 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2019-10-13 17:47:14,670 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468720423] [2019-10-13 17:47:14,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 17:47:14,671 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:14,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 17:47:14,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:47:14,672 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 23 states. [2019-10-13 17:47:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:15,090 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2019-10-13 17:47:15,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:47:15,091 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2019-10-13 17:47:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:15,092 INFO L225 Difference]: With dead ends: 109 [2019-10-13 17:47:15,092 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:47:15,093 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=832, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:47:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:47:15,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2019-10-13 17:47:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-13 17:47:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2019-10-13 17:47:15,098 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 56 [2019-10-13 17:47:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:15,098 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2019-10-13 17:47:15,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 17:47:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2019-10-13 17:47:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 17:47:15,099 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:15,100 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:15,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:15,305 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:15,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:15,306 INFO L82 PathProgramCache]: Analyzing trace with hash -63148492, now seen corresponding path program 13 times [2019-10-13 17:47:15,306 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:15,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582639440] [2019-10-13 17:47:15,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:15,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:15,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:47:15,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582639440] [2019-10-13 17:47:15,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410407270] [2019-10-13 17:47:15,464 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 [2019-10-13 17:47:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:15,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:47:15,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:47:15,558 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:15,558 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:47:15,558 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830750614] [2019-10-13 17:47:15,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:47:15,559 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:15,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:47:15,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:47:15,560 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 18 states. [2019-10-13 17:47:15,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:15,697 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2019-10-13 17:47:15,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:47:15,698 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2019-10-13 17:47:15,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:15,698 INFO L225 Difference]: With dead ends: 112 [2019-10-13 17:47:15,698 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:47:15,699 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:47:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:47:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-13 17:47:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:47:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2019-10-13 17:47:15,704 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 61 [2019-10-13 17:47:15,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:15,705 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2019-10-13 17:47:15,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:47:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2019-10-13 17:47:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 17:47:15,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:15,706 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:15,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:15,909 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:15,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:15,910 INFO L82 PathProgramCache]: Analyzing trace with hash -115369262, now seen corresponding path program 14 times [2019-10-13 17:47:15,910 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:15,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153540602] [2019-10-13 17:47:15,911 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:15,911 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:15,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:47:16,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153540602] [2019-10-13 17:47:16,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681237103] [2019-10-13 17:47:16,094 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 [2019-10-13 17:47:16,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:16,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:16,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:47:16,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:47:16,182 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:16,182 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:47:16,182 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662495767] [2019-10-13 17:47:16,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:47:16,183 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:16,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:47:16,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:47:16,184 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 19 states. [2019-10-13 17:47:16,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:16,347 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2019-10-13 17:47:16,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:47:16,347 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2019-10-13 17:47:16,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:16,348 INFO L225 Difference]: With dead ends: 114 [2019-10-13 17:47:16,348 INFO L226 Difference]: Without dead ends: 76 [2019-10-13 17:47:16,349 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:47:16,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-13 17:47:16,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-13 17:47:16,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-13 17:47:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2019-10-13 17:47:16,354 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 63 [2019-10-13 17:47:16,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:16,355 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2019-10-13 17:47:16,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:47:16,355 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2019-10-13 17:47:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-13 17:47:16,356 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:16,356 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:16,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:16,565 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:16,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:16,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1240078320, now seen corresponding path program 15 times [2019-10-13 17:47:16,566 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:16,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007184048] [2019-10-13 17:47:16,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:16,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:16,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:47:16,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007184048] [2019-10-13 17:47:16,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252664923] [2019-10-13 17:47:16,756 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 [2019-10-13 17:47:16,911 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-13 17:47:16,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:16,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:47:16,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-13 17:47:17,031 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:17,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2019-10-13 