/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:22:01,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:22:01,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:22:01,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:22:01,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:22:01,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:22:01,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:22:01,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:22:01,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:22:01,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:22:01,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:22:01,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:22:01,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:22:01,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:22:01,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:22:01,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:22:01,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:22:01,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:22:01,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:22:01,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:22:01,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:22:01,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:22:01,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:22:01,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:22:01,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:22:01,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:22:01,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:22:01,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:22:01,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:22:01,490 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:22:01,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:22:01,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:22:01,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:22:01,492 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:22:01,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:22:01,493 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:22:01,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:22:01,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:22:01,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:22:01,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:22:01,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:22:01,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:22:01,494 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:22:01,494 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:22:01,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:22:01,496 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:22:01,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:22:01,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:22:01,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:22:01,497 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:22:01,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:22:01,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:22:01,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:22:01,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:22:01,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:22:01,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:22:01,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:22:01,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:22:01,498 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:22:01,803 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:22:01,823 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:22:01,827 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:22:01,828 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:22:01,829 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:22:01,830 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2019-11-23 20:22:01,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21b5f8c40/494749e7665948a0a706b9a8352c0bbd/FLAG9c91ca2d3 [2019-11-23 20:22:02,333 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:22:02,334 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2019-11-23 20:22:02,341 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21b5f8c40/494749e7665948a0a706b9a8352c0bbd/FLAG9c91ca2d3 [2019-11-23 20:22:02,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21b5f8c40/494749e7665948a0a706b9a8352c0bbd [2019-11-23 20:22:02,736 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:22:02,737 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:22:02,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:22:02,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:22:02,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:22:02,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:22:02" (1/1) ... [2019-11-23 20:22:02,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@116608d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:02, skipping insertion in model container [2019-11-23 20:22:02,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:22:02" (1/1) ... [2019-11-23 20:22:02,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:22:02,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:22:02,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:22:02,975 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:22:03,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:22:03,035 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:22:03,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:03 WrapperNode [2019-11-23 20:22:03,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:22:03,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:22:03,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:22:03,037 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:22:03,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:03" (1/1) ... [2019-11-23 20:22:03,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:03" (1/1) ... [2019-11-23 20:22:03,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:22:03,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:22:03,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:22:03,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:22:03,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:03" (1/1) ... [2019-11-23 20:22:03,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:03" (1/1) ... [2019-11-23 20:22:03,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:03" (1/1) ... [2019-11-23 20:22:03,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:03" (1/1) ... [2019-11-23 20:22:03,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:03" (1/1) ... [2019-11-23 20:22:03,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:03" (1/1) ... [2019-11-23 20:22:03,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:03" (1/1) ... [2019-11-23 20:22:03,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:22:03,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:22:03,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:22:03,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:22:03,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:22:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:22:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:22:03,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:22:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:22:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:22:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:22:03,556 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:22:03,556 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 20:22:03,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:22:03 BoogieIcfgContainer [2019-11-23 20:22:03,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:22:03,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:22:03,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:22:03,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:22:03,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:22:02" (1/3) ... [2019-11-23 20:22:03,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ab09c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:22:03, skipping insertion in model container [2019-11-23 20:22:03,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:03" (2/3) ... [2019-11-23 20:22:03,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ab09c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:22:03, skipping insertion in model container [2019-11-23 20:22:03,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:22:03" (3/3) ... [2019-11-23 20:22:03,573 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2019-11-23 20:22:03,581 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:22:03,587 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:22:03,598 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:22:03,621 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:22:03,621 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:22:03,621 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:22:03,622 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:22:03,622 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:22:03,622 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:22:03,622 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:22:03,622 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:22:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-23 20:22:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:22:03,641 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:03,641 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:03,642 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:03,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:03,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2053894623, now seen corresponding path program 1 times [2019-11-23 20:22:03,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:03,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414311904] [2019-11-23 20:22:03,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:22:03,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414311904] [2019-11-23 20:22:03,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:22:03,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:22:03,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200048195] [2019-11-23 20:22:03,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:22:03,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:03,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:22:03,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:03,850 