/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/loop-lit/gr2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:11:30,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:11:30,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:11:30,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:11:30,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:11:30,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:11:30,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:11:30,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:11:30,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:11:30,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:11:30,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:11:30,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:11:30,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:11:30,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:11:30,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:11:30,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:11:30,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:11:30,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:11:30,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:11:30,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:11:30,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:11:30,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:11:30,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:11:30,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:11:30,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 22:11:30,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 22:11:30,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 22:11:30,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 22:11:30,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 22:11:30,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 22:11:30,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:11:30,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:11:30,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:11:30,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:11:30,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:11:30,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:11:30,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:11:30,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:11:30,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:11:30,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:11:30,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:11:30,540 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 22:11:30,560 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:11:30,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:11:30,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:11:30,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:11:30,563 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:11:30,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:11:30,563 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:11:30,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:11:30,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:11:30,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:11:30,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:11:30,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:11:30,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:11:30,565 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:11:30,566 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:11:30,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:11:30,566 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:11:30,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:11:30,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:11:30,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:11:30,567 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:11:30,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:11:30,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:11:30,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:11:30,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:11:30,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:11:30,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:11:30,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:11:30,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:11:30,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:11:30,841 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:11:30,854 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:11:30,858 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:11:30,859 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:11:30,859 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:11:30,860 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gr2006.i [2019-11-23 22:11:30,920 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33f2eb22b/086c29f211e64a2aa66ded7526b49143/FLAG9ea5198a7 [2019-11-23 22:11:31,344 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:11:31,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i [2019-11-23 22:11:31,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33f2eb22b/086c29f211e64a2aa66ded7526b49143/FLAG9ea5198a7 [2019-11-23 22:11:31,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33f2eb22b/086c29f211e64a2aa66ded7526b49143 [2019-11-23 22:11:31,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:11:31,754 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:11:31,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:11:31,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:11:31,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:11:31,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:11:31" (1/1) ... [2019-11-23 22:11:31,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64971526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:31, skipping insertion in model container [2019-11-23 22:11:31,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:11:31" (1/1) ... [2019-11-23 22:11:31,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:11:31,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:11:31,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:11:31,979 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:11:31,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:11:32,007 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:11:32,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:32 WrapperNode [2019-11-23 22:11:32,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:11:32,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:11:32,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:11:32,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:11:32,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:32" (1/1) ... [2019-11-23 22:11:32,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:32" (1/1) ... [2019-11-23 22:11:32,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:11:32,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:11:32,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:11:32,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:11:32,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:32" (1/1) ... [2019-11-23 22:11:32,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:32" (1/1) ... [2019-11-23 22:11:32,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:32" (1/1) ... [2019-11-23 22:11:32,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:32" (1/1) ... [2019-11-23 22:11:32,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:32" (1/1) ... [2019-11-23 22:11:32,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:32" (1/1) ... [2019-11-23 22:11:32,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:32" (1/1) ... [2019-11-23 22:11:32,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:11:32,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:11:32,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:11:32,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:11:32,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:32" (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 22:11:32,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:11:32,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:11:32,358 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:11:32,359 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 22:11:32,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:11:32 BoogieIcfgContainer [2019-11-23 22:11:32,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:11:32,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:11:32,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:11:32,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:11:32,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:11:31" (1/3) ... [2019-11-23 22:11:32,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d1de49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:11:32, skipping insertion in model container [2019-11-23 22:11:32,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:32" (2/3) ... [2019-11-23 22:11:32,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d1de49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:11:32, skipping insertion in model container [2019-11-23 22:11:32,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:11:32" (3/3) ... [2019-11-23 22:11:32,368 INFO L109 eAbstractionObserver]: Analyzing ICFG gr2006.i [2019-11-23 22:11:32,377 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:11:32,384 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:11:32,395 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:11:32,419 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:11:32,420 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:11:32,420 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:11:32,420 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:11:32,420 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:11:32,421 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:11:32,421 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:11:32,421 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:11:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-23 22:11:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-23 22:11:32,437 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:32,438 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-23 22:11:32,438 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:32,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:32,444 INFO L82 PathProgramCache]: Analyzing trace with hash 30262788, now seen corresponding path program 1 times [2019-11-23 22:11:32,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:32,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751120002] [2019-11-23 22:11:32,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:32,554 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 22:11:32,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751120002] [2019-11-23 22:11:32,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:11:32,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:11:32,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820204786] [2019-11-23 22:11:32,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:11:32,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:32,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:11:32,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:11:32,577 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-11-23 22:11:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:32,594 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2019-11-23 22:11:32,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:11:32,596 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-23 22:11:32,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:32,606 INFO L225 Difference]: With dead ends: 20 [2019-11-23 22:11:32,606 INFO L226 Difference]: Without dead ends: 8 [2019-11-23 22:11:32,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:11:32,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-23 22:11:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-23 22:11:32,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-23 22:11:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-23 22:11:32,649 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-11-23 22:11:32,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:32,649 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-23 22:11:32,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:11:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-23 22:11:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:11:32,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:32,651 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:32,651 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:32,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:32,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1365765045, now seen corresponding path program 1 times [2019-11-23 22:11:32,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:32,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338083853] [2019-11-23 22:11:32,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:32,792 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 22:11:32,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338083853] [2019-11-23 22:11:32,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:11:32,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:11:32,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839309486] [2019-11-23 22:11:32,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:11:32,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:32,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:11:32,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:11:32,796 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-11-23 22:11:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:32,846 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2019-11-23 22:11:32,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:11:32,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 22:11:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:32,848 INFO L225 Difference]: With dead ends: 16 [2019-11-23 22:11:32,849 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:11:32,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:11:32,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:11:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 