java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_03.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:46:52,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:46:52,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:46:52,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:46:52,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:46:52,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:46:52,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:46:52,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:46:52,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:46:52,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:46:52,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:46:52,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:46:52,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:46:52,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:46:52,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:46:52,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:46:52,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:46:52,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:46:52,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:46:52,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:46:52,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:46:52,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:46:52,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:46:52,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:46:52,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:46:52,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:46:52,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:46:52,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:46:52,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:46:52,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:46:52,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:46:52,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:46:52,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:46:52,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:46:52,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:46:52,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:46:52,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:46:52,462 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:46:52,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:46:52,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:46:52,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:46:52,467 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:46:52,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:46:52,467 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:46:52,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:46:52,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:46:52,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:46:52,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:46:52,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:46:52,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:46:52,471 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:46:52,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:46:52,472 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:46:52,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:46:52,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:46:52,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:46:52,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:46:52,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:46:52,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:52,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:46:52,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:46:52,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:46:52,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:46:52,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:46:52,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:46:52,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:46:52,766 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:46:52,777 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:46:52,780 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:46:52,781 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:46:52,782 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:46:52,782 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_03.i [2019-10-14 21:46:52,855 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e6866699/aefced2d32d441d0ad7c770f6037a375/FLAG9fc93cea4 [2019-10-14 21:46:53,342 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:46:53,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_03.i [2019-10-14 21:46:53,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e6866699/aefced2d32d441d0ad7c770f6037a375/FLAG9fc93cea4 [2019-10-14 21:46:53,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e6866699/aefced2d32d441d0ad7c770f6037a375 [2019-10-14 21:46:53,740 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:46:53,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:46:53,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:53,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:46:53,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:46:53,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:53,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c472977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53, skipping insertion in model container [2019-10-14 21:46:53,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:53,757 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:46:53,772 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:46:53,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:53,929 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:46:53,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:53,969 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:46:53,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53 WrapperNode [2019-10-14 21:46:53,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:53,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:46:53,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:46:53,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:46:54,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:46:54,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:46:54,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:46:54,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:46:54,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:54,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:46:54,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:46:54,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:46:54,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:46:54,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:46:54,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:46:54,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:46:54,172 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:46:54,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:46:54,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:46:54,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:46:54,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:46:54,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:46:54,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:46:54,412 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:46:54,412 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:46:54,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:54 BoogieIcfgContainer [2019-10-14 21:46:54,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:46:54,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:46:54,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:46:54,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:46:54,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:46:53" (1/3) ... [2019-10-14 21:46:54,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a604a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:54, skipping insertion in model container [2019-10-14 21:46:54,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (2/3) ... [2019-10-14 21:46:54,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a604a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:54, skipping insertion in model container [2019-10-14 21:46:54,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:54" (3/3) ... [2019-10-14 21:46:54,429 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_03.i [2019-10-14 21:46:54,453 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:46:54,461 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:46:54,472 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:46:54,506 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:46:54,506 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:46:54,507 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:46:54,507 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:46:54,507 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:46:54,507 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:46:54,507 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:46:54,507 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:46:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-14 21:46:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:54,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:54,544 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:54,549 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:54,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:54,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2019-10-14 21:46:54,564 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:54,564 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27710391] [2019-10-14 21:46:54,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:54,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:54,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:54,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27710391] [2019-10-14 21:46:54,718 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:54,718 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:46:54,718 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204242143] [2019-10-14 21:46:54,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:46:54,723 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:54,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:46:54,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:54,743 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-14 21:46:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:54,842 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2019-10-14 21:46:54,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:46:54,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:46:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:54,853 INFO L225 Difference]: With dead ends: 41 [2019-10-14 21:46:54,853 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 21:46:54,856 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 21:46:54,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 21:46:54,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 21:46:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-14 21:46:54,892 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2019-10-14 21:46:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:54,892 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-14 21:46:54,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:46:54,893 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-14 21:46:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:54,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:54,894 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:54,895 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:54,895 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2019-10-14 21:46:54,896 