17:47:17,031 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811605272] [2019-10-13 17:47:17,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 17:47:17,032 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:17,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 17:47:17,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:47:17,033 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 27 states. [2019-10-13 17:47:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:17,520 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2019-10-13 17:47:17,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:47:17,520 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 65 [2019-10-13 17:47:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:17,521 INFO L225 Difference]: With dead ends: 121 [2019-10-13 17:47:17,521 INFO L226 Difference]: Without dead ends: 83 [2019-10-13 17:47:17,522 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=615, Invalid=1191, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 17:47:17,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-13 17:47:17,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2019-10-13 17:47:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-13 17:47:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2019-10-13 17:47:17,528 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 65 [2019-10-13 17:47:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:17,528 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2019-10-13 17:47:17,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 17:47:17,529 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2019-10-13 17:47:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 17:47:17,529 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:17,529 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:17,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:17,732 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:17,732 INFO L82 PathProgramCache]: Analyzing trace with hash -72626566, now seen corresponding path program 16 times [2019-10-13 17:47:17,733 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:17,733 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253975616] [2019-10-13 17:47:17,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:17,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:17,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-13 17:47:17,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253975616] [2019-10-13 17:47:17,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228958770] [2019-10-13 17:47:17,964 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 [2019-10-13 17:47:18,061 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:18,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:18,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:47:18,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-13 17:47:18,086 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:18,086 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:47:18,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907737577] [2019-10-13 17:47:18,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:47:18,087 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:18,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:47:18,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:47:18,088 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 21 states. [2019-10-13 17:47:18,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:18,239 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2019-10-13 17:47:18,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:47:18,240 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2019-10-13 17:47:18,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:18,241 INFO L225 Difference]: With dead ends: 124 [2019-10-13 17:47:18,241 INFO L226 Difference]: Without dead ends: 83 [2019-10-13 17:47:18,242 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:47:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-13 17:47:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-10-13 17:47:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-13 17:47:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2019-10-13 17:47:18,246 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 70 [2019-10-13 17:47:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:18,247 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2019-10-13 17:47:18,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:47:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2019-10-13 17:47:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 17:47:18,248 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:18,248 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:18,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:18,452 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:18,452 INFO L82 PathProgramCache]: Analyzing trace with hash 854455196, now seen corresponding path program 17 times [2019-10-13 17:47:18,452 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:18,453 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285576846] [2019-10-13 17:47:18,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:18,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:18,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-13 17:47:18,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285576846] [2019-10-13 17:47:18,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67987327] [2019-10-13 17:47:18,671 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 [2019-10-13 17:47:21,636 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-13 17:47:21,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:21,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:47:21,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-13 17:47:21,832 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:21,832 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2019-10-13 17:47:21,832 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595268310] [2019-10-13 17:47:21,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:47:21,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:21,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:47:21,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=624, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:47:21,836 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 30 states. [2019-10-13 17:47:22,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:22,384 INFO L93 Difference]: Finished difference Result 131 states and 158 transitions. [2019-10-13 17:47:22,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:47:22,384 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2019-10-13 17:47:22,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:22,385 INFO L225 Difference]: With dead ends: 131 [2019-10-13 17:47:22,385 INFO L226 Difference]: Without dead ends: 90 [2019-10-13 17:47:22,387 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2019-10-13 17:47:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-13 17:47:22,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2019-10-13 17:47:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-13 17:47:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2019-10-13 17:47:22,392 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 72 [2019-10-13 17:47:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:22,392 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2019-10-13 17:47:22,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:47:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2019-10-13 17:47:22,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-13 17:47:22,393 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:22,393 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:22,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:22,597 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:22,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:22,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1955134922, now seen corresponding path program 18 times [2019-10-13 17:47:22,598 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:22,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82575901] [2019-10-13 17:47:22,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:22,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:22,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-13 17:47:22,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82575901] [2019-10-13 17:47:22,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108942034] [2019-10-13 17:47:22,822 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 [2019-10-13 17:47:27,601 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-13 17:47:27,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:27,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 17:47:27,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-13 