22:11:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:11:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 22:11:32,854 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2019-11-23 22:11:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:32,855 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 22:11:32,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:11:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 22:11:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:11:32,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:32,856 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:32,857 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:32,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:32,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1363918003, now seen corresponding path program 1 times [2019-11-23 22:11:32,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:32,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209220235] [2019-11-23 22:11:32,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:32,903 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 22:11:32,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209220235] [2019-11-23 22:11:32,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:11:32,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:11:32,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980415120] [2019-11-23 22:11:32,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:11:32,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:32,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:11:32,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:11:32,907 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2019-11-23 22:11:32,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:32,924 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-11-23 22:11:32,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:11:32,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 22:11:32,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:32,926 INFO L225 Difference]: With dead ends: 26 [2019-11-23 22:11:32,926 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:11:32,926 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 22:11:32,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:11:32,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-23 22:11:32,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 22:11:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-23 22:11:32,931 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2019-11-23 22:11:32,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:32,931 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-23 22:11:32,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:11:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-23 22:11:32,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:11:32,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:32,934 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:32,935 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:32,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:32,935 INFO L82 PathProgramCache]: Analyzing trace with hash 10637259, now seen corresponding path program 1 times [2019-11-23 22:11:32,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:32,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014818447] [2019-11-23 22:11:32,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:11:32,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014818447] [2019-11-23 22:11:32,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772461323] [2019-11-23 22:11:32,980 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 22:11:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:33,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:11:33,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:11:33,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:33,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-23 22:11:33,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782802913] [2019-11-23 22:11:33,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:11:33,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:11:33,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:11:33,055 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-23 22:11:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:33,101 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-11-23 22:11:33,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:11:33,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 22:11:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:33,103 INFO L225 Difference]: With dead ends: 29 [2019-11-23 22:11:33,103 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:11:33,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:11:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:11:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-23 22:11:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:11:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-23 22:11:33,113 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2019-11-23 22:11:33,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:33,113 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-23 22:11:33,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:11:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-23 22:11:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:11:33,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:33,115 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2019-11-23 22:11:33,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:33,317 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash -300800067, now seen corresponding path program 2 times [2019-11-23 22:11:33,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:33,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018354903] [2019-11-23 22:11:33,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:11:33,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018354903] [2019-11-23 22:11:33,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902641622] [2019-11-23 22:11:33,421 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 22:11:33,465 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:11:33,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:33,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:11:33,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:11:33,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:33,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2019-11-23 22:11:33,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841742448] [2019-11-23 22:11:33,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:11:33,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:33,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:11:33,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:11:33,525 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 9 states. [2019-11-23 22:11:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:33,741 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2019-11-23 22:11:33,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:11:33,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-23 22:11:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:33,742 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:11:33,743 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:11:33,744 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:11:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:11:33,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-11-23 22:11:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:11:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-23 22:11:33,751 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2019-11-23 22:11:33,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:33,752 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-23 22:11:33,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:11:33,752 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-23 22:11:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:11:33,753 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:33,753 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 1, 1, 1, 1, 1] [2019-11-23 22:11:33,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:33,957 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:33,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:33,958 INFO L82 PathProgramCache]: Analyzing trace with hash 499970687, now seen corresponding path program 3 times [2019-11-23 22:11:33,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:33,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483505634] [2019-11-23 22:11:33,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:11:34,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483505634] [2019-11-23 22:11:34,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456844420] [2019-11-23 22:11:34,072 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 22:11:34,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:11:34,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:34,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:11:34,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:11:34,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:34,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2019-11-23 22:11:34,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266949089] [2019-11-23 22:11:34,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:11:34,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:34,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:11:34,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:11:34,172 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 11 states. [2019-11-23 22:11:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:34,364 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2019-11-23 22:11:34,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:11:34,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-11-23 22:11:34,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:34,368 INFO L225 Difference]: With dead ends: 75 [2019-11-23 22:11:34,368 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 22:11:34,369 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:11:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 22:11:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2019-11-23 22:11:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 22:11:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-11-23 22:11:34,378 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 22 [2019-11-23 22:11:34,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:34,378 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-11-23 22:11:34,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:11:34,378 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-11-23 22:11:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:11:34,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:34,380 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 8, 3, 1, 1, 1, 1, 1] [2019-11-23 22:11:34,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:34,584 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:34,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:34,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1791970037, now seen corresponding path program 4 times [2019-11-23 22:11:34,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:34,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227593635] [2019-11-23 22:11:34,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 81 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:34,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227593635] [2019-11-23 22:11:34,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652412092] [2019-11-23 22:11:34,817 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 22:11:34,853 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:11:34,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:34,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:11:34,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 80 proven. 15 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:11:34,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:34,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 19 [2019-11-23 22:11:34,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685946487] [2019-11-23 22:11:34,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:11:34,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:34,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:11:34,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:11:34,925 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 20 states. [2019-11-23 22:11:35,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:35,066 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2019-11-23 22:11:35,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:11:35,067 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2019-11-23 22:11:35,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:35,068 INFO L225 Difference]: With dead ends: 71 [2019-11-23 22:11:35,068 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:11:35,069 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:11:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:11:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-23 22:11:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:11:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2019-11-23 22:11:35,078 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 37 [2019-11-23 22:11:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:35,079 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2019-11-23 22:11:35,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:11:35,079 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2019-11-23 22:11:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 22:11:35,080 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:35,080 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 8, 4, 1, 1, 1, 1, 1] [2019-11-23 22:11:35,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:35,289 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:35,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:35,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1811175165, now seen corresponding path program 5 times [2019-11-23 22:11:35,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:35,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298903341] [2019-11-23 22:11:35,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 84 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:35,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298903341] [2019-11-23 22:11:35,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173873771] [2019-11-23 22:11:35,549 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 22:11:35,593 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:11:35,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:35,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:11:35,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 102 proven. 