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/data_structures_set_multi_proc_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:42:52,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:42:52,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:42:52,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:42:52,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:42:52,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:42:52,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:42:52,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:42:52,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:42:52,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:42:52,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:42:52,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:42:52,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:42:52,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:42:52,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:42:52,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:42:52,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:42:52,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:42:52,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:42:52,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:42:52,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:42:52,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:42:52,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:42:52,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:42:52,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:42:52,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:42:52,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:42:52,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:42:52,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:42:52,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:42:52,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:42:52,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:42:52,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:42:52,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:42:52,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:42:52,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:42:52,489 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 17:42:52,515 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:42:52,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:42:52,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:42:52,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:42:52,517 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:42:52,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:42:52,518 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:42:52,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:42:52,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:42:52,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:42:52,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:42:52,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:42:52,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:42:52,519 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:42:52,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:42:52,519 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:42:52,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:42:52,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:42:52,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:42:52,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:42:52,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:42:52,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:42:52,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:42:52,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:42:52,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:42:52,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:42:52,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:42:52,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:42:52,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:42:52,800 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:42:52,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:42:52,828 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:42:52,830 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:42:52,830 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:42:52,831 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2019-10-13 17:42:52,896 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ac0e4699/c3a8accda8ad44098d44db55318c6fb2/FLAGc61db7dbb [2019-10-13 17:42:53,371 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:42:53,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2019-10-13 17:42:53,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ac0e4699/c3a8accda8ad44098d44db55318c6fb2/FLAGc61db7dbb [2019-10-13 17:42:53,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ac0e4699/c3a8accda8ad44098d44db55318c6fb2 [2019-10-13 17:42:53,765 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:42:53,766 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:42:53,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:53,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:42:53,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:42:53,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:53" (1/1) ... [2019-10-13 17:42:53,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e788b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:53, skipping insertion in model container [2019-10-13 17:42:53,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:53" (1/1) ... [2019-10-13 17:42:53,783 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:42:53,803 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:42:54,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:54,019 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:42:54,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:54,148 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:42:54,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:54 WrapperNode [2019-10-13 17:42:54,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:54,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:42:54,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:42:54,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:42:54,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:54" (1/1) ... [2019-10-13 17:42:54,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:54" (1/1) ... [2019-10-13 17:42:54,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:54" (1/1) ... [2019-10-13 17:42:54,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:54" (1/1) ... [2019-10-13 17:42:54,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:54" (1/1) ... [2019-10-13 17:42:54,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:54" (1/1) ... [2019-10-13 17:42:54,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:54" (1/1) ... [2019-10-13 17:42:54,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:42:54,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:42:54,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:42:54,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:42:54,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:54" (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 17:42:54,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:42:54,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:42:54,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:42:54,254 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2019-10-13 17:42:54,254 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2019-10-13 17:42:54,254 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:42:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:42:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:42:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:42:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2019-10-13 17:42:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:42:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2019-10-13 17:42:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:42:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:42:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:42:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:42:54,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:42:54,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:42:54,618 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:42:54,619 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-13 17:42:54,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:54 BoogieIcfgContainer [2019-10-13 17:42:54,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:42:54,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:42:54,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:42:54,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:42:54,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:42:53" (1/3) ... [2019-10-13 17:42:54,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e3ce56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:54, skipping insertion in model container [2019-10-13 17:42:54,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:54" (2/3) ... [2019-10-13 17:42:54,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e3ce56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:54, skipping insertion in model container [2019-10-13 17:42:54,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:54" (3/3) ... [2019-10-13 17:42:54,628 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2019-10-13 17:42:54,637 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:42:54,646 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:42:54,656 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:42:54,681 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:42:54,681 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:42:54,681 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:42:54,681 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:42:54,681 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:42:54,681 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:42:54,681 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:42:54,681 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:42:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2019-10-13 