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:54,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569008973] [2019-10-14 21:46:54,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:54,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:54,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:54,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569008973] [2019-10-14 21:46:54,979 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:54,980 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:54,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139733379] [2019-10-14 21:46:54,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:54,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:54,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:54,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:54,983 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2019-10-14 21:46:55,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:55,073 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-10-14 21:46:55,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:55,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:46:55,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:55,075 INFO L225 Difference]: With dead ends: 32 [2019-10-14 21:46:55,075 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 21:46:55,077 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:55,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 21:46:55,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 21:46:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 21:46:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-14 21:46:55,088 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-10-14 21:46:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:55,089 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-14 21:46:55,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-14 21:46:55,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:46:55,092 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:55,092 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:55,093 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:55,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:55,095 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2019-10-14 21:46:55,096 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:55,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106054150] [2019-10-14 21:46:55,096 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,097 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:55,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106054150] [2019-10-14 21:46:55,181 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:55,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:55,182 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645660683] [2019-10-14 21:46:55,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:55,182 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:55,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:55,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:55,183 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-10-14 21:46:55,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:55,272 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-14 21:46:55,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:55,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:46:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:55,275 INFO L225 Difference]: With dead ends: 34 [2019-10-14 21:46:55,275 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:46:55,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:46:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-10-14 21:46:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 21:46:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-14 21:46:55,286 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-10-14 21:46:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:55,286 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-14 21:46:55,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-14 21:46:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:46:55,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:55,288 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:55,288 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:55,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:55,289 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2019-10-14 21:46:55,289 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:55,289 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410601143] [2019-10-14 21:46:55,289 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,289 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:55,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410601143] [2019-10-14 21:46:55,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396293885] [2019-10-14 21:46:55,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:46:55,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:55,506 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:55,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:46:55,507 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540277272] [2019-10-14 21:46:55,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:55,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:55,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:55,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:55,509 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-10-14 21:46:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:55,638 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-14 21:46:55,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:46:55,641 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-10-14 21:46:55,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:55,642 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:46:55,642 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:46:55,645 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:46:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-10-14 21:46:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:46:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-14 21:46:55,653 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-10-14 21:46:55,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:55,654 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-14 21:46:55,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-14 21:46:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:46:55,656 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:55,656 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:55,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:55,866 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:55,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:55,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1897825622, now seen corresponding path program 2 times [2019-10-14 21:46:55,866 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:55,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285850507] [2019-10-14 21:46:55,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:46:55,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285850507] [2019-10-14 21:46:55,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871329943] [2019-10-14 21:46:55,956 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 [2019-10-14 21:46:56,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:56,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:56,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:46:56,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:56,048 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:56,048 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-14 21:46:56,048 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443151019] [2019-10-14 21:46:56,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:46:56,049 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:56,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:46:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:56,050 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-10-14 21:46:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:56,185 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-10-14 21:46:56,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:46:56,186 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-10-14 21:46:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:56,187 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:46:56,187 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:46:56,187 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:46:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-10-14 21:46:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:46:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-14 21:46:56,194 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2019-10-14 21:46:56,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:56,195 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-14 21:46:56,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:46:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-14 21:46:56,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:46:56,196 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:56,196 INFO L380 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:56,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:56,408 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1456795255, now seen corresponding path program 3 times [2019-10-14 21:46:56,410 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:56,410 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249937002] [2019-10-14 21:46:56,410 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:56,411 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:56,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:46:56,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249937002] [2019-10-14 21:46:56,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817086525] [2019-10-14 21:46:56,534 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:56,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:46:56,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:56,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:46:56,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:46:56,619 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:56,620 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:46:56,620 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160705575] [2019-10-14 21:46:56,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:46:56,621 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:56,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:46:56,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:46:56,621 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2019-10-14 21:46:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:56,771 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-10-14 21:46:56,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:46:56,772 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-10-14 21:46:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:56,773 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:46:56,773 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:46:56,774 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:46:56,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:46:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2019-10-14 21:46:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:46:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-14 21:46:56,786 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2019-10-14 21:46:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:56,786 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-14 21:46:56,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:46:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-14 