26 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:11:35,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:35,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 22 [2019-11-23 22:11:35,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522557753] [2019-11-23 22:11:35,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:11:35,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:35,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:11:35,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:11:35,699 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 23 states. [2019-11-23 22:11:35,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:35,866 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions. [2019-11-23 22:11:35,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:11:35,867 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2019-11-23 22:11:35,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:35,867 INFO L225 Difference]: With dead ends: 74 [2019-11-23 22:11:35,867 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 22:11:35,869 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:11:35,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 22:11:35,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-23 22:11:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 22:11:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2019-11-23 22:11:35,875 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 40 [2019-11-23 22:11:35,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:35,875 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2019-11-23 22:11:35,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:11:35,875 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2019-11-23 22:11:35,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 22:11:35,876 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:35,877 INFO L410 BasicCegarLoop]: trace histogram [13, 12, 8, 5, 1, 1, 1, 1, 1] [2019-11-23 22:11:36,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:36,081 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:36,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:36,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1007740981, now seen corresponding path program 6 times [2019-11-23 22:11:36,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:36,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019096105] [2019-11-23 22:11:36,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 87 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:36,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019096105] [2019-11-23 22:11:36,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099324542] [2019-11-23 22:11:36,313 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 22:11:36,350 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:11:36,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:36,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:11:36,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 124 proven. 40 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:11:36,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:36,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 25 [2019-11-23 22:11:36,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962837422] [2019-11-23 22:11:36,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:11:36,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:36,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:11:36,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:11:36,454 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 26 states. [2019-11-23 22:11:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:36,680 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2019-11-23 22:11:36,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:11:36,680 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 43 [2019-11-23 22:11:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:36,681 INFO L225 Difference]: With dead ends: 77 [2019-11-23 22:11:36,681 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 22:11:36,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:11:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 22:11:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-11-23 22:11:36,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 22:11:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-11-23 22:11:36,689 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 43 [2019-11-23 22:11:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:36,690 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-11-23 22:11:36,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 22:11:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-11-23 22:11:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:11:36,691 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:36,691 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 8, 6, 1, 1, 1, 1, 1] [2019-11-23 22:11:36,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:36,902 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:36,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:36,902 INFO L82 PathProgramCache]: Analyzing trace with hash 156892221, now seen corresponding path program 7 times [2019-11-23 22:11:36,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:36,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345191551] [2019-11-23 22:11:36,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 90 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:37,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345191551] [2019-11-23 22:11:37,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718466608] [2019-11-23 22:11:37,167 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 22:11:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:37,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:11:37,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 146 proven. 57 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:11:37,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:37,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 28 [2019-11-23 22:11:37,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766543484] [2019-11-23 22:11:37,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:11:37,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:37,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:11:37,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:11:37,353 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 29 states. [2019-11-23 22:11:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:37,625 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2019-11-23 22:11:37,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:11:37,626 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2019-11-23 22:11:37,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:37,627 INFO L225 Difference]: With dead ends: 80 [2019-11-23 22:11:37,627 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 22:11:37,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:11:37,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 22:11:37,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-23 22:11:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:11:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2019-11-23 22:11:37,635 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 46 [2019-11-23 22:11:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:37,635 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2019-11-23 22:11:37,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:11:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2019-11-23 22:11:37,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:11:37,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:37,636 INFO L410 BasicCegarLoop]: trace histogram [15, 14, 8, 7, 1, 1, 1, 1, 1] [2019-11-23 22:11:37,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:37,842 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:37,842 INFO L82 PathProgramCache]: Analyzing trace with hash 998795915, now seen corresponding path program 8 times [2019-11-23 22:11:37,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:37,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843818111] [2019-11-23 22:11:37,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 168 proven. 77 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:11:37,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843818111] [2019-11-23 22:11:37,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306154956] [2019-11-23 22:11:37,919 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 22:11:37,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:11:37,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:37,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:11:37,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 168 proven. 77 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:11:37,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:37,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-23 22:11:37,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253989263] [2019-11-23 22:11:37,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:11:37,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:37,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:11:37,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:11:37,970 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 10 states. [2019-11-23 22:11:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:38,013 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2019-11-23 22:11:38,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:11:38,014 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2019-11-23 22:11:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:38,015 INFO L225 Difference]: With dead ends: 83 [2019-11-23 22:11:38,015 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:11:38,016 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:11:38,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:11:38,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-23 22:11:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:11:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-11-23 22:11:38,021 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 49 [2019-11-23 22:11:38,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:38,022 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-11-23 22:11:38,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:11:38,022 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-11-23 22:11:38,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:11:38,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:38,023 INFO L410 BasicCegarLoop]: trace histogram [16, 15, 8, 8, 1, 1, 1, 1, 1] [2019-11-23 22:11:38,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:38,235 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:38,236 INFO L82 PathProgramCache]: Analyzing trace with hash -457264771, now seen corresponding path program 9 times [2019-11-23 22:11:38,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:38,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442696970] [2019-11-23 22:11:38,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:11:38,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442696970] [2019-11-23 22:11:38,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396960652] [2019-11-23 22:11:38,359 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 22:11:38,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 22:11:38,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:38,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:11:38,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 177 proven. 162 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 22:11:38,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:38,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2019-11-23 22:11:38,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769778228] [2019-11-23 22:11:38,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:11:38,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:38,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:11:38,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:11:38,531 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 21 states. [2019-11-23 22:11:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:38,975 INFO L93 Difference]: Finished difference Result 225 states and 297 transitions. [2019-11-23 22:11:38,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:11:38,975 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2019-11-23 22:11:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:38,977 INFO L225 Difference]: With dead ends: 225 [2019-11-23 22:11:38,977 INFO L226 Difference]: Without dead ends: 221 [2019-11-23 22:11:38,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:11:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-11-23 22:11:38,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 83. [2019-11-23 22:11:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 22:11:38,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2019-11-23 22:11:38,989 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 52 [2019-11-23 22:11:38,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:38,989 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2019-11-23 22:11:38,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:11:38,989 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2019-11-23 22:11:38,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 22:11:38,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:38,991 INFO L410 BasicCegarLoop]: trace histogram [26, 25, 18, 8, 1, 1, 1, 1, 1] [2019-11-23 22:11:39,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:39,194 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:39,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1075705725, now seen corresponding path program 10 times [2019-11-23 22:11:39,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:39,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833357927] [2019-11-23 22:11:39,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 451 proven. 