17:42:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:42:54,704 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:54,705 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:54,707 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1780536170, now seen corresponding path program 1 times [2019-10-13 17:42:54,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:54,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958377293] [2019-10-13 17:42:54,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:54,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:54,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:54,906 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 17:42:54,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958377293] [2019-10-13 17:42:54,908 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:54,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:42:54,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557689754] [2019-10-13 17:42:54,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:42:54,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:54,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:42:54,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:42:54,927 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2019-10-13 17:42:55,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:55,203 INFO L93 Difference]: Finished difference Result 129 states and 190 transitions. [2019-10-13 17:42:55,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:42:55,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-13 17:42:55,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:55,216 INFO L225 Difference]: With dead ends: 129 [2019-10-13 17:42:55,216 INFO L226 Difference]: Without dead ends: 75 [2019-10-13 17:42:55,220 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 17:42:55,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-13 17:42:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2019-10-13 17:42:55,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-13 17:42:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-10-13 17:42:55,266 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 14 [2019-10-13 17:42:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:55,266 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-10-13 17:42:55,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:42:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-10-13 17:42:55,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:42:55,269 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:55,269 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:55,269 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2111973388, now seen corresponding path program 1 times [2019-10-13 17:42:55,270 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:55,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146060806] [2019-10-13 17:42:55,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:55,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:55,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:55,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146060806] [2019-10-13 17:42:55,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211956510] [2019-10-13 17:42:55,365 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 17:42:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:55,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:42:55,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:55,489 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:55,490 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:42:55,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628173067] [2019-10-13 17:42:55,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:42:55,498 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:55,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:42:55,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:55,501 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2019-10-13 17:42:55,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:55,769 INFO L93 Difference]: Finished difference Result 142 states and 182 transitions. [2019-10-13 17:42:55,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:42:55,769 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-13 17:42:55,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:55,772 INFO L225 Difference]: With dead ends: 142 [2019-10-13 17:42:55,772 INFO L226 Difference]: Without dead ends: 101 [2019-10-13 17:42:55,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-13 17:42:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 52. [2019-10-13 17:42:55,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-13 17:42:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2019-10-13 17:42:55,785 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 16 [2019-10-13 17:42:55,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:55,786 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2019-10-13 17:42:55,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:42:55,786 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2019-10-13 17:42:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 17:42:55,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:55,788 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:56,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:56,001 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:56,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1499407314, now seen corresponding path program 2 times [2019-10-13 17:42:56,002 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:56,002 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952007745] [2019-10-13 17:42:56,002 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:56,003 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:56,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:56,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952007745] [2019-10-13 17:42:56,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753184769] [2019-10-13 17:42:56,104 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 17:42:56,142 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 17:42:56,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:56,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:42:56,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:42:56,164 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:42:56,165 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-10-13 17:42:56,165 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686320662] [2019-10-13 17:42:56,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:42:56,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:56,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:42:56,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:56,166 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 4 states. [2019-10-13 17:42:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:56,202 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2019-10-13 17:42:56,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:42:56,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-13 17:42:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:56,205 INFO L225 Difference]: With dead ends: 96 [2019-10-13 17:42:56,205 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 17:42:56,206 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 17:42:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-10-13 17:42:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-13 17:42:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-10-13 17:42:56,214 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 18 [2019-10-13 17:42:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:56,215 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-10-13 17:42:56,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:42:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-10-13 17:42:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 17:42:56,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:56,217 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:56,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:56,420 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash 723083025, now seen corresponding path program 1 times [2019-10-13 17:42:56,421 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:56,421 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536832629] [2019-10-13 17:42:56,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:56,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:56,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:42:56,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536832629] [2019-10-13 17:42:56,532 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:56,532 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:42:56,532 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122441743] [2019-10-13 17:42:56,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:42:56,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:56,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:42:56,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:42:56,534 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 5 states. [2019-10-13 17:42:56,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:56,704 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2019-10-13 17:42:56,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:56,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-10-13 17:42:56,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:56,706 INFO L225 Difference]: With dead ends: 98 [2019-10-13 17:42:56,706 INFO L226 Difference]: Without dead ends: 62 [2019-10-13 17:42:56,707 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-13 17:42:56,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2019-10-13 17:42:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 17:42:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2019-10-13 17:42:56,715 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 39 [2019-10-13 17:42:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:56,716 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2019-10-13 