17:47:27,630 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:27,630 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-10-13 17:47:27,631 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893805539] [2019-10-13 17:47:27,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 17:47:27,631 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:27,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 17:47:27,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:47:27,632 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 23 states. [2019-10-13 17:47:27,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:27,812 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2019-10-13 17:47:27,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 17:47:27,812 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2019-10-13 17:47:27,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:27,813 INFO L225 Difference]: With dead ends: 134 [2019-10-13 17:47:27,814 INFO L226 Difference]: Without dead ends: 90 [2019-10-13 17:47:27,814 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:47:27,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-13 17:47:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-13 17:47:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-13 17:47:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2019-10-13 17:47:27,820 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 77 [2019-10-13 17:47:27,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:27,820 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2019-10-13 17:47:27,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 17:47:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2019-10-13 17:47:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-13 17:47:27,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:27,821 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:28,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:28,022 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1181429352, now seen corresponding path program 19 times [2019-10-13 17:47:28,023 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:28,023 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860162883] [2019-10-13 17:47:28,024 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:28,024 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:28,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-13 17:47:28,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860162883] [2019-10-13 17:47:28,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143540414] [2019-10-13 17:47:28,282 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 [2019-10-13 17:47:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:28,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 17:47:28,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-13 17:47:28,387 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:28,387 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-13 17:47:28,387 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844967617] [2019-10-13 17:47:28,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:47:28,388 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:28,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:47:28,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:47:28,388 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand 24 states. [2019-10-13 17:47:28,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:28,553 INFO L93 Difference]: Finished difference Result 136 states and 162 transitions. [2019-10-13 17:47:28,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:47:28,555 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2019-10-13 17:47:28,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:28,556 INFO L225 Difference]: With dead ends: 136 [2019-10-13 17:47:28,556 INFO L226 Difference]: Without dead ends: 92 [2019-10-13 17:47:28,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:47:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-13 17:47:28,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-13 17:47:28,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-13 17:47:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2019-10-13 17:47:28,561 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 79 [2019-10-13 17:47:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:28,561 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2019-10-13 17:47:28,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:47:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2019-10-13 17:47:28,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-13 17:47:28,562 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:28,562 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:28,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:28,766 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:28,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:28,766 INFO L82 PathProgramCache]: Analyzing trace with hash 679718790, now seen corresponding path program 20 times [2019-10-13 17:47:28,766 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:28,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859363899] [2019-10-13 17:47:28,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:28,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:28,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-13 17:47:29,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859363899] [2019-10-13 17:47:29,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985497987] [2019-10-13 17:47:29,033 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 [2019-10-13 17:47:29,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:29,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:29,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:47:29,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-13 17:47:29,185 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:29,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-13 17:47:29,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39519719] [2019-10-13 17:47:29,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:47:29,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:29,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:47:29,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:47:29,189 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand 25 states. [2019-10-13 17:47:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:29,401 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2019-10-13 17:47:29,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:47:29,402 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2019-10-13 17:47:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:29,402 INFO L225 Difference]: With dead ends: 138 [2019-10-13 17:47:29,403 INFO L226 Difference]: Without dead ends: 94 [2019-10-13 17:47:29,403 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:47:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-13 17:47:29,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-13 17:47:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-13 17:47:29,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2019-10-13 17:47:29,407 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 81 [2019-10-13 17:47:29,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:29,407 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2019-10-13 17:47:29,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:47:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2019-10-13 17:47:29,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-13 17:47:29,408 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:29,408 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:29,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:29,612 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:29,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:29,613 INFO L82 PathProgramCache]: Analyzing trace with hash -427794140, now seen corresponding path program 21 times [2019-10-13 17:47:29,613 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:29,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106728097] [2019-10-13 17:47:29,614 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:29,614 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:29,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-13 17:47:29,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106728097] [2019-10-13 17:47:29,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420033398] [2019-10-13 17:47:29,892 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 [2019-10-13 17:47:30,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-13 17:47:30,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:30,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:47:30,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-13 17:47:30,806 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:30,806 