524 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:39,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833357927] [2019-11-23 22:11:39,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188087560] [2019-11-23 22:11:39,712 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 22:11:39,754 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:11:39,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:39,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:11:39,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 450 proven. 100 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 22:11:39,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:39,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 10] total 44 [2019-11-23 22:11:39,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488460444] [2019-11-23 22:11:39,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 22:11:39,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:39,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 22:11:39,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1585, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:11:39,993 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 45 states. [2019-11-23 22:11:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:40,348 INFO L93 Difference]: Finished difference Result 146 states and 183 transitions. [2019-11-23 22:11:40,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:11:40,348 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 82 [2019-11-23 22:11:40,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:40,349 INFO L225 Difference]: With dead ends: 146 [2019-11-23 22:11:40,349 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 22:11:40,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=807, Invalid=2975, Unknown=0, NotChecked=0, Total=3782 [2019-11-23 22:11:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 22:11:40,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 22:11:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 22:11:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2019-11-23 22:11:40,371 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 82 [2019-11-23 22:11:40,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:40,371 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2019-11-23 22:11:40,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 22:11:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2019-11-23 22:11:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 22:11:40,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:40,375 INFO L410 BasicCegarLoop]: trace histogram [27, 26, 18, 9, 1, 1, 1, 1, 1] [2019-11-23 22:11:40,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:40,581 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:40,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1924147509, now seen corresponding path program 11 times [2019-11-23 22:11:40,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:40,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978675225] [2019-11-23 22:11:40,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 454 proven. 599 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:41,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978675225] [2019-11-23 22:11:41,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89286533] [2019-11-23 22:11:41,161 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:41,228 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2019-11-23 22:11:41,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:41,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:11:41,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 502 proven. 126 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 22:11:41,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:41,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 11] total 47 [2019-11-23 22:11:41,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683849252] [2019-11-23 22:11:41,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 22:11:41,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:41,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 22:11:41,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 22:11:41,537 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand 48 states. [2019-11-23 22:11:41,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:41,940 INFO L93 Difference]: Finished difference Result 149 states and 186 transitions. [2019-11-23 22:11:41,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:11:41,941 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 85 [2019-11-23 22:11:41,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:41,942 INFO L225 Difference]: With dead ends: 149 [2019-11-23 22:11:41,943 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 22:11:41,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=953, Invalid=3469, Unknown=0, NotChecked=0, Total=4422 [2019-11-23 22:11:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 22:11:41,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-23 22:11:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 22:11:41,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2019-11-23 22:11:41,951 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 85 [2019-11-23 22:11:41,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:41,951 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2019-11-23 22:11:41,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 22:11:41,951 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2019-11-23 22:11:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 22:11:41,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:41,953 INFO L410 BasicCegarLoop]: trace histogram [28, 27, 18, 10, 1, 1, 1, 1, 1] [2019-11-23 22:11:42,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:42,158 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:42,159 INFO L82 PathProgramCache]: Analyzing trace with hash -872346435, now seen corresponding path program 12 times [2019-11-23 22:11:42,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:42,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110391787] [2019-11-23 22:11:42,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 457 proven. 677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:42,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110391787] [2019-11-23 22:11:42,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37413863] [2019-11-23 22:11:42,793 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:42,868 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-11-23 22:11:42,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:42,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:11:42,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 554 proven. 155 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 22:11:43,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:43,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 12] total 50 [2019-11-23 22:11:43,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891558139] [2019-11-23 22:11:43,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 22:11:43,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:43,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 22:11:43,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=2050, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:11:43,141 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand 51 states. [2019-11-23 22:11:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:43,647 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2019-11-23 22:11:43,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:11:43,648 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 88 [2019-11-23 22:11:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:43,649 INFO L225 Difference]: With dead ends: 152 [2019-11-23 22:11:43,649 INFO L226 Difference]: Without dead ends: 93 [2019-11-23 22:11:43,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1114, Invalid=3998, Unknown=0, NotChecked=0, Total=5112 [2019-11-23 22:11:43,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-23 22:11:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2019-11-23 22:11:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 22:11:43,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2019-11-23 22:11:43,658 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 88 [2019-11-23 22:11:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:43,658 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2019-11-23 22:11:43,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 22:11:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2019-11-23 22:11:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 22:11:43,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:43,660 INFO L410 BasicCegarLoop]: trace histogram [29, 28, 18, 11, 1, 1, 1, 1, 1] [2019-11-23 22:11:43,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:43,870 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:43,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:43,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1547024779, now seen corresponding path program 13 times [2019-11-23 22:11:43,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:43,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454874493] [2019-11-23 22:11:43,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 460 proven. 758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:44,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454874493] [2019-11-23 22:11:44,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683909708] [2019-11-23 22:11:44,459 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:44,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:11:44,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 606 proven. 187 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 22:11:44,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:44,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 53 [2019-11-23 22:11:44,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74957919] [2019-11-23 22:11:44,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-23 22:11:44,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:44,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-23 22:11:44,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=2302, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 22:11:44,795 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 54 states. [2019-11-23 22:11:45,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:45,370 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2019-11-23 22:11:45,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:11:45,371 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 91 [2019-11-23 22:11:45,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:45,372 INFO L225 Difference]: With dead ends: 155 [2019-11-23 22:11:45,372 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 22:11:45,375 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1290, Invalid=4562, Unknown=0, NotChecked=0, Total=5852 [2019-11-23 22:11:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 22:11:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-11-23 22:11:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 22:11:45,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2019-11-23 22:11:45,380 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 91 [2019-11-23 22:11:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:45,381 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2019-11-23 22:11:45,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-23 22:11:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2019-11-23 22:11:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 22:11:45,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:45,382 INFO L410 BasicCegarLoop]: trace histogram [30, 29, 18, 12, 1, 1, 1, 1, 1] [2019-11-23 22:11:45,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:45,585 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:45,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:45,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1106300419, now seen corresponding path program 14 times [2019-11-23 22:11:45,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:45,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150682462] [2019-11-23 22:11:45,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 463 proven. 842 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:46,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150682462] [2019-11-23 22:11:46,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657414810] [2019-11-23 22:11:46,248 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:46,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:11:46,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:46,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:11:46,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 658 proven. 