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-11-23 20:22:03,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:03,923 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-11-23 20:22:03,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:22:03,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-23 20:22:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:03,945 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:22:03,945 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:22:03,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:03,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:22:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-23 20:22:04,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:22:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-23 20:22:04,008 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2019-11-23 20:22:04,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:04,009 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-23 20:22:04,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:22:04,010 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-23 20:22:04,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:22:04,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:04,012 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:04,013 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:04,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:04,014 INFO L82 PathProgramCache]: Analyzing trace with hash -418223009, now seen corresponding path program 1 times [2019-11-23 20:22:04,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:04,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891813451] [2019-11-23 20:22:04,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:22:04,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891813451] [2019-11-23 20:22:04,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:22:04,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:22:04,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107275302] [2019-11-23 20:22:04,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:22:04,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:04,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:22:04,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:04,110 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-11-23 20:22:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:04,181 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2019-11-23 20:22:04,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:22:04,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-23 20:22:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:04,183 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:22:04,183 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:22:04,185 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:22:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-11-23 20:22:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:22:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:22:04,191 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2019-11-23 20:22:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:04,191 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:22:04,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:22:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:22:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:22:04,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:04,193 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:04,193 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:04,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:04,194 INFO L82 PathProgramCache]: Analyzing trace with hash 241580185, now seen corresponding path program 1 times [2019-11-23 20:22:04,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:04,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942103024] [2019-11-23 20:22:04,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:22:04,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942103024] [2019-11-23 20:22:04,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906397336] [2019-11-23 20:22:04,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:04,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:22:04,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:22:04,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:04,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:22:04,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960682545] [2019-11-23 20:22:04,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:22:04,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:04,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:22:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:22:04,396 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2019-11-23 20:22:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:04,422 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-23 20:22:04,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:22:04,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-23 20:22:04,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:04,423 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:22:04,423 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:22:04,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:22:04,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:22:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-23 20:22:04,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:22:04,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-23 20:22:04,429 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2019-11-23 20:22:04,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:04,430 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-23 20:22:04,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:22:04,430 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-23 20:22:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:22:04,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:04,431 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:04,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:04,635 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:04,635 INFO L82 PathProgramCache]: Analyzing trace with hash 456751319, now seen corresponding path program 2 times [2019-11-23 20:22:04,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:04,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272675647] [2019-11-23 20:22:04,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:22:04,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272675647] [2019-11-23 20:22:04,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933169187] [2019-11-23 20:22:04,735 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:04,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:04,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:04,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:22:04,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:22:04,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:04,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:22:04,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30178310] [2019-11-23 20:22:04,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:22:04,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:04,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:22:04,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:22:04,825 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-11-23 20:22:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:04,968 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2019-11-23 20:22:04,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:22:04,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-11-23 20:22:04,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:04,970 INFO L225 Difference]: With dead ends: 57 [2019-11-23 20:22:04,970 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:22:04,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:22:04,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:22:04,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-11-23 20:22:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:22:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:22:04,977 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2019-11-23 20:22:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:04,978 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:22:04,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:22:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:22:04,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:22:04,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:04,979 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:05,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:05,184 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:05,184 INFO L82 PathProgramCache]: Analyzing trace with hash 391245135, now seen corresponding path program 3 times [2019-11-23 20:22:05,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:05,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808767215] [2019-11-23 20:22:05,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:22:05,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808767215] [2019-11-23 20:22:05,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380147757] [2019-11-23 20:22:05,269 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 [2019-11-23 20:22:05,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:22:05,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:05,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:22:05,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:22:05,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:05,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-23 20:22:05,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122583420] [2019-11-23 20:22:05,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:22:05,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:05,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:22:05,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:22:05,379 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2019-11-23 20:22:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:05,508 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 20:22:05,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:22:05,509 