17:42:56,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:42:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2019-10-13 17:42:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 17:42:56,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:56,717 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:56,718 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:56,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:56,718 INFO L82 PathProgramCache]: Analyzing trace with hash -648100369, now seen corresponding path program 1 times [2019-10-13 17:42:56,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:56,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120017141] [2019-10-13 17:42:56,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:56,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:56,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:42:56,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120017141] [2019-10-13 17:42:56,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682110887] [2019-10-13 17:42:56,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:56,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:42:56,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:42:56,933 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:56,934 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2019-10-13 17:42:56,934 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833753450] [2019-10-13 17:42:56,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:42:56,935 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:56,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:42:56,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:56,936 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 8 states. [2019-10-13 17:42:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:57,174 INFO L93 Difference]: Finished difference Result 116 states and 140 transitions. [2019-10-13 17:42:57,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:42:57,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-10-13 17:42:57,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:57,177 INFO L225 Difference]: With dead ends: 116 [2019-10-13 17:42:57,178 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:42:57,178 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:42:57,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:42:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2019-10-13 17:42:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 17:42:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2019-10-13 17:42:57,195 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 41 [2019-10-13 17:42:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:57,196 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2019-10-13 17:42:57,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:42:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2019-10-13 17:42:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 17:42:57,201 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:57,201 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:57,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:57,407 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:57,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:57,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1873779725, now seen corresponding path program 2 times [2019-10-13 17:42:57,408 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:57,409 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278236000] [2019-10-13 17:42:57,410 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:57,410 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:57,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:42:57,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278236000] [2019-10-13 17:42:57,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804285362] [2019-10-13 17:42:57,540 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:57,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:42:57,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:57,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:42:57,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 17:42:57,633 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:57,633 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2019-10-13 17:42:57,633 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169077272] [2019-10-13 17:42:57,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:42:57,634 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:57,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:42:57,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:42:57,635 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 10 states. [2019-10-13 17:42:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:57,896 INFO L93 Difference]: Finished difference Result 147 states and 183 transitions. [2019-10-13 17:42:57,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:42:57,896 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2019-10-13 17:42:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:57,898 INFO L225 Difference]: With dead ends: 147 [2019-10-13 17:42:57,898 INFO L226 Difference]: Without dead ends: 105 [2019-10-13 17:42:57,899 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:42:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-13 17:42:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2019-10-13 17:42:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-13 17:42:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2019-10-13 17:42:57,909 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 43 [2019-10-13 17:42:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:57,909 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2019-10-13 17:42:57,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:42:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2019-10-13 17:42:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 17:42:57,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:57,911 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:58,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:58,115 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:58,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1764017907, now seen corresponding path program 1 times [2019-10-13 17:42:58,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:58,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188783605] [2019-10-13 17:42:58,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:58,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:58,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:42:58,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188783605] [2019-10-13 17:42:58,247 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:58,247 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:42:58,248 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412834251] [2019-10-13 17:42:58,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:42:58,248 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:58,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:42:58,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:58,249 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 6 states. [2019-10-13 17:42:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:58,405 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2019-10-13 17:42:58,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:42:58,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2019-10-13 17:42:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:58,408 INFO L225 Difference]: With dead ends: 97 [2019-10-13 17:42:58,408 INFO L226 Difference]: Without dead ends: 62 [2019-10-13 17:42:58,409 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:58,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-13 17:42:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-10-13 17:42:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-13 17:42:58,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2019-10-13 17:42:58,416 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 57 [2019-10-13 17:42:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:58,417 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2019-10-13 17:42:58,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:42:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2019-10-13 17:42:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-13 17:42:58,418 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:58,419 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:58,419 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:58,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1023550559, now seen corresponding path program 3 times [2019-10-13 17:42:58,420 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:58,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501652117] [2019-10-13 17:42:58,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:58,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:58,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 17:42:58,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501652117] [2019-10-13 17:42:58,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405308689] [2019-10-13 17:42:58,632 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 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 17:42:58,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:42:58,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:58,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:42:58,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:42:58,837 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:42:58,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 17 [2019-10-13 17:42:58,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958730433] [2019-10-13 17:42:58,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:42:58,838 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:58,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:42:58,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:42:58,839 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 10 states. [2019-10-13 17:42:59,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:59,071 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2019-10-13 