222 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 22:11:46,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:46,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 14] total 56 [2019-11-23 22:11:46,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866579320] [2019-11-23 22:11:46,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-23 22:11:46,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:46,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-23 22:11:46,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=625, Invalid=2567, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:11:46,640 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand 57 states. [2019-11-23 22:11:47,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:47,276 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2019-11-23 22:11:47,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:11:47,276 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 94 [2019-11-23 22:11:47,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:47,277 INFO L225 Difference]: With dead ends: 158 [2019-11-23 22:11:47,277 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 22:11:47,281 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1481, Invalid=5161, Unknown=0, NotChecked=0, Total=6642 [2019-11-23 22:11:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 22:11:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-11-23 22:11:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 22:11:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2019-11-23 22:11:47,289 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 94 [2019-11-23 22:11:47,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:47,289 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2019-11-23 22:11:47,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-23 22:11:47,289 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2019-11-23 22:11:47,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 22:11:47,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:47,290 INFO L410 BasicCegarLoop]: trace histogram [31, 30, 18, 13, 1, 1, 1, 1, 1] [2019-11-23 22:11:47,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:47,494 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:47,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1739158453, now seen corresponding path program 15 times [2019-11-23 22:11:47,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:47,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829190073] [2019-11-23 22:11:47,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 466 proven. 929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:48,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829190073] [2019-11-23 22:11:48,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302049416] [2019-11-23 22:11:48,196 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:48,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2019-11-23 22:11:48,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:48,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 22:11:48,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 875 proven. 482 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 22:11:48,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:48,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 19] total 63 [2019-11-23 22:11:48,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042848255] [2019-11-23 22:11:48,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-11-23 22:11:48,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:48,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-11-23 22:11:48,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1071, Invalid=2961, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 22:11:48,711 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 64 states. [2019-11-23 22:11:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:49,438 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2019-11-23 22:11:49,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:11:49,443 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 97 [2019-11-23 22:11:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:49,444 INFO L225 Difference]: With dead ends: 161 [2019-11-23 22:11:49,444 INFO L226 Difference]: Without dead ends: 101 [2019-11-23 22:11:49,447 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2521 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2075, Invalid=6297, Unknown=0, NotChecked=0, Total=8372 [2019-11-23 22:11:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-23 22:11:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-11-23 22:11:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 22:11:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2019-11-23 22:11:49,452 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 97 [2019-11-23 22:11:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:49,452 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2019-11-23 22:11:49,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-11-23 22:11:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2019-11-23 22:11:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 22:11:49,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:49,453 INFO L410 BasicCegarLoop]: trace histogram [32, 31, 18, 14, 1, 1, 1, 1, 1] [2019-11-23 22:11:49,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:49,654 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:49,654 INFO L82 PathProgramCache]: Analyzing trace with hash -306419907, now seen corresponding path program 16 times [2019-11-23 22:11:49,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:49,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480716677] [2019-11-23 22:11:49,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 469 proven. 1019 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:50,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480716677] [2019-11-23 22:11:50,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067290660] [2019-11-23 22:11:50,421 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:50,463 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:11:50,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:50,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:11:50,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 762 proven. 301 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 22:11:50,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:50,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 16] total 62 [2019-11-23 22:11:50,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619449690] [2019-11-23 22:11:50,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-11-23 22:11:50,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:50,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-11-23 22:11:50,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=3136, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 22:11:50,854 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand 63 states. [2019-11-23 22:11:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:51,599 INFO L93 Difference]: Finished difference Result 164 states and 201 transitions. [2019-11-23 22:11:51,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:11:51,600 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 100 [2019-11-23 22:11:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:51,601 INFO L225 Difference]: With dead ends: 164 [2019-11-23 22:11:51,601 INFO L226 Difference]: Without dead ends: 105 [2019-11-23 22:11:51,603 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1908, Invalid=6464, Unknown=0, NotChecked=0, Total=8372 [2019-11-23 22:11:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-23 22:11:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-11-23 22:11:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 22:11:51,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2019-11-23 22:11:51,609 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 100 [2019-11-23 22:11:51,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:51,609 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2019-11-23 22:11:51,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-11-23 22:11:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2019-11-23 22:11:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-23 22:11:51,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:51,610 INFO L410 BasicCegarLoop]: trace histogram [33, 32, 18, 15, 1, 1, 1, 1, 1] [2019-11-23 22:11:51,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:51,811 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:51,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:51,811 INFO L82 PathProgramCache]: Analyzing trace with hash -977383669, now seen corresponding path program 17 times [2019-11-23 22:11:51,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:51,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936541472] [2019-11-23 22:11:51,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 472 proven. 1112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:52,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936541472] [2019-11-23 22:11:52,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221694896] [2019-11-23 22:11:52,763 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:52,824 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2019-11-23 22:11:52,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:52,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:11:52,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 814 proven. 345 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 22:11:53,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:53,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 17] total 65 [2019-11-23 22:11:53,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778705644] [2019-11-23 22:11:53,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-11-23 22:11:53,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:53,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-11-23 22:11:53,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=850, Invalid=3440, Unknown=0, NotChecked=0, Total=4290 [2019-11-23 22:11:53,265 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand 66 states. [2019-11-23 22:11:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:54,167 INFO L93 Difference]: Finished difference Result 167 states and 204 transitions. [2019-11-23 22:11:54,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:11:54,168 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 103 [2019-11-23 22:11:54,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:54,169 INFO L225 Difference]: With dead ends: 167 [2019-11-23 22:11:54,169 INFO L226 Difference]: Without dead ends: 108 [2019-11-23 22:11:54,170 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2207 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2144, Invalid=7168, Unknown=0, NotChecked=0, Total=9312 [2019-11-23 22:11:54,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-23 22:11:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-23 22:11:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-23 22:11:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2019-11-23 22:11:54,175 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 103 [2019-11-23 22:11:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:54,176 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2019-11-23 22:11:54,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-11-23 22:11:54,176 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2019-11-23 22:11:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-23 22:11:54,176 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:54,177 INFO L410 BasicCegarLoop]: trace histogram [34, 33, 18, 16, 1, 1, 1, 1, 1] [2019-11-23 22:11:54,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:54,380 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:54,380 INFO L82 PathProgramCache]: Analyzing trace with hash -881021827, now seen corresponding path program 18 times [2019-11-23 22:11:54,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:54,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485286164] [2019-11-23 22:11:54,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 475 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:55,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485286164] [2019-11-23 22:11:55,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032603353] [2019-11-23 22:11:55,300 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:55,358 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2019-11-23 22:11:55,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:55,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:11:55,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 866 proven. 392 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 22:11:55,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:55,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 18] total 68 [2019-11-23 22:11:55,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065730344] [2019-11-23 22:11:55,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-11-23 22:11:55,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:55,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-11-23 22:11:55,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=935, Invalid=3757, Unknown=0, NotChecked=0, Total=4692 [2019-11-23 22:11:55,830 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand 69 states. [2019-11-23 22:11:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:56,767 INFO L93 Difference]: Finished difference Result 170 states and 207 transitions. [2019-11-23 22:11:56,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:11:56,767 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 106 [2019-11-23 22:11:56,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:56,768 INFO L225 Difference]: With dead ends: 170 [2019-11-23 22:11:56,768 INFO L226 Difference]: Without dead ends: 111 [2019-11-23 22:11:56,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2395, Invalid=7907, Unknown=0, NotChecked=0, Total=10302 [2019-11-23 22:11:56,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-23 22:11:56,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2019-11-23 22:11:56,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-23 22:11:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2019-11-23 22:11:56,774 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 106 [2019-11-23 22:11:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:56,775 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2019-11-23 22:11:56,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-11-23 22:11:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2019-11-23 22:11:56,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 22:11:56,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:56,776 INFO L410 BasicCegarLoop]: trace histogram [35, 34, 18, 17, 1, 1, 1, 1, 1] [2019-11-23 22:11:56,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:56,979 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:56,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:56,980 INFO L82 PathProgramCache]: Analyzing trace with hash 796459467, now seen corresponding path program 19 times [2019-11-23 22:11:56,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:56,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613288025] [2019-11-23 22:11:56,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 918 proven. 