21:46:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:46:56,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:56,789 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:56,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:56,993 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:56,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:56,993 INFO L82 PathProgramCache]: Analyzing trace with hash -33873434, now seen corresponding path program 4 times [2019-10-14 21:46:56,993 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:56,994 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390186720] [2019-10-14 21:46:56,994 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:56,994 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:56,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:46:57,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390186720] [2019-10-14 21:46:57,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130819053] [2019-10-14 21:46:57,086 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:57,149 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:57,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:57,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:46:57,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:46:57,234 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:57,235 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2019-10-14 21:46:57,235 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797889461] [2019-10-14 21:46:57,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:46:57,236 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:57,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:46:57,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:46:57,237 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 14 states. [2019-10-14 21:46:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:57,412 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2019-10-14 21:46:57,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:46:57,412 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2019-10-14 21:46:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:57,413 INFO L225 Difference]: With dead ends: 65 [2019-10-14 21:46:57,413 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:46:57,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:46:57,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:46:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2019-10-14 21:46:57,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:46:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-10-14 21:46:57,421 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2019-10-14 21:46:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:57,422 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-10-14 21:46:57,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:46:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-10-14 21:46:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:46:57,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:57,423 INFO L380 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:57,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:57,627 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:57,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1963168809, now seen corresponding path program 5 times [2019-10-14 21:46:57,628 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:57,629 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853167628] [2019-10-14 21:46:57,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:46:57,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853167628] [2019-10-14 21:46:57,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943669945] [2019-10-14 21:46:57,770 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:58,042 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:46:58,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:58,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:46:58,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:46:58,081 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:58,082 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:46:58,082 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181955702] [2019-10-14 21:46:58,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:46:58,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:58,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:46:58,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:58,083 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 10 states. [2019-10-14 21:46:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:58,217 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-14 21:46:58,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:46:58,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-10-14 21:46:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:58,224 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:46:58,224 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 21:46:58,225 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:58,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 21:46:58,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2019-10-14 21:46:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:46:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-14 21:46:58,235 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2019-10-14 21:46:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:58,235 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-14 21:46:58,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:46:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-14 21:46:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:46:58,238 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:58,238 INFO L380 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:58,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:58,448 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:58,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1389169850, now seen corresponding path program 6 times [2019-10-14 21:46:58,449 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:58,449 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761986346] [2019-10-14 21:46:58,449 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,449 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:46:58,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761986346] [2019-10-14 21:46:58,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446128323] [2019-10-14 21:46:58,556 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:58,726 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-14 21:46:58,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:58,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:46:58,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:46:58,743 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:58,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:46:58,744 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946461090] [2019-10-14 21:46:58,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:46:58,745 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:58,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:46:58,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:46:58,745 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2019-10-14 21:46:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:58,915 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2019-10-14 21:46:58,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:46:58,915 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2019-10-14 21:46:58,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:58,916 INFO L225 Difference]: With dead ends: 67 [2019-10-14 21:46:58,917 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:46:58,917 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:46:58,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:46:58,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2019-10-14 21:46:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:46:58,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-10-14 21:46:58,924 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2019-10-14 21:46:58,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:58,925 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-10-14 21:46:58,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:46:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-10-14 21:46:58,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:46:58,926 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:58,926 INFO L380 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:59,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,136 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:59,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:59,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2062514121, now seen corresponding path program 7 times [2019-10-14 21:46:59,137 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:59,138 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985922296] [2019-10-14 21:46:59,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:46:59,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985922296] [2019-10-14 21:46:59,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030935951] [2019-10-14 21:46:59,337 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:46:59,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:46:59,476 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:59,476 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2019-10-14 21:46:59,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187193178] [2019-10-14 21:46:59,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:46:59,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:59,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:46:59,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=188, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:59,478 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 19 states. [2019-10-14 21:46:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:59,698 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2019-10-14 21:46:59,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:46:59,698 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2019-10-14 21:46:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:59,699 INFO L225 Difference]: With dead ends: 85 [2019-10-14 21:46:59,699 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:46:59,700 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=188, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:46:59,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2019-10-14 21:46:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:46:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-10-14 21:46:59,708 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 32 [2019-10-14 21:46:59,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:59,708 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-10-14 21:46:59,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:46:59,708 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-10-14 21:46:59,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:46:59,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:59,709 INFO L380 BasicCegarLoop]: trace histogram [15, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:59,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,913 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash 937962954, now seen corresponding path program 8 times [2019-10-14 21:46:59,914 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:59,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806861940] [2019-10-14 21:46:59,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-10-14 21:47:00,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806861940] [2019-10-14 21:47:00,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641517051] [2019-10-14 21:47:00,049 