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-11-23 20:22:05,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:05,509 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:22:05,510 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:22:05,510 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:22:05,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:22:05,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 20:22:05,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:22:05,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 20:22:05,517 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 31 [2019-11-23 20:22:05,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:05,518 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 20:22:05,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:22:05,518 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 20:22:05,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:22:05,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:05,519 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:05,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:05,730 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:05,731 INFO L82 PathProgramCache]: Analyzing trace with hash -188495417, now seen corresponding path program 4 times [2019-11-23 20:22:05,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:05,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815900162] [2019-11-23 20:22:05,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 20:22:05,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815900162] [2019-11-23 20:22:05,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723613877] [2019-11-23 20:22:05,824 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 [2019-11-23 20:22:05,879 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:05,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:05,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:22:05,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 20:22:05,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:05,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:22:05,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494144167] [2019-11-23 20:22:05,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:22:05,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:05,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:22:05,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:22:05,897 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 7 states. [2019-11-23 20:22:05,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:05,982 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2019-11-23 20:22:05,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:22:05,982 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2019-11-23 20:22:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:05,983 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:22:05,983 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:22:05,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:22:05,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:22:05,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-23 20:22:05,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:22:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-11-23 20:22:05,991 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2019-11-23 20:22:05,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:05,992 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-11-23 20:22:05,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:22:05,992 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-11-23 20:22:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:22:05,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:05,993 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:06,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:06,205 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:06,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:06,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1009854465, now seen corresponding path program 5 times [2019-11-23 20:22:06,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:06,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878584982] [2019-11-23 20:22:06,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:22:06,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878584982] [2019-11-23 20:22:06,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865656026] [2019-11-23 20:22:06,347 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 [2019-11-23 20:22:07,624 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-23 20:22:07,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:07,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:22:07,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:22:07,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:07,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:22:07,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975948353] [2019-11-23 20:22:07,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:22:07,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:07,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:22:07,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:22:07,653 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 8 states. [2019-11-23 20:22:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:07,774 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2019-11-23 20:22:07,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:22:07,775 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2019-11-23 20:22:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:07,777 INFO L225 Difference]: With dead ends: 84 [2019-11-23 20:22:07,777 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:22:07,777 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:22:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:22:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-11-23 20:22:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:22:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-11-23 20:22:07,785 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 45 [2019-11-23 20:22:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:07,785 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-11-23 20:22:07,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:22:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-11-23 20:22:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:22:07,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:07,787 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:07,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:07,990 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:07,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:07,990 INFO L82 PathProgramCache]: Analyzing trace with hash 624767675, now seen corresponding path program 6 times [2019-11-23 20:22:07,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:07,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443661626] [2019-11-23 20:22:07,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 20:22:08,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443661626] [2019-11-23 20:22:08,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854909556] [2019-11-23 20:22:08,158 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 [2019-11-23 20:22:08,310 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-23 20:22:08,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:08,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:22:08,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:22:08,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:08,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2019-11-23 20:22:08,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388111722] [2019-11-23 20:22:08,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:22:08,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:08,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:22:08,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:22:08,389 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 13 states. [2019-11-23 20:22:08,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:08,523 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2019-11-23 20:22:08,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:22:08,524 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-23 20:22:08,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:08,525 INFO L225 Difference]: With dead ends: 109 [2019-11-23 20:22:08,525 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:22:08,526 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:22:08,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:22:08,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2019-11-23 20:22:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:22:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 20:22:08,532 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 51 [2019-11-23 20:22:08,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:08,533 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 20:22:08,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:22:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 20:22:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:22:08,535 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:08,535 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:08,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:08,747 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:08,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:08,748 INFO L82 PathProgramCache]: Analyzing trace with hash 256181043, now seen corresponding path program 7 times [2019-11-23 20:22:08,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:08,748 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192001973] [2019-11-23 20:22:08,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 20:22:08,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192001973] [2019-11-23 20:22:08,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557386625] [2019-11-23 20:22:08,832 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 [2019-11-23 20:22:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:08,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:22:08,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 20:22:08,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:08,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:22:08,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493475092] [2019-11-23 