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12] total 35 [2019-10-13 17:47:30,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154781782] [2019-10-13 17:47:30,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-13 17:47:30,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:30,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-13 17:47:30,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=847, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 17:47:30,809 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand 35 states. [2019-10-13 17:47:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:31,474 INFO L93 Difference]: Finished difference Result 145 states and 174 transitions. [2019-10-13 17:47:31,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-13 17:47:31,474 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 83 [2019-10-13 17:47:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:31,475 INFO L225 Difference]: With dead ends: 145 [2019-10-13 17:47:31,476 INFO L226 Difference]: Without dead ends: 101 [2019-10-13 17:47:31,477 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1091, Invalid=2101, Unknown=0, NotChecked=0, Total=3192 [2019-10-13 17:47:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-13 17:47:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2019-10-13 17:47:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-13 17:47:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2019-10-13 17:47:31,481 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 83 [2019-10-13 17:47:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:31,482 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2019-10-13 17:47:31,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-13 17:47:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2019-10-13 17:47:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 17:47:31,482 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:31,483 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:31,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:31,687 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:31,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:31,688 INFO L82 PathProgramCache]: Analyzing trace with hash -921230266, now seen corresponding path program 22 times [2019-10-13 17:47:31,688 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:31,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969477890] [2019-10-13 17:47:31,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:31,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:31,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-13 17:47:32,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969477890] [2019-10-13 17:47:32,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996940162] [2019-10-13 17:47:32,107 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 [2019-10-13 17:47:32,205 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:32,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:32,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 17:47:32,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-13 17:47:32,228 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:32,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-13 17:47:32,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105520395] [2019-10-13 17:47:32,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 17:47:32,229 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:32,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 17:47:32,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:47:32,230 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 27 states. [2019-10-13 17:47:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:32,426 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2019-10-13 17:47:32,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 17:47:32,426 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2019-10-13 17:47:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:32,427 INFO L225 Difference]: With dead ends: 148 [2019-10-13 17:47:32,427 INFO L226 Difference]: Without dead ends: 101 [2019-10-13 17:47:32,428 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:47:32,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-13 17:47:32,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-10-13 17:47:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-13 17:47:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2019-10-13 17:47:32,432 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 88 [2019-10-13 17:47:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:32,432 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2019-10-13 17:47:32,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 17:47:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2019-10-13 17:47:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 17:47:32,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:32,433 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:32,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:32,638 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:32,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:32,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1687880936, now seen corresponding path program 23 times [2019-10-13 17:47:32,638 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:32,639 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189135303] [2019-10-13 17:47:32,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:32,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:32,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-13 17:47:33,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189135303] [2019-10-13 17:47:33,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416332347] [2019-10-13 17:47:33,009 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 [2019-10-13 17:47:43,388 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-13 17:47:43,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:43,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:47:43,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-10-13 17:47:43,657 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:43,658 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2019-10-13 17:47:43,658 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951636245] [2019-10-13 17:47:43,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-13 17:47:43,658 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:43,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-13 17:47:43,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 17:47:43,660 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 38 states. [2019-10-13 17:47:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:44,462 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2019-10-13 17:47:44,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-13 17:47:44,463 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2019-10-13 17:47:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:44,464 INFO L225 Difference]: With dead ends: 155 [2019-10-13 17:47:44,464 INFO L226 Difference]: Without dead ends: 108 [2019-10-13 17:47:44,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1292, Invalid=2490, Unknown=0, NotChecked=0, Total=3782 [2019-10-13 17:47:44,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-13 17:47:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2019-10-13 17:47:44,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-13 17:47:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2019-10-13 17:47:44,470 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 90 [2019-10-13 17:47:44,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:44,471 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2019-10-13 17:47:44,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-13 17:47:44,471 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2019-10-13 17:47:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 17:47:44,472 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:44,472 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:44,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:44,673 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:44,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:44,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1621118334, now seen corresponding path program 24 times [2019-10-13 17:47:44,674 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:44,674 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010258865] [2019-10-13 17:47:44,674 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:44,674 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:44,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:47:45,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010258865] [2019-10-13 17:47:45,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604807286] [2019-10-13 17:47:45,015 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