442 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 22:11:57,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613288025] [2019-11-23 22:11:57,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094039747] [2019-11-23 22:11:57,200 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:57,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:11:57,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 918 proven. 442 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 22:11:57,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:57,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2019-11-23 22:11:57,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108905176] [2019-11-23 22:11:57,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:11:57,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:57,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:11:57,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:11:57,283 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand 20 states. [2019-11-23 22:11:57,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:57,356 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2019-11-23 22:11:57,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:11:57,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2019-11-23 22:11:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:57,360 INFO L225 Difference]: With dead ends: 173 [2019-11-23 22:11:57,360 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 22:11:57,361 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:11:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 22:11:57,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2019-11-23 22:11:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-23 22:11:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2019-11-23 22:11:57,366 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 109 [2019-11-23 22:11:57,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:57,367 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2019-11-23 22:11:57,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:11:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2019-11-23 22:11:57,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-23 22:11:57,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:57,368 INFO L410 BasicCegarLoop]: trace histogram [36, 35, 18, 18, 1, 1, 1, 1, 1] [2019-11-23 22:11:57,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:57,571 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:57,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:57,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1597767235, now seen corresponding path program 20 times [2019-11-23 22:11:57,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:57,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950243972] [2019-11-23 22:11:57,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1395 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-23 22:11:57,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950243972] [2019-11-23 22:11:57,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681196971] [2019-11-23 22:11:57,821 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:57,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:11:57,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:57,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:11:57,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 970 proven. 495 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 22:11:58,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:58,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2019-11-23 22:11:58,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113227488] [2019-11-23 22:11:58,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 22:11:58,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:58,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 22:11:58,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:11:58,199 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand 41 states. [2019-11-23 22:11:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:59,265 INFO L93 Difference]: Finished difference Result 488 states and 635 transitions. [2019-11-23 22:11:59,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-11-23 22:11:59,265 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 112 [2019-11-23 22:11:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:59,267 INFO L225 Difference]: With dead ends: 488 [2019-11-23 22:11:59,267 INFO L226 Difference]: Without dead ends: 429 [2019-11-23 22:11:59,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1493, Invalid=4987, Unknown=0, NotChecked=0, Total=6480 [2019-11-23 22:11:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2019-11-23 22:11:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 146. [2019-11-23 22:11:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 22:11:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 174 transitions. [2019-11-23 22:11:59,279 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 174 transitions. Word has length 112 [2019-11-23 22:11:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:59,279 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 174 transitions. [2019-11-23 22:11:59,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 22:11:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 174 transitions. [2019-11-23 22:11:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-23 22:11:59,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:59,280 INFO L410 BasicCegarLoop]: trace histogram [38, 37, 19, 19, 1, 1, 1, 1, 1] [2019-11-23 22:11:59,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:59,490 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:59,491 INFO L82 PathProgramCache]: Analyzing trace with hash -244187009, now seen corresponding path program 21 times [2019-11-23 22:11:59,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:59,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889815610] [2019-11-23 22:11:59,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 1558 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-23 22:11:59,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889815610] [2019-11-23 22:11:59,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104207016] [2019-11-23 22:11:59,795 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:59,862 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2019-11-23 22:11:59,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:59,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 22:11:59,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 1046 proven. 1009 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-23 22:12:00,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:00,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2019-11-23 22:12:00,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483441142] [2019-11-23 22:12:00,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:12:00,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:00,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:12:00,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:12:00,318 INFO L87 Difference]: Start difference. First operand 146 states and 174 transitions. Second operand 43 states. [2019-11-23 22:12:01,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:01,541 INFO L93 Difference]: Finished difference Result 914 states and 1216 transitions. [2019-11-23 22:12:01,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-11-23 22:12:01,542 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 118 [2019-11-23 22:12:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:01,546 INFO L225 Difference]: With dead ends: 914 [2019-11-23 22:12:01,546 INFO L226 Difference]: Without dead ends: 910 [2019-11-23 22:12:01,547 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2095, Invalid=4877, Unknown=0, NotChecked=0, Total=6972 [2019-11-23 22:12:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2019-11-23 22:12:01,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 182. [2019-11-23 22:12:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-11-23 22:12:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 222 transitions. [2019-11-23 22:12:01,563 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 222 transitions. Word has length 118 [2019-11-23 22:12:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:01,564 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 222 transitions. [2019-11-23 22:12:01,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:12:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 222 transitions. [2019-11-23 22:12:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-23 22:12:01,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:01,566 INFO L410 BasicCegarLoop]: trace histogram [59, 58, 40, 19, 1, 1, 1, 1, 1] [2019-11-23 22:12:01,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:01,770 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:01,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:01,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1086178059, now seen corresponding path program 22 times [2019-11-23 22:12:01,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:01,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486618154] [2019-11-23 22:12:01,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 2321 proven. 2812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:03,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486618154] [2019-11-23 22:12:03,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505371211] [2019-11-23 22:12:03,976 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:04,050 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:04,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:04,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:12:04,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 2320 proven. 551 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-23 22:12:04,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:04,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 21] total 99 [2019-11-23 22:12:04,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043954629] [2019-11-23 22:12:04,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-11-23 22:12:04,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:04,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-11-23 22:12:04,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1869, Invalid=8031, Unknown=0, NotChecked=0, Total=9900 [2019-11-23 22:12:04,820 INFO L87 Difference]: Start difference. First operand 182 states and 222 transitions. Second operand 100 states. [2019-11-23 22:12:06,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:06,136 INFO L93 Difference]: Finished difference Result 311 states and 392 transitions. [2019-11-23 22:12:06,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:12:06,137 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 181 [2019-11-23 22:12:06,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:06,138 INFO L225 Difference]: With dead ends: 311 [2019-11-23 22:12:06,138 INFO L226 Difference]: Without dead ends: 186 [2019-11-23 22:12:06,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5225 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3887, Invalid=15295, Unknown=0, NotChecked=0, Total=19182 [2019-11-23 22:12:06,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-11-23 22:12:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2019-11-23 22:12:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-11-23 22:12:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 225 transitions. [2019-11-23 22:12:06,153 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 225 transitions. Word has length 181 [2019-11-23 22:12:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:06,154 INFO L462 AbstractCegarLoop]: Abstraction has 185 states and 225 transitions. [2019-11-23 22:12:06,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-11-23 22:12:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 225 transitions. [2019-11-23 22:12:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-23 22:12:06,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:06,155 INFO L410 BasicCegarLoop]: trace histogram [60, 59, 40, 20, 1, 1, 1, 1, 1] [2019-11-23 22:12:06,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:06,359 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:06,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:06,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2086805757, now seen corresponding path program 23 times [2019-11-23 22:12:06,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:06,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184320999] [2019-11-23 22:12:06,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 2324 proven. 2986 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:08,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184320999] [2019-11-23 22:12:08,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856789635] [2019-11-23 22:12:08,550 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:08,655 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2019-11-23 22:12:08,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:08,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:12:08,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 2438 proven. 