17:42:59,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:42:59,071 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2019-10-13 17:42:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:59,075 INFO L225 Difference]: With dead ends: 120 [2019-10-13 17:42:59,075 INFO L226 Difference]: Without dead ends: 102 [2019-10-13 17:42:59,076 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:42:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-13 17:42:59,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2019-10-13 17:42:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-13 17:42:59,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2019-10-13 17:42:59,086 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 62 [2019-10-13 17:42:59,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:59,087 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2019-10-13 17:42:59,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:42:59,087 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2019-10-13 17:42:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-13 17:42:59,088 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:59,088 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:59,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:59,292 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:59,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1822237910, now seen corresponding path program 1 times [2019-10-13 17:42:59,293 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:59,294 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346469061] [2019-10-13 17:42:59,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:59,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:59,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 17:42:59,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346469061] [2019-10-13 17:42:59,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156565521] [2019-10-13 17:42:59,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:42:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:59,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:42:59,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 17:42:59,489 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:59,489 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-10-13 17:42:59,489 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253713100] [2019-10-13 17:42:59,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:42:59,490 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:59,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:42:59,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:42:59,491 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 10 states. [2019-10-13 17:42:59,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:59,724 INFO L93 Difference]: Finished difference Result 168 states and 204 transitions. [2019-10-13 17:42:59,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:42:59,724 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2019-10-13 17:42:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:59,726 INFO L225 Difference]: With dead ends: 168 [2019-10-13 17:42:59,726 INFO L226 Difference]: Without dead ends: 108 [2019-10-13 17:42:59,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:42:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-13 17:42:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2019-10-13 17:42:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 17:42:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2019-10-13 17:42:59,736 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 62 [2019-10-13 17:42:59,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:59,737 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2019-10-13 17:42:59,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:42:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2019-10-13 17:42:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-13 17:42:59,738 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:59,739 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:59,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:59,949 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:59,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:59,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1979313528, now seen corresponding path program 2 times [2019-10-13 17:42:59,950 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:59,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302232125] [2019-10-13 17:42:59,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:59,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:59,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 17:43:00,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302232125] [2019-10-13 17:43:00,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884497088] [2019-10-13 17:43:00,058 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 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 17:43:00,128 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:00,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:00,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:43:00,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 17:43:00,152 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:00,152 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-10-13 17:43:00,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646418927] [2019-10-13 17:43:00,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:43:00,158 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:00,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:43:00,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:43:00,158 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 11 states. [2019-10-13 17:43:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:00,436 INFO L93 Difference]: Finished difference Result 176 states and 214 transitions. [2019-10-13 17:43:00,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:43:00,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2019-10-13 17:43:00,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:00,438 INFO L225 Difference]: With dead ends: 176 [2019-10-13 17:43:00,439 INFO L226 Difference]: Without dead ends: 116 [2019-10-13 17:43:00,439 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-13 17:43:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2019-10-13 17:43:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-13 17:43:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2019-10-13 17:43:00,474 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 64 [2019-10-13 17:43:00,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:00,474 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2019-10-13 17:43:00,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:43:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2019-10-13 17:43:00,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 17:43:00,475 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:00,475 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:00,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:00,676 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:00,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1689840230, now seen corresponding path program 3 times [2019-10-13 17:43:00,677 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:00,677 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618256983] [2019-10-13 17:43:00,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:00,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:00,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 17:43:00,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618256983] [2019-10-13 17:43:00,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001694339] [2019-10-13 17:43:00,808 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 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 17:43:00,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:43:00,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:00,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:43:00,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-13 17:43:00,933 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:00,933 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2019-10-13 17:43:00,933 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959304301] [2019-10-13 17:43:00,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:43:00,935 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:00,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:43:00,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:00,936 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 14 states. [2019-10-13 17:43:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:01,235 INFO L93 Difference]: Finished difference Result 217 states and 268 transitions. [2019-10-13 17:43:01,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 17:43:01,235 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-13 17:43:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:01,237 INFO L225 Difference]: With dead ends: 217 [2019-10-13 17:43:01,237 INFO L226 Difference]: Without dead ends: 157 [2019-10-13 17:43:01,238 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:43:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-13 17:43:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 90. [2019-10-13 17:43:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-13 17:43:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2019-10-13 17:43:01,249 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 66 [2019-10-13 17:43:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:01,250 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2019-10-13 17:43:01,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:43:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2019-10-13 17:43:01,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-13 17:43:01,251 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:01,251 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:01,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:01,464 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:01,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:01,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1331963256, now seen corresponding path program 4 times [2019-10-13 17:43:01,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:01,465 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793366141] [2019-10-13 17:43:01,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:01,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:01,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 17:43:01,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793366141] [2019-10-13 17:43:01,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36268488] [2019-10-13 17:43:01,636 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 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 17:43:01,729 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:01,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:01,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:43:01,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 17:43:01,876 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:01,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-10-13 17:43:01,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11706337] [2019-10-13 17:43:01,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:43:01,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:01,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:43:01,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:01,878 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 18 states. [2019-10-13 17:43:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:02,689 INFO L93 Difference]: Finished difference Result 215 states and 265 transitions. [2019-10-13 17:43:02,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:43:02,690 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-10-13 17:43:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:02,691 INFO L225 Difference]: With dead ends: 215 [2019-10-13 17:43:02,692 INFO L226 Difference]: Without dead ends: 146 [2019-10-13 17:43:02,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=326, Invalid=1396, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 17:43:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-13 17:43:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 87. [2019-10-13 17:43:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-13 17:43:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2019-10-13 17:43:02,719 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 85 [2019-10-13 17:43:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:02,720 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2019-10-13 17:43:02,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:43:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2019-10-13 17:43:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 17:43:02,720 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:02,721 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:02,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:02,922 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:02,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:02,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1358293311, now seen corresponding path program 5 times [2019-10-13 17:43:02,923 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:02,923 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632838618] [2019-10-13 17:43:02,924 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:02,924 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:02,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 17:43:03,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632838618] [2019-10-13 17:43:03,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405546581] [2019-10-13 17:43:03,144 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 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 17:43:03,360 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-10-13 17:43:03,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:03,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:43:03,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-13 17:43:03,441 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:03,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-10-13 17:43:03,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331674828] [2019-10-13 17:43:03,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:43:03,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:03,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:43:03,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:43:03,443 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 17 states. [2019-10-13 17:43:03,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:03,923 INFO L93 Difference]: Finished difference Result 224 states and 272 transitions. [2019-10-13 17:43:03,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:43:03,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 87 [2019-10-13 17:43:03,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:03,925 INFO L225 Difference]: With dead ends: 224 [2019-10-13 17:43:03,925 INFO L226 Difference]: Without dead ends: 160 [2019-10-13 17:43:03,926 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:43:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-10-13 17:43:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 98. [2019-10-13 17:43:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-13 17:43:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2019-10-13 17:43:03,937 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 87 [2019-10-13 17:43:03,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:03,938 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2019-10-13 17:43:03,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:43:03,938 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2019-10-13 17:43:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 17:43:03,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:03,939 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:04,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:04,143 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:04,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:04,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1301333860, now seen corresponding path program 6 times [2019-10-13 17:43:04,145 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:04,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731383898] [2019-10-13 17:43:04,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:04,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:04,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-10-13 17:43:04,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731383898] [2019-10-13 17:43:04,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290687537] [2019-10-13 17:43:04,342 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 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 17:43:04,768 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-13 17:43:04,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:04,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:43:04,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2019-10-13 17:43:04,860 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:04,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-13 17:43:04,860 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638223980] [2019-10-13 17:43:04,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:43:04,863 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:04,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:43:04,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:43:04,864 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 19 states. [2019-10-13 17:43:05,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:05,406 INFO L93 Difference]: Finished difference Result 250 states and 304 transitions. [2019-10-13 17:43:05,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:43:05,406 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 106 [2019-10-13 17:43:05,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:05,408 INFO L225 Difference]: With dead ends: 250 [2019-10-13 17:43:05,408 INFO L226 Difference]: Without dead ends: 177 [2019-10-13 17:43:05,409 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:43:05,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-10-13 17:43:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 109. [2019-10-13 17:43:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-13 17:43:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2019-10-13 17:43:05,420 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 106 [2019-10-13 17:43:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:05,420 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2019-10-13 17:43:05,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:43:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2019-10-13 17:43:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 17:43:05,422 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:05,422 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:05,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:05,627 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:05,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:05,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1402588439, now seen corresponding path program 7 times [2019-10-13 17:43:05,627 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:05,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511752470] [2019-10-13 17:43:05,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:05,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:05,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:43:05,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511752470] [2019-10-13 17:43:05,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836641100] [2019-10-13 17:43:05,828 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 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 17:43:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:43:05,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:43:05,978 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:05,979 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2019-10-13 17:43:05,979 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140570828] [2019-10-13 17:43:05,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:43:05,980 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:05,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:43:05,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:43:05,981 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 16 states. [2019-10-13 17:43:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:06,316 INFO L93 Difference]: Finished difference Result 260 states and 314 transitions. [2019-10-13 17:43:06,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:43:06,318 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 125 [2019-10-13 17:43:06,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:06,320 INFO L225 Difference]: With dead ends: 260 [2019-10-13 17:43:06,320 INFO L226 Difference]: Without dead ends: 178 [2019-10-13 17:43:06,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-10-13 17:43:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 111. [2019-10-13 17:43:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-13 17:43:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2019-10-13 17:43:06,332 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 125 [2019-10-13 17:43:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:06,332 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2019-10-13 17:43:06,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:43:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2019-10-13 17:43:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 17:43:06,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:06,334 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:06,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:06,539 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:06,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:06,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1395161141, now seen corresponding path program 8 times [2019-10-13 17:43:06,539 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:06,539 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935328848] [2019-10-13 17:43:06,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:06,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:06,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:43:06,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935328848] [2019-10-13 17:43:06,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39900537] [2019-10-13 17:43:06,756 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 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 17:43:06,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:06,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:06,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:43:06,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:43:06,900 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:06,900 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-10-13 17:43:06,900 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028579041] [2019-10-13 17:43:06,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:43:06,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:06,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:43:06,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:43:06,902 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand 17 states. [2019-10-13 17:43:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:07,210 INFO L93 Difference]: Finished difference Result 268 states and 324 transitions. [2019-10-13 17:43:07,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:43:07,210 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2019-10-13 17:43:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:07,212 INFO L225 Difference]: With dead ends: 268 [2019-10-13 17:43:07,212 INFO L226 Difference]: Without dead ends: 186 [2019-10-13 17:43:07,213 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:43:07,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-10-13 17:43:07,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 113. [2019-10-13 17:43:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-13 17:43:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2019-10-13 17:43:07,224 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 127 [2019-10-13 17:43:07,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:07,224 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2019-10-13 17:43:07,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:43:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2019-10-13 17:43:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 17:43:07,226 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:07,226 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:07,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:07,431 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:07,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:07,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1447504941, now seen corresponding path program 9 times [2019-10-13 17:43:07,432 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:07,432 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081431674] [2019-10-13 17:43:07,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:07,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:07,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:43:07,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081431674] [2019-10-13 17:43:07,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195487868] [2019-10-13 17:43:07,668 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 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 17:43:08,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:43:08,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:08,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:43:08,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2019-10-13 17:43:08,290 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:08,290 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 23 [2019-10-13 17:43:08,290 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465828404] [2019-10-13 17:43:08,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 17:43:08,291 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:08,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 17:43:08,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:43:08,292 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand 23 states. [2019-10-13 17:43:08,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:08,910 INFO L93 Difference]: Finished difference Result 292 states and 356 transitions. [2019-10-13 17:43:08,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:43:08,910 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 129 [2019-10-13 17:43:08,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:08,912 INFO L225 Difference]: With dead ends: 292 [2019-10-13 17:43:08,912 INFO L226 Difference]: Without dead ends: 210 [2019-10-13 17:43:08,915 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:43:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-10-13 17:43:08,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 124. [2019-10-13 17:43:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-13 17:43:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2019-10-13 17:43:08,927 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 129 [2019-10-13 17:43:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:08,927 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2019-10-13 17:43:08,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 17:43:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2019-10-13 17:43:08,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 17:43:08,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:08,930 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:09,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:09,135 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:09,136 INFO L82 PathProgramCache]: Analyzing trace with hash -927924912, now seen corresponding path program 10 times [2019-10-13 17:43:09,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:09,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902450078] [2019-10-13 17:43:09,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:09,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:09,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-10-13 17:43:09,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902450078] [2019-10-13 17:43:09,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837090887] [2019-10-13 17:43:09,414 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 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 17:43:09,543 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:09,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:09,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:43:09,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-10-13 17:43:09,580 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:09,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 19 [2019-10-13 17:43:09,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179272283] [2019-10-13 17:43:09,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:43:09,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:09,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:43:09,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:43:09,582 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand 19 states. [2019-10-13 17:43:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:10,039 INFO L93 Difference]: Finished difference Result 302 states and 366 transitions. [2019-10-13 17:43:10,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:43:10,040 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 148 [2019-10-13 17:43:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:10,042 INFO L225 Difference]: With dead ends: 302 [2019-10-13 17:43:10,042 INFO L226 Difference]: Without dead ends: 211 [2019-10-13 17:43:10,043 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:43:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-10-13 17:43:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 126. [2019-10-13 17:43:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-13 17:43:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2019-10-13 17:43:10,055 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 148 [2019-10-13 17:43:10,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:10,055 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2019-10-13 17:43:10,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:43:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2019-10-13 17:43:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 17:43:10,059 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:10,059 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:10,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:10,263 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:10,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1140805518, now seen corresponding path program 11 times [2019-10-13 17:43:10,264 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:10,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443648193] [2019-10-13 17:43:10,265 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:10,265 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:10,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-10-13 17:43:10,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443648193] [2019-10-13 17:43:10,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26223056] [2019-10-13 17:43:10,586 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 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 17:43:21,824 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-10-13 17:43:21,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:21,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:43:21,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-10-13 17:43:21,864 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:21,864 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2019-10-13 17:43:21,864 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090189254] [2019-10-13 17:43:21,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:43:21,866 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:21,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:43:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:43:21,866 INFO L87 Difference]: Start difference. First operand 126 states and 144 transitions. Second operand 20 states. [2019-10-13 17:43:22,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:22,242 INFO L93 Difference]: Finished difference Result 310 states and 376 transitions. [2019-10-13 17:43:22,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:43:22,242 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 150 [2019-10-13 17:43:22,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:22,244 INFO L225 Difference]: With dead ends: 310 [2019-10-13 17:43:22,244 INFO L226 Difference]: Without dead ends: 219 [2019-10-13 17:43:22,245 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:43:22,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-10-13 17:43:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 128. [2019-10-13 17:43:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-10-13 17:43:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2019-10-13 17:43:22,256 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 150 [2019-10-13 17:43:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:22,257 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2019-10-13 17:43:22,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:43:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2019-10-13 17:43:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 17:43:22,259 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:22,259 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:22,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:22,468 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:22,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:22,469 INFO L82 PathProgramCache]: Analyzing trace with hash 439362324, now seen corresponding path program 12 times [2019-10-13 17:43:22,469 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:22,469 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296069654] [2019-10-13 17:43:22,469 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:22,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:22,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-10-13 17:43:22,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296069654] [2019-10-13 17:43:22,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361934711] [2019-10-13 17:43:22,721 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 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 17:43:24,024 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 17:43:24,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:24,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:43:24,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 29 proven. 111 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2019-10-13 17:43:24,193 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:24,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2019-10-13 17:43:24,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018778976] [2019-10-13 17:43:24,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-13 17:43:24,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:24,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-13 17:43:24,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:43:24,195 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand 29 states. [2019-10-13 17:43:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:25,092 INFO L93 Difference]: Finished difference Result 347 states and 426 transitions. [2019-10-13 17:43:25,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 17:43:25,093 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 152 [2019-10-13 17:43:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:25,096 INFO L225 Difference]: With dead ends: 347 [2019-10-13 17:43:25,096 INFO L226 Difference]: Without dead ends: 256 [2019-10-13 17:43:25,097 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=963, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 17:43:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-10-13 17:43:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 141. [2019-10-13 17:43:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-10-13 17:43:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2019-10-13 17:43:25,122 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 152 [2019-10-13 17:43:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:25,124 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2019-10-13 17:43:25,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-13 17:43:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2019-10-13 17:43:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 17:43:25,128 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:25,128 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:25,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:25,336 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:25,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1016744197, now seen corresponding path program 13 times [2019-10-13 17:43:25,337 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:25,337 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431008830] [2019-10-13 17:43:25,337 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:25,337 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:25,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2019-10-13 17:43:25,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431008830] [2019-10-13 17:43:25,660 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772619732] [2019-10-13 17:43:25,660 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 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 17:43:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:25,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 17:43:25,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2019-10-13 17:43:25,835 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:25,835 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 23 [2019-10-13 17:43:25,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467907572] [2019-10-13 17:43:25,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 17:43:25,836 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:25,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 17:43:25,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:43:25,837 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand 23 states. [2019-10-13 17:43:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:26,501 INFO L93 Difference]: Finished difference Result 352 states and 428 transitions. [2019-10-13 17:43:26,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:43:26,501 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 173 [2019-10-13 17:43:26,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:26,502 INFO L225 Difference]: With dead ends: 352 [2019-10-13 17:43:26,502 INFO L226 Difference]: Without dead ends: 252 [2019-10-13 17:43:26,503 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:43:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-10-13 17:43:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 143. [2019-10-13 17:43:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-13 17:43:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 163 transitions. [2019-10-13 17:43:26,517 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 163 transitions. Word has length 173 [2019-10-13 17:43:26,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:26,517 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 163 transitions. [2019-10-13 17:43:26,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 17:43:26,517 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 163 transitions. [2019-10-13 17:43:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 17:43:26,519 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:26,519 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:26,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:26,731 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:26,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:26,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2077818845, now seen corresponding path