20:22:08,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:22:08,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:08,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:22:08,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:22:08,919 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 9 states. [2019-11-23 20:22:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:08,953 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2019-11-23 20:22:08,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:22:08,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2019-11-23 20:22:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:08,954 INFO L225 Difference]: With dead ends: 114 [2019-11-23 20:22:08,955 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:22:08,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:22:08,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:22:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:22:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:22:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 20:22:08,962 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 59 [2019-11-23 20:22:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:08,962 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 20:22:08,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:22:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 20:22:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:22:08,964 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:08,964 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:09,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:09,168 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:09,168 INFO L82 PathProgramCache]: Analyzing trace with hash -773577487, now seen corresponding path program 8 times [2019-11-23 20:22:09,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:09,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634066888] [2019-11-23 20:22:09,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 20:22:09,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634066888] [2019-11-23 20:22:09,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565574698] [2019-11-23 20:22:09,246 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:09,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:09,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:09,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:22:09,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 20:22:09,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:09,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:22:09,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356049002] [2019-11-23 20:22:09,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:22:09,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:09,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:22:09,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:22:09,332 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 10 states. [2019-11-23 20:22:09,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:09,374 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2019-11-23 20:22:09,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:22:09,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2019-11-23 20:22:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:09,375 INFO L225 Difference]: With dead ends: 116 [2019-11-23 20:22:09,375 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:22:09,376 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:22:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:22:09,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:22:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:22:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:22:09,382 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 61 [2019-11-23 20:22:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:09,382 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:22:09,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:22:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:22:09,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:22:09,384 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:09,384 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:09,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:09,595 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:09,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:09,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1765920559, now seen corresponding path program 9 times [2019-11-23 20:22:09,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:09,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97304415] [2019-11-23 20:22:09,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 20:22:09,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97304415] [2019-11-23 20:22:09,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182352181] [2019-11-23 20:22:09,694 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:10,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:22:10,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:10,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:22:10,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-23 20:22:10,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:10,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2019-11-23 20:22:10,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396949852] [2019-11-23 20:22:10,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:22:10,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:10,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:22:10,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:10,632 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 19 states. [2019-11-23 20:22:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:10,848 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2019-11-23 20:22:10,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:22:10,848 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2019-11-23 20:22:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:10,849 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:22:10,849 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 20:22:10,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 20:22:10,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-11-23 20:22:10,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:22:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 20:22:10,857 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 63 [2019-11-23 20:22:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:10,857 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 20:22:10,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:22:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 20:22:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:22:10,859 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:10,859 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:11,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:11,064 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:11,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash 495239649, now seen corresponding path program 10 times [2019-11-23 20:22:11,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:11,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156011009] [2019-11-23 20:22:11,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-23 20:22:11,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156011009] [2019-11-23 20:22:11,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166693258] [2019-11-23 20:22:11,181 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:11,252 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:11,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:11,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:22:11,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-23 20:22:11,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:11,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-11-23 20:22:11,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886535680] [2019-11-23 20:22:11,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:22:11,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:11,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:22:11,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:22:11,374 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 20:22:11,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:11,595 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2019-11-23 20:22:11,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:22:11,595 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2019-11-23 20:22:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:11,596 INFO L225 Difference]: With dead ends: 153 [2019-11-23 20:22:11,596 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 20:22:11,597 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:22:11,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 20:22:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2019-11-23 20:22:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:22:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 20:22:11,604 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 77 [2019-11-23 20:22:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:11,604 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 20:22:11,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:22:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 20:22:11,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:22:11,605 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:11,606 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:11,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:11,810 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:11,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:11,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1968319577, now seen corresponding path program 11 times [2019-11-23 20:22:11,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:11,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975865601] [2019-11-23 20:22:11,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-11-23 20:22:11,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975865601] [2019-11-23 20:22:11,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464722054] [2019-11-23 20:22:11,960 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