610 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-23 22:12:09,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:09,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 22] total 102 [2019-11-23 22:12:09,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967032395] [2019-11-23 22:12:09,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-11-23 22:12:09,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:09,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-11-23 22:12:09,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1974, Invalid=8532, Unknown=0, NotChecked=0, Total=10506 [2019-11-23 22:12:09,524 INFO L87 Difference]: Start difference. First operand 185 states and 225 transitions. Second operand 103 states. [2019-11-23 22:12:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:10,936 INFO L93 Difference]: Finished difference Result 314 states and 395 transitions. [2019-11-23 22:12:10,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 22:12:10,937 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 184 [2019-11-23 22:12:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:10,939 INFO L225 Difference]: With dead ends: 314 [2019-11-23 22:12:10,939 INFO L226 Difference]: Without dead ends: 189 [2019-11-23 22:12:10,940 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5576 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4198, Invalid=16394, Unknown=0, NotChecked=0, Total=20592 [2019-11-23 22:12:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-23 22:12:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2019-11-23 22:12:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 22:12:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 228 transitions. [2019-11-23 22:12:10,958 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 228 transitions. Word has length 184 [2019-11-23 22:12:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:10,959 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 228 transitions. [2019-11-23 22:12:10,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-11-23 22:12:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 228 transitions. [2019-11-23 22:12:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 22:12:10,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:10,960 INFO L410 BasicCegarLoop]: trace histogram [61, 60, 40, 21, 1, 1, 1, 1, 1] [2019-11-23 22:12:11,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:11,165 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:11,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:11,165 INFO L82 PathProgramCache]: Analyzing trace with hash 418555339, now seen corresponding path program 24 times [2019-11-23 22:12:11,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:11,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407615289] [2019-11-23 22:12:11,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5490 backedges. 2327 proven. 3163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:13,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407615289] [2019-11-23 22:12:13,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97717695] [2019-11-23 22:12:13,308 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:13,436 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2019-11-23 22:12:13,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:13,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 62 conjunts are in the unsatisfiable core [2019-11-23 22:12:13,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5490 backedges. 4146 proven. 1282 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-11-23 22:12:14,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:14,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 41] total 113 [2019-11-23 22:12:14,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887130385] [2019-11-23 22:12:14,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 114 states [2019-11-23 22:12:14,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:14,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2019-11-23 22:12:14,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3474, Invalid=9408, Unknown=0, NotChecked=0, Total=12882 [2019-11-23 22:12:14,246 INFO L87 Difference]: Start difference. First operand 188 states and 228 transitions. Second operand 114 states. [2019-11-23 22:12:15,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:15,711 INFO L93 Difference]: Finished difference Result 317 states and 398 transitions. [2019-11-23 22:12:15,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 22:12:15,712 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 187 [2019-11-23 22:12:15,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:15,713 INFO L225 Difference]: With dead ends: 317 [2019-11-23 22:12:15,713 INFO L226 Difference]: Without dead ends: 191 [2019-11-23 22:12:15,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8473 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5930, Invalid=18876, Unknown=0, NotChecked=0, Total=24806 [2019-11-23 22:12:15,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-23 22:12:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2019-11-23 22:12:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-11-23 22:12:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2019-11-23 22:12:15,726 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 187 [2019-11-23 22:12:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:15,726 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2019-11-23 22:12:15,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 114 states. [2019-11-23 22:12:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2019-11-23 22:12:15,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-11-23 22:12:15,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:15,728 INFO L410 BasicCegarLoop]: trace histogram [62, 61, 40, 22, 1, 1, 1, 1, 1] [2019-11-23 22:12:15,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:15,931 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:15,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:15,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1363065283, now seen corresponding path program 25 times [2019-11-23 22:12:15,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:15,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227705107] [2019-11-23 22:12:15,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 2330 proven. 3343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:18,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227705107] [2019-11-23 22:12:18,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625233038] [2019-11-23 22:12:18,826 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:18,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:12:18,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 2674 proven. 737 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-23 22:12:19,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:19,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 24] total 108 [2019-11-23 22:12:19,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317996939] [2019-11-23 22:12:19,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 109 states [2019-11-23 22:12:19,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:19,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2019-11-23 22:12:19,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2199, Invalid=9573, Unknown=0, NotChecked=0, Total=11772 [2019-11-23 22:12:19,898 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand 109 states. [2019-11-23 22:12:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:21,569 INFO L93 Difference]: Finished difference Result 320 states and 401 transitions. [2019-11-23 22:12:21,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 22:12:21,570 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 190 [2019-11-23 22:12:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:21,571 INFO L225 Difference]: With dead ends: 320 [2019-11-23 22:12:21,571 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 22:12:21,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6302 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4865, Invalid=18697, Unknown=0, NotChecked=0, Total=23562 [2019-11-23 22:12:21,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 22:12:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-11-23 22:12:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 22:12:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 234 transitions. [2019-11-23 22:12:21,584 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 234 transitions. Word has length 190 [2019-11-23 22:12:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:21,585 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 234 transitions. [2019-11-23 22:12:21,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 109 states. [2019-11-23 22:12:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 234 transitions. [2019-11-23 22:12:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 22:12:21,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:21,586 INFO L410 BasicCegarLoop]: trace histogram [63, 62, 40, 23, 1, 1, 1, 1, 1] [2019-11-23 22:12:21,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:21,790 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:21,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:21,791 INFO L82 PathProgramCache]: Analyzing trace with hash -417171317, now seen corresponding path program 26 times [2019-11-23 22:12:21,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:21,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032566485] [2019-11-23 22:12:21,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 2333 proven. 3526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:24,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032566485] [2019-11-23 22:12:24,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367173835] [2019-11-23 22:12:24,091 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:24,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:24,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:24,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:12:24,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 2792 proven. 805 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-23 22:12:25,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:25,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 25] total 111 [2019-11-23 22:12:25,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501951485] [2019-11-23 22:12:25,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-11-23 22:12:25,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:25,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-11-23 22:12:25,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2319, Invalid=10113, Unknown=0, NotChecked=0, Total=12432 [2019-11-23 22:12:25,261 INFO L87 Difference]: Start difference. First operand 194 states and 234 transitions. Second operand 112 states. [2019-11-23 22:12:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:26,895 INFO L93 Difference]: Finished difference Result 323 states and 404 transitions. [2019-11-23 22:12:26,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 22:12:26,895 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 193 [2019-11-23 22:12:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:26,896 INFO L225 Difference]: With dead ends: 323 [2019-11-23 22:12:26,896 INFO L226 Difference]: Without dead ends: 198 [2019-11-23 22:12:26,897 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6677 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5221, Invalid=19901, Unknown=0, NotChecked=0, Total=25122 [2019-11-23 22:12:26,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-11-23 22:12:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2019-11-23 22:12:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-11-23 22:12:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 237 transitions. [2019-11-23 22:12:26,906 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 237 transitions. Word has length 193 [2019-11-23 22:12:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:26,906 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 237 transitions. [2019-11-23 22:12:26,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-11-23 22:12:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 237 transitions. [2019-11-23 22:12:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-11-23 22:12:26,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:26,907 INFO L410 BasicCegarLoop]: trace histogram [64, 63, 40, 24, 1, 1, 1, 1, 1] [2019-11-23 22:12:27,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:27,107 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:27,108 INFO L82 PathProgramCache]: Analyzing trace with hash -570459267, now seen corresponding path program 27 times [2019-11-23 22:12:27,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:27,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434652455] [2019-11-23 22:12:27,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 2336 proven. 3712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:29,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434652455] [2019-11-23 22:12:29,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172837378] [2019-11-23 22:12:29,916 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:30,044 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2019-11-23 22:12:30,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:30,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-23 22:12:30,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 4296 proven. 1681 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 22:12:30,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:30,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 41] total 116 [2019-11-23 22:12:30,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616061262] [2019-11-23 22:12:30,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 117 states [2019-11-23 22:12:30,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:30,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2019-11-23 22:12:30,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3552, Invalid=10020, Unknown=0, NotChecked=0, Total=13572 [2019-11-23 22:12:30,893 INFO L87 Difference]: Start difference. First operand 197 states and 237 transitions. Second operand 117 states. [2019-11-23 22:12:32,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:32,737 INFO L93 Difference]: Finished difference Result 326 states and 407 transitions. [2019-11-23 22:12:32,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 22:12:32,738 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 196 [2019-11-23 22:12:32,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:32,740 INFO L225 Difference]: With dead ends: 326 [2019-11-23 22:12:32,740 INFO L226 Difference]: Without dead ends: 200 [2019-11-23 22:12:32,742 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8536 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6710, Invalid=21012, Unknown=0, NotChecked=0, Total=27722 [2019-11-23 22:12:32,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-11-23 22:12:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2019-11-23 22:12:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-23 22:12:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 240 transitions. [2019-11-23 22:12:32,761 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 240 transitions. Word has length 196 [2019-11-23 22:12:32,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:32,761 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 240 transitions. [2019-11-23 22:12:32,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 117 states. [2019-11-23 22:12:32,762 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 240 transitions. [2019-11-23 22:12:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 22:12:32,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:32,764 INFO L410 BasicCegarLoop]: trace histogram [65, 64, 40, 25, 1, 1, 1, 1, 1] [2019-11-23 22:12:32,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:32,970 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:32,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:32,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1621542069, now seen corresponding path program 28 times [2019-11-23 22:12:32,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:32,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463935007] [2019-11-23 22:12:32,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 2339 proven. 