program 14 times [2019-10-13 17:43:26,731 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:26,731 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138922195] [2019-10-13 17:43:26,731 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:26,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:26,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2019-10-13 17:43:27,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138922195] [2019-10-13 17:43:27,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275348770] [2019-10-13 17:43:27,076 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 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 17:43:27,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:27,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:27,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 17:43:27,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2019-10-13 17:43:27,260 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:27,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2019-10-13 17:43:27,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904941598] [2019-10-13 17:43:27,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:43:27,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:27,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:43:27,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:43:27,263 INFO L87 Difference]: Start difference. First operand 143 states and 163 transitions. Second operand 24 states. [2019-10-13 17:43:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:27,838 INFO L93 Difference]: Finished difference Result 360 states and 438 transitions. [2019-10-13 17:43:27,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:43:27,841 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 175 [2019-10-13 17:43:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:27,843 INFO L225 Difference]: With dead ends: 360 [2019-10-13 17:43:27,843 INFO L226 Difference]: Without dead ends: 260 [2019-10-13 17:43:27,845 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:43:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-10-13 17:43:27,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 145. [2019-10-13 17:43:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-13 17:43:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2019-10-13 17:43:27,864 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 175 [2019-10-13 17:43:27,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:27,865 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2019-10-13 17:43:27,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:43:27,865 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2019-10-13 17:43:27,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 17:43:27,868 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:27,868 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:28,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:28,081 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:28,082 INFO L82 PathProgramCache]: Analyzing trace with hash 459433921, now seen corresponding path program 15 times [2019-10-13 17:43:28,082 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:28,082 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418193719] [2019-10-13 17:43:28,082 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:28,082 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:28,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2019-10-13 17:43:28,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418193719] [2019-10-13 17:43:28,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436055237] [2019-10-13 17:43:28,400 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 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 17:43:29,308 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-13 17:43:29,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:29,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:43:29,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2019-10-13 17:43:29,500 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:29,500 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 32 [2019-10-13 17:43:29,500 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597633986] [2019-10-13 17:43:29,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 17:43:29,503 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:29,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 17:43:29,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=713, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:43:29,504 INFO L87 Difference]: Start difference. First operand 145 states and 165 transitions. Second operand 32 states. [2019-10-13 17:43:30,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:30,767 INFO L93 Difference]: Finished difference Result 384 states and 470 transitions. [2019-10-13 17:43:30,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-13 17:43:30,767 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 177 [2019-10-13 17:43:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:30,769 INFO L225 Difference]: With dead ends: 384 [2019-10-13 17:43:30,769 INFO L226 Difference]: Without dead ends: 284 [2019-10-13 17:43:30,770 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1176, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 17:43:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2019-10-13 17:43:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 156. [2019-10-13 17:43:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-10-13 17:43:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 178 transitions. [2019-10-13 17:43:30,788 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 178 transitions. Word has length 177 [2019-10-13 17:43:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:30,788 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 178 transitions. [2019-10-13 17:43:30,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-13 17:43:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 178 transitions. [2019-10-13 17:43:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-13 17:43:30,790 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:30,790 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:30,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:30,995 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:30,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1872656478, now seen corresponding path program 16 times [2019-10-13 17:43:30,995 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:30,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467366721] [2019-10-13 17:43:30,996 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:30,996 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:30,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2019-10-13 17:43:31,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467366721] [2019-10-13 17:43:31,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910850561] [2019-10-13 17:43:31,443 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 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 17:43:31,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:31,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:31,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:43:31,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2019-10-13 17:43:31,782 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:31,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2019-10-13 17:43:31,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108364268] [2019-10-13 17:43:31,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 17:43:31,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:31,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 17:43:31,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:43:31,784 INFO L87 Difference]: Start difference. First operand 156 states and 178 transitions. Second operand 26 states. [2019-10-13 17:43:32,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:32,646 INFO L93 Difference]: Finished difference Result 394 states and 480 transitions. [2019-10-13 17:43:32,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:43:32,647 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 196 [2019-10-13 17:43:32,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:32,649 INFO L225 Difference]: With dead ends: 394 [2019-10-13 17:43:32,649 INFO L226 Difference]: Without dead ends: 285 [2019-10-13 17:43:32,650 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:43:32,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-10-13 17:43:32,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 158. [2019-10-13 17:43:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-10-13 17:43:32,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2019-10-13 17:43:32,670 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 196 [2019-10-13 17:43:32,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:32,671 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2019-10-13 17:43:32,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 17:43:32,671 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2019-10-13 17:43:32,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-13 17:43:32,672 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:32,674 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:32,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:32,884 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:32,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:32,884 INFO L82 PathProgramCache]: Analyzing trace with hash 816164548, now seen corresponding path program 17 times [2019-10-13 17:43:32,884 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:32,885 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488317135] [2019-10-13 17:43:32,885 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:32,885 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:32,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2019-10-13 17:43:33,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488317135] [2019-10-13 17:43:33,339 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557621820] [2019-10-13 17:43:33,339 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 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