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:00,114 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:00,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:00,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:47:00,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:47:00,224 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:00,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 24 [2019-10-14 21:47:00,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493995397] [2019-10-14 21:47:00,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:47:00,225 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:00,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:47:00,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=298, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:47:00,225 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 24 states. [2019-10-14 21:47:00,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:00,483 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2019-10-14 21:47:00,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:47:00,483 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2019-10-14 21:47:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:00,485 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:47:00,485 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 21:47:00,486 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=254, Invalid=298, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:47:00,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 21:47:00,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 48. [2019-10-14 21:47:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:47:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-10-14 21:47:00,494 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 38 [2019-10-14 21:47:00,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:00,494 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-10-14 21:47:00,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:47:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-10-14 21:47:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 21:47:00,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:00,496 INFO L380 BasicCegarLoop]: trace histogram [20, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:00,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:00,700 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2101408535, now seen corresponding path program 9 times [2019-10-14 21:47:00,701 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:00,702 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787758558] [2019-10-14 21:47:00,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:00,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:00,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-14 21:47:00,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787758558] [2019-10-14 21:47:00,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131811266] [2019-10-14 21:47:00,851 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,246 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:47:01,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:01,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:47:01,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-14 21:47:01,284 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:01,284 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:47:01,284 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790397011] [2019-10-14 21:47:01,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:47:01,285 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:01,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:47:01,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:01,286 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 14 states. [2019-10-14 21:47:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:01,490 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2019-10-14 21:47:01,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:47:01,491 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2019-10-14 21:47:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:01,492 INFO L225 Difference]: With dead ends: 89 [2019-10-14 21:47:01,492 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:47:01,493 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:01,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:47:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2019-10-14 21:47:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:47:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2019-10-14 21:47:01,501 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2019-10-14 21:47:01,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:01,502 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2019-10-14 21:47:01,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:47:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2019-10-14 21:47:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:47:01,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:01,503 INFO L380 BasicCegarLoop]: trace histogram [20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:01,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,706 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:01,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1457951366, now seen corresponding path program 10 times [2019-10-14 21:47:01,707 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:01,707 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405091751] [2019-10-14 21:47:01,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-14 21:47:01,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405091751] [2019-10-14 21:47:01,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591558797] [2019-10-14 21:47:01,871 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,998 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:01,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:02,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:47:02,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:47:02,239 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:02,239 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 29 [2019-10-14 21:47:02,240 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347857761] [2019-10-14 21:47:02,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 21:47:02,241 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:02,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 21:47:02,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=433, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:47:02,244 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 29 states. [2019-10-14 21:47:02,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:02,523 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2019-10-14 21:47:02,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:47:02,524 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 45 [2019-10-14 21:47:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:02,525 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:47:02,525 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 21:47:02,526 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=433, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:47:02,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 21:47:02,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2019-10-14 21:47:02,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:47:02,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2019-10-14 21:47:02,534 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 45 [2019-10-14 21:47:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:02,535 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2019-10-14 21:47:02,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 21:47:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2019-10-14 21:47:02,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:47:02,536 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:02,536 INFO L380 BasicCegarLoop]: trace histogram [25, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:02,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:02,741 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:02,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:02,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2048897253, now seen corresponding path program 11 times [2019-10-14 21:47:02,742 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:02,743 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300339857] [2019-10-14 21:47:02,743 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:02,743 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:02,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-10-14 21:47:02,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300339857] [2019-10-14 21:47:02,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913046840] [2019-10-14 21:47:02,902 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:21,836 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-10-14 21:47:21,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:21,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:47:21,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-10-14 21:47:21,882 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:21,882 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:47:21,882 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727515231] [2019-10-14 21:47:21,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:47:21,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:21,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:47:21,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:47:21,884 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 16 states. [2019-10-14 21:47:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:22,170 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2019-10-14 21:47:22,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:47:22,170 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2019-10-14 21:47:22,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:22,172 INFO L225 Difference]: With dead ends: 102 [2019-10-14 21:47:22,172 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 21:47:22,173 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:47:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 21:47:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 56. [2019-10-14 21:47:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:47:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-10-14 21:47:22,181 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2019-10-14 21:47:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:22,181 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-10-14 21:47:22,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:47:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-10-14 21:47:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:47:22,182 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:22,183 INFO L380 BasicCegarLoop]: trace histogram [25, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:22,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:22,403 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:22,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1268411914, now seen corresponding path program 12 times [2019-10-14 21:47:22,404 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:22,404 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763785568] [2019-10-14 21:47:22,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:22,405 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:22,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-10-14 21:47:22,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763785568] [2019-10-14 21:47:22,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839138463] [2019-10-14 21:47:22,618 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true