3901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:35,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463935007] [2019-11-23 22:12:35,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626545707] [2019-11-23 22:12:35,858 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:35,931 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:35,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:35,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 22:12:35,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 3028 proven. 950 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-23 22:12:37,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:37,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 27] total 117 [2019-11-23 22:12:37,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630085522] [2019-11-23 22:12:37,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 118 states [2019-11-23 22:12:37,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:37,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2019-11-23 22:12:37,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2574, Invalid=11232, Unknown=0, NotChecked=0, Total=13806 [2019-11-23 22:12:37,616 INFO L87 Difference]: Start difference. First operand 200 states and 240 transitions. Second operand 118 states. [2019-11-23 22:12:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:39,505 INFO L93 Difference]: Finished difference Result 329 states and 410 transitions. [2019-11-23 22:12:39,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-23 22:12:39,506 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 199 [2019-11-23 22:12:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:39,507 INFO L225 Difference]: With dead ends: 329 [2019-11-23 22:12:39,507 INFO L226 Difference]: Without dead ends: 204 [2019-11-23 22:12:39,509 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7451 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5978, Invalid=22414, Unknown=0, NotChecked=0, Total=28392 [2019-11-23 22:12:39,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-11-23 22:12:39,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2019-11-23 22:12:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-11-23 22:12:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 243 transitions. [2019-11-23 22:12:39,521 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 243 transitions. Word has length 199 [2019-11-23 22:12:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:39,521 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 243 transitions. [2019-11-23 22:12:39,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 118 states. [2019-11-23 22:12:39,521 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 243 transitions. [2019-11-23 22:12:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-23 22:12:39,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:39,522 INFO L410 BasicCegarLoop]: trace histogram [66, 65, 40, 26, 1, 1, 1, 1, 1] [2019-11-23 22:12:39,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:39,726 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:39,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:39,727 INFO L82 PathProgramCache]: Analyzing trace with hash 177258685, now seen corresponding path program 29 times [2019-11-23 22:12:39,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:39,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450182512] [2019-11-23 22:12:39,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 2342 proven. 4093 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:42,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450182512] [2019-11-23 22:12:42,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327332846] [2019-11-23 22:12:42,302 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:42,420 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2019-11-23 22:12:42,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:42,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 22:12:42,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 3146 proven. 1027 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-23 22:12:43,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:43,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 28] total 120 [2019-11-23 22:12:43,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242720496] [2019-11-23 22:12:43,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 121 states [2019-11-23 22:12:43,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:43,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2019-11-23 22:12:43,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2709, Invalid=11811, Unknown=0, NotChecked=0, Total=14520 [2019-11-23 22:12:43,676 INFO L87 Difference]: Start difference. First operand 203 states and 243 transitions. Second operand 121 states. [2019-11-23 22:12:45,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:45,771 INFO L93 Difference]: Finished difference Result 332 states and 413 transitions. [2019-11-23 22:12:45,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-23 22:12:45,771 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 202 [2019-11-23 22:12:45,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:45,773 INFO L225 Difference]: With dead ends: 332 [2019-11-23 22:12:45,773 INFO L226 Difference]: Without dead ends: 207 [2019-11-23 22:12:45,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7846 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6383, Invalid=23719, Unknown=0, NotChecked=0, Total=30102 [2019-11-23 22:12:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-11-23 22:12:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2019-11-23 22:12:45,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-11-23 22:12:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2019-11-23 22:12:45,787 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 202 [2019-11-23 22:12:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:45,787 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2019-11-23 22:12:45,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 121 states. [2019-11-23 22:12:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2019-11-23 22:12:45,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-23 22:12:45,789 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:45,789 INFO L410 BasicCegarLoop]: trace histogram [67, 66, 40, 27, 1, 1, 1, 1, 1] [2019-11-23 22:12:45,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:45,993 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:45,993 INFO L82 PathProgramCache]: Analyzing trace with hash -56431093, now seen corresponding path program 30 times [2019-11-23 22:12:45,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:45,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588033221] [2019-11-23 22:12:45,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 2345 proven. 4288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:48,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588033221] [2019-11-23 22:12:48,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11346257] [2019-11-23 22:12:48,750 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:48,875 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2019-11-23 22:12:48,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:48,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:12:48,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 3264 proven. 1107 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-23 22:12:50,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:50,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 29] total 123 [2019-11-23 22:12:50,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191599006] [2019-11-23 22:12:50,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 124 states [2019-11-23 22:12:50,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2019-11-23 22:12:50,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2849, Invalid=12403, Unknown=0, NotChecked=0, Total=15252 [2019-11-23 22:12:50,228 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 124 states. [2019-11-23 22:12:52,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:52,471 INFO L93 Difference]: Finished difference Result 335 states and 416 transitions. [2019-11-23 22:12:52,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-11-23 22:12:52,473 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 205 [2019-11-23 22:12:52,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:52,475 INFO L225 Difference]: With dead ends: 335 [2019-11-23 22:12:52,475 INFO L226 Difference]: Without dead ends: 210 [2019-11-23 22:12:52,477 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8241 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6811, Invalid=25051, Unknown=0, NotChecked=0, Total=31862 [2019-11-23 22:12:52,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-23 22:12:52,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2019-11-23 22:12:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-11-23 22:12:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 249 transitions. [2019-11-23 22:12:52,488 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 249 transitions. Word has length 205 [2019-11-23 22:12:52,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:52,488 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 249 transitions. [2019-11-23 22:12:52,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 124 states. [2019-11-23 22:12:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 249 transitions. [2019-11-23 22:12:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-11-23 22:12:52,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:52,489 INFO L410 BasicCegarLoop]: trace histogram [68, 67, 40, 28, 1, 1, 1, 1, 1] [2019-11-23 22:12:52,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:52,690 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:52,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:52,691 INFO L82 PathProgramCache]: Analyzing trace with hash 233379325, now seen corresponding path program 31 times [2019-11-23 22:12:52,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:52,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203262824] [2019-11-23 22:12:52,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 2348 proven. 4486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:56,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203262824] [2019-11-23 22:12:56,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524817917] [2019-11-23 22:12:56,220 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:56,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:12:56,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 3382 proven. 1190 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-11-23 22:12:57,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:57,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 30] total 126 [2019-11-23 22:12:57,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751857455] [2019-11-23 22:12:57,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 127 states [2019-11-23 22:12:57,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:57,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2019-11-23 22:12:57,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2994, Invalid=13008, Unknown=0, NotChecked=0, Total=16002 [2019-11-23 22:12:57,715 INFO L87 Difference]: Start difference. First operand 209 states and 249 transitions. Second operand 127 states. [2019-11-23 22:13:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:00,114 INFO L93 Difference]: Finished difference Result 338 states and 419 transitions. [2019-11-23 22:13:00,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-11-23 22:13:00,114 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 208 [2019-11-23 22:13:00,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:00,116 INFO L225 Difference]: With dead ends: 338 [2019-11-23 22:13:00,116 INFO L226 Difference]: Without dead ends: 213 [2019-11-23 22:13:00,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8636 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=7262, Invalid=26410, Unknown=0, NotChecked=0, Total=33672 [2019-11-23 22:13:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-11-23 22:13:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2019-11-23 22:13:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-11-23 22:13:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2019-11-23 22:13:00,130 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 208 [2019-11-23 22:13:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:00,130 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2019-11-23 22:13:00,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 127 states. [2019-11-23 22:13:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2019-11-23 22:13:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-11-23 22:13:00,131 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:00,131 INFO L410 BasicCegarLoop]: trace histogram [69, 68, 40, 29, 1, 1, 1, 1, 1] [2019-11-23 22:13:00,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:00,335 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:00,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:00,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1091277003, now seen corresponding path program 32 times [2019-11-23 22:13:00,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:00,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007508365] [2019-11-23 22:13:00,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat