/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:35:36,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:35:36,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:35:36,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:35:36,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:35:36,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:35:36,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:35:36,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:35:36,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:35:36,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:35:36,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:35:36,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:35:36,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:35:36,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:35:36,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:35:36,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:35:36,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:35:36,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:35:36,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:35:36,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:35:36,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:35:36,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:35:36,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:35:36,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:35:36,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:35:36,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:35:36,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:35:36,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:35:36,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:35:36,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:35:36,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:35:36,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:35:36,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:35:36,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:35:36,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:35:36,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:35:36,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:35:36,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:35:36,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:35:36,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:35:36,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:35:36,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:35:36,580 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:35:36,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:35:36,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:35:36,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:35:36,582 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:35:36,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:35:36,582 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:35:36,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:35:36,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:35:36,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:35:36,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:35:36,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:35:36,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:35:36,584 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:35:36,584 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:35:36,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:35:36,584 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:35:36,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:35:36,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:35:36,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:35:36,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:35:36,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:35:36,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:35:36,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:35:36,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:35:36,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:35:36,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:35:36,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:35:36,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:35:36,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:35:36,900 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:35:36,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:35:36,920 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:35:36,922 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:35:36,922 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:35:36,923 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_05.i [2019-11-23 20:35:37,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bff4c6ea/830de80da4394917b3a2b1d2e5c13227/FLAG5df6aacc1 [2019-11-23 20:35:37,436 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:35:37,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_05.i [2019-11-23 20:35:37,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bff4c6ea/830de80da4394917b3a2b1d2e5c13227/FLAG5df6aacc1 [2019-11-23 20:35:37,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bff4c6ea/830de80da4394917b3a2b1d2e5c13227 [2019-11-23 20:35:37,795 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:35:37,796 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:35:37,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:35:37,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:35:37,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:35:37,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:37" (1/1) ... [2019-11-23 20:35:37,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3058475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:37, skipping insertion in model container [2019-11-23 20:35:37,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:37" (1/1) ... [2019-11-23 20:35:37,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:35:37,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:35:38,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:38,016 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:35:38,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:38,058 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:35:38,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:38 WrapperNode [2019-11-23 20:35:38,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:35:38,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:38,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:35:38,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:35:38,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:38" (1/1) ... [2019-11-23 20:35:38,148 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:38" (1/1) ... [2019-11-23 20:35:38,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:38,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:35:38,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:35:38,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:35:38,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:38" (1/1) ... [2019-11-23 20:35:38,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:38" (1/1) ... [2019-11-23 20:35:38,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:38" (1/1) ... [2019-11-23 20:35:38,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:38" (1/1) ... [2019-11-23 20:35:38,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:38" (1/1) ... [2019-11-23 20:35:38,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:38" (1/1) ... [2019-11-23 20:35:38,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:38" (1/1) ... [2019-11-23 20:35:38,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:35:38,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:35:38,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:35:38,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:35:38,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:35:38,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:35:38,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:35:38,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:35:38,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:35:38,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:35:38,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:35:38,501 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:35:38,501 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:35:38,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:38 BoogieIcfgContainer [2019-11-23 20:35:38,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:35:38,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:35:38,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:35:38,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:35:38,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:35:37" (1/3) ... [2019-11-23 20:35:38,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1003b5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:38, skipping insertion in model container [2019-11-23 20:35:38,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:38" (2/3) ... [2019-11-23 20:35:38,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1003b5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:38, skipping insertion in model container [2019-11-23 20:35:38,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:38" (3/3) ... [2019-11-23 20:35:38,527 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_05.i [2019-11-23 20:35:38,538 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:35:38,547 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:35:38,567 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:35:38,587 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:35:38,587 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:35:38,587 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:35:38,587 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:35:38,587 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:35:38,587 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:35:38,588 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:35:38,588 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:35:38,600 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 20:35:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:35:38,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:38,607 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:38,608 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:38,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:38,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2019-11-23 20:35:38,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:38,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795095952] [2019-11-23 20:35:38,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:38,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795095952] [2019-11-23 20:35:38,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:38,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:35:38,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815650009] [2019-11-23 20:35:38,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:35:38,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:38,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:35:38,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:38,813 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-11-23 20:35:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:38,907 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-11-23 20:35:38,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:35:38,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:35:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:38,919 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:35:38,920 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 20:35:38,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:38,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 20:35:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 20:35:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 20:35:38,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 20:35:38,967 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2019-11-23 20:35:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:38,968 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 20:35:38,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:35:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 20:35:38,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:35:38,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:38,970 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:38,972 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:38,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:38,973 INFO L82 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2019-11-23 20:35:38,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:38,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568256868] [2019-11-23 20:35:38,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:39,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568256868] [2019-11-23 20:35:39,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:39,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:35:39,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198354669] [2019-11-23 20:35:39,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:35:39,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:39,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:35:39,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:39,064 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2019-11-23 20:35:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:39,093 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-23 20:35:39,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:35:39,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:35:39,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:39,095 INFO L225 Difference]: With dead ends: 24 [2019-11-23 20:35:39,095 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:35:39,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:35:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2019-11-23 20:35:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:35:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-23 20:35:39,101 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2019-11-23 20:35:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:39,101 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-23 20:35:39,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:35:39,102 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-23 20:35:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:35:39,102 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:39,103 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:39,103 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:39,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:39,103 INFO L82 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2019-11-23 20:35:39,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:39,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461355468] [2019-11-23 20:35:39,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:39,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461355468] [2019-11-23 20:35:39,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798594112] [2019-11-23 20:35:39,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:39,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:35:39,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:39,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:39,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:35:39,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159757939] [2019-11-23 20:35:39,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:35:39,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:39,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:35:39,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:39,276 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 6 states. [2019-11-23 20:35:39,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:39,357 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-23 20:35:39,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:35:39,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 20:35:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:39,358 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:35:39,359 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:35:39,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:39,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:35:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2019-11-23 20:35:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:35:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 20:35:39,368 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-11-23 20:35:39,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:39,369 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 20:35:39,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:35:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 20:35:39,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:35:39,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:39,370 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:39,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:39,574 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:39,575 INFO L82 PathProgramCache]: Analyzing trace with hash -588918413, now seen corresponding path program 2 times [2019-11-23 20:35:39,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:39,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531596491] [2019-11-23 20:35:39,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:35:39,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531596491] [2019-11-23 20:35:39,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002805408] [2019-11-23 20:35:39,648 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:39,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:39,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:39,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:39,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:39,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:39,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2019-11-23 20:35:39,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601261930] [2019-11-23 20:35:39,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:35:39,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:39,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:35:39,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:35:39,751 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2019-11-23 20:35:39,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:39,830 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-11-23 20:35:39,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:35:39,831 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-23 20:35:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:39,832 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:35:39,832 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:35:39,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:35:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:35:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2019-11-23 20:35:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:35:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-23 20:35:39,839 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2019-11-23 20:35:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:39,839 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-23 20:35:39,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:35:39,840 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-23 20:35:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:35:39,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:39,841 INFO L410 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:40,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:40,045 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:40,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:40,046 INFO L82 PathProgramCache]: Analyzing trace with hash -825242030, now seen corresponding path program 3 times [2019-11-23 20:35:40,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:40,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297627921] [2019-11-23 20:35:40,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:35:40,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297627921] [2019-11-23 20:35:40,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112946136] [2019-11-23 20:35:40,190 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:40,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:35:40,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:40,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:40,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:35:40,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:40,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:35:40,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633867205] [2019-11-23 20:35:40,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:35:40,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:40,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:35:40,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:40,280 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2019-11-23 20:35:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:40,345 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2019-11-23 20:35:40,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:35:40,346 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-23 20:35:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:40,347 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:35:40,347 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:35:40,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:40,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:35:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 21. [2019-11-23 20:35:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:35:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 20:35:40,354 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2019-11-23 20:35:40,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:40,354 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 20:35:40,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:35:40,354 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 20:35:40,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:35:40,355 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:40,355 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:40,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:40,559 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash 238747000, now seen corresponding path program 4 times [2019-11-23 20:35:40,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:40,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938830406] [2019-11-23 20:35:40,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:35:40,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938830406] [2019-11-23 20:35:40,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996375118] [2019-11-23 20:35:40,662 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:40,710 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:40,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:40,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:35:40,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:35:40,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:40,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2019-11-23 20:35:40,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391626656] [2019-11-23 20:35:40,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:35:40,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:40,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:35:40,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:40,780 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 13 states. [2019-11-23 20:35:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:40,894 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2019-11-23 20:35:40,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:35:40,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2019-11-23 20:35:40,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:40,895 INFO L225 Difference]: With dead ends: 63 [2019-11-23 20:35:40,895 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:35:40,896 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:35:40,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 26. [2019-11-23 20:35:40,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:35:40,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-23 20:35:40,902 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2019-11-23 20:35:40,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:40,903 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-23 20:35:40,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:35:40,903 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-23 20:35:40,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:35:40,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:40,904 INFO L410 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:41,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:41,109 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:41,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1232303186, now seen corresponding path program 5 times [2019-11-23 20:35:41,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:41,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884620048] [2019-11-23 20:35:41,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:35:41,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884620048] [2019-11-23 20:35:41,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744405080] [2019-11-23 20:35:41,233 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:41,494 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:35:41,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:41,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:35:41,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:35:41,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:41,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 18 [2019-11-23 20:35:41,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532200525] [2019-11-23 20:35:41,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:35:41,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:41,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:35:41,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:35:41,618 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 18 states. [2019-11-23 20:35:41,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:41,858 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2019-11-23 20:35:41,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:35:41,862 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2019-11-23 20:35:41,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:41,863 INFO L225 Difference]: With dead ends: 75 [2019-11-23 20:35:41,863 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:35:41,865 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:35:41,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:35:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 32. [2019-11-23 20:35:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:35:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-23 20:35:41,881 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2019-11-23 20:35:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:41,881 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-23 20:35:41,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:35:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-23 20:35:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:35:41,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:41,883 INFO L410 BasicCegarLoop]: trace histogram [15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:42,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:42,085 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:42,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1146468813, now seen corresponding path program 6 times [2019-11-23 20:35:42,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:42,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655537220] [2019-11-23 20:35:42,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 20:35:42,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655537220] [2019-11-23 20:35:42,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343040039] [2019-11-23 20:35:42,239 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:42,516 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:35:42,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:42,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:35:42,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 20:35:42,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:42,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:35:42,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958307627] [2019-11-23 20:35:42,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:35:42,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:42,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:35:42,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:42,533 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 10 states. [2019-11-23 20:35:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:42,627 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2019-11-23 20:35:42,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:35:42,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-23 20:35:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:42,629 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:35:42,629 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:35:42,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:42,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:35:42,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 33. [2019-11-23 20:35:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:35:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-23 20:35:42,637 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2019-11-23 20:35:42,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:42,637 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-23 20:35:42,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:35:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-23 20:35:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:35:42,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:42,639 INFO L410 BasicCegarLoop]: trace histogram [15, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:42,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:42,843 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1129348681, now seen corresponding path program 7 times [2019-11-23 20:35:42,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:42,845 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124603853] [2019-11-23 20:35:42,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 20:35:42,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124603853] [2019-11-23 20:35:42,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273642219] [2019-11-23 20:35:42,988 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:43,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:35:43,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:35:43,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:43,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18] total 24 [2019-11-23 20:35:43,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398759013] [2019-11-23 20:35:43,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:35:43,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:43,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:35:43,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:35:43,177 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 24 states. [2019-11-23 20:35:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:43,305 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2019-11-23 20:35:43,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:35:43,306 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-11-23 20:35:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:43,307 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:35:43,307 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:35:43,307 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:35:43,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:35:43,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 40. [2019-11-23 20:35:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:35:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2019-11-23 20:35:43,314 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2019-11-23 20:35:43,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:43,314 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2019-11-23 20:35:43,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:35:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2019-11-23 20:35:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:35:43,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:43,316 INFO L410 BasicCegarLoop]: trace histogram [21, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:43,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:43,524 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:43,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:43,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1471581331, now seen corresponding path program 8 times [2019-11-23 20:35:43,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:43,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213093372] [2019-11-23 20:35:43,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-23 20:35:43,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213093372] [2019-11-23 20:35:43,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124950069] [2019-11-23 20:35:43,632 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:43,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:43,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:43,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:35:43,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:35:43,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:43,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 24] total 29 [2019-11-23 20:35:43,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042439866] [2019-11-23 20:35:43,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:35:43,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:43,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:35:43,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=407, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:35:43,869 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 29 states. [2019-11-23 20:35:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:44,036 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 20:35:44,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:35:44,036 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2019-11-23 20:35:44,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:44,037 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:35:44,037 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:35:44,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=405, Invalid=407, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:35:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:35:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 46. [2019-11-23 20:35:44,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:35:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-11-23 20:35:44,046 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 38 [2019-11-23 20:35:44,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:44,046 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-11-23 20:35:44,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:35:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-11-23 20:35:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:35:44,047 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:44,047 INFO L410 BasicCegarLoop]: trace histogram [26, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:44,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:44,262 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash -643280174, now seen corresponding path program 9 times [2019-11-23 20:35:44,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:44,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943822018] [2019-11-23 20:35:44,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 20:35:44,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943822018] [2019-11-23 20:35:44,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802456273] [2019-11-23 20:35:44,375 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:44,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:35:44,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:44,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:35:44,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 20:35:44,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:44,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:35:44,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712620447] [2019-11-23 20:35:44,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:35:44,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:44,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:35:44,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:44,620 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 13 states. [2019-11-23 20:35:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:44,722 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2019-11-23 20:35:44,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:35:44,722 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2019-11-23 20:35:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:44,724 INFO L225 Difference]: With dead ends: 103 [2019-11-23 20:35:44,724 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 20:35:44,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 20:35:44,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 47. [2019-11-23 20:35:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:35:44,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2019-11-23 20:35:44,731 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2019-11-23 20:35:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:44,731 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2019-11-23 20:35:44,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:35:44,732 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2019-11-23 20:35:44,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:35:44,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:44,733 INFO L410 BasicCegarLoop]: trace histogram [26, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:44,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:44,937 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:44,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1584597240, now seen corresponding path program 10 times [2019-11-23 20:35:44,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:44,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425682556] [2019-11-23 20:35:44,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 20:35:45,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425682556] [2019-11-23 20:35:45,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926621969] [2019-11-23 20:35:45,086 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:45,175 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:45,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:45,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:35:45,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:35:45,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:45,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 29] total 35 [2019-11-23 20:35:45,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800962541] [2019-11-23 20:35:45,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:35:45,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:35:45,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=596, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:35:45,390 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 35 states. [2019-11-23 20:35:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:45,611 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2019-11-23 20:35:45,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:35:45,612 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 45 [2019-11-23 20:35:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:45,613 INFO L225 Difference]: With dead ends: 127 [2019-11-23 20:35:45,613 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 20:35:45,614 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=594, Invalid=596, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:35:45,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 20:35:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 54. [2019-11-23 20:35:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:35:45,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-11-23 20:35:45,619 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 45 [2019-11-23 20:35:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:45,619 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-11-23 20:35:45,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:35:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-11-23 20:35:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 20:35:45,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:45,621 INFO L410 BasicCegarLoop]: trace histogram [32, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:45,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:45,830 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:45,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1590175090, now seen corresponding path program 11 times [2019-11-23 20:35:45,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:45,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226765314] [2019-11-23 20:35:45,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2019-11-23 20:35:45,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226765314] [2019-11-23 20:35:45,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170482812] [2019-11-23 20:35:45,987 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 20:36:24,953 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-23 20:36:24,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:24,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:36:24,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:36:25,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:25,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 35] total 41 [2019-11-23 20:36:25,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068836623] [2019-11-23 20:36:25,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:36:25,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:25,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:36:25,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=821, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:36:25,257 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 41 states. [2019-11-23 20:36:25,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:25,497 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2019-11-23 20:36:25,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:36:25,497 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 52 [2019-11-23 20:36:25,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:25,499 INFO L225 Difference]: With dead ends: 140 [2019-11-23 20:36:25,499 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 20:36:25,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=819, Invalid=821, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:36:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 20:36:25,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 61. [2019-11-23 20:36:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 20:36:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2019-11-23 20:36:25,507 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 52 [2019-11-23 20:36:25,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:25,507 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2019-11-23 20:36:25,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:36:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2019-11-23 20:36:25,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:36:25,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:25,509 INFO L410 BasicCegarLoop]: trace histogram [38, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:25,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:25,712 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:25,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1045225352, now seen corresponding path program 12 times [2019-11-23 20:36:25,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:25,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683669869] [2019-11-23 20:36:25,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2019-11-23 20:36:25,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683669869] [2019-11-23 20:36:25,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761558293] [2019-11-23 20:36:25,882 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 20:36:48,053 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:36:48,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:48,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:36:48,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2019-11-23 20:36:48,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:48,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:36:48,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453779753] [2019-11-23 20:36:48,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:36:48,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:48,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:36:48,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:36:48,095 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 16 states. [2019-11-23 20:36:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:48,200 INFO L93 Difference]: Finished difference Result 133 states and 136 transitions. [2019-11-23 20:36:48,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:36:48,201 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2019-11-23 20:36:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:48,203 INFO L225 Difference]: With dead ends: 133 [2019-11-23 20:36:48,203 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:36:48,203 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:36:48,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:36:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 62. [2019-11-23 20:36:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:36:48,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-11-23 20:36:48,210 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2019-11-23 20:36:48,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:48,210 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-11-23 20:36:48,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:36:48,210 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-11-23 20:36:48,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:36:48,211 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:48,211 INFO L410 BasicCegarLoop]: trace histogram [38, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:48,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:48,423 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:48,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2009198610, now seen corresponding path program 13 times [2019-11-23 20:36:48,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:48,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021613115] [2019-11-23 20:36:48,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2019-11-23 20:36:48,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021613115] [2019-11-23 20:36:48,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919008306] [2019-11-23 20:36:48,592 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 20:36:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:48,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:36:48,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:36:49,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:49,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 41] total 48 [2019-11-23 20:36:49,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142040717] [2019-11-23 20:36:49,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:36:49,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:49,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:36:49,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=1129, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:36:49,064 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 48 states. [2019-11-23 20:36:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:49,308 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 20:36:49,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 20:36:49,309 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 60 [2019-11-23 20:36:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:49,310 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:36:49,310 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:36:49,311 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1127, Invalid=1129, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:36:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:36:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 70. [2019-11-23 20:36:49,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:36:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-11-23 20:36:49,323 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 60 [2019-11-23 20:36:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:49,324 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-11-23 20:36:49,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:36:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-11-23 20:36:49,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:36:49,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:49,328 INFO L410 BasicCegarLoop]: trace histogram [45, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:49,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:49,541 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:49,541 INFO L82 PathProgramCache]: Analyzing trace with hash -56828525, now seen corresponding path program 14 times [2019-11-23 20:36:49,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:49,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536918758] [2019-11-23 20:36:49,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2019-11-23 20:36:49,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536918758] [2019-11-23 20:36:49,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750722162] [2019-11-23 20:36:49,746 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 20:36:49,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:36:49,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:49,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-23 20:36:49,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:36:50,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:50,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 48] total 55 [2019-11-23 20:36:50,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960565308] [2019-11-23 20:36:50,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 20:36:50,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:50,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 20:36:50,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 20:36:50,233 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 55 states. [2019-11-23 20:36:50,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:50,488 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 20:36:50,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-23 20:36:50,489 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 68 [2019-11-23 20:36:50,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:50,490 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:36:50,490 INFO L226 Difference]: Without dead ends: 153 [2019-11-23 20:36:50,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1981 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 20:36:50,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-11-23 20:36:50,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 78. [2019-11-23 20:36:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:36:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2019-11-23 20:36:50,499 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2019-11-23 20:36:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:50,499 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2019-11-23 20:36:50,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 20:36:50,500 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2019-11-23 20:36:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 20:36:50,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:50,501 INFO L410 BasicCegarLoop]: trace histogram [52, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:50,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:50,704 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:50,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:50,705 INFO L82 PathProgramCache]: Analyzing trace with hash 634492210, now seen corresponding path program 15 times [2019-11-23 20:36:50,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:50,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67510979] [2019-11-23 20:36:50,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2019-11-23 20:36:50,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67510979] [2019-11-23 20:36:50,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119109648] [2019-11-23 20:36:50,944 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 20:36:59,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:36:59,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:59,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:36:59,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2019-11-23 20:36:59,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:59,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:36:59,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21536948] [2019-11-23 20:36:59,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:36:59,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:59,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:36:59,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:36:59,950 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 19 states. [2019-11-23 20:37:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:00,062 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2019-11-23 20:37:00,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:37:00,063 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2019-11-23 20:37:00,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:00,064 INFO L225 Difference]: With dead ends: 165 [2019-11-23 20:37:00,064 INFO L226 Difference]: Without dead ends: 159 [2019-11-23 20:37:00,064 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:37:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-11-23 20:37:00,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 79. [2019-11-23 20:37:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 20:37:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2019-11-23 20:37:00,079 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2019-11-23 20:37:00,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:00,079 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2019-11-23 20:37:00,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:37:00,080 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2019-11-23 20:37:00,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:37:00,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:00,081 INFO L410 BasicCegarLoop]: trace histogram [52, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:00,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:00,292 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:00,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1754131816, now seen corresponding path program 16 times [2019-11-23 20:37:00,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:00,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928186446] [2019-11-23 20:37:00,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2019-11-23 20:37:00,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928186446] [2019-11-23 20:37:00,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149319325] [2019-11-23 20:37:00,536 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 20:37:00,629 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:00,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:00,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 54 conjunts are in the unsatisfiable core [2019-11-23 20:37:00,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:37:01,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:01,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 55] total 62 [2019-11-23 20:37:01,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818494101] [2019-11-23 20:37:01,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-11-23 20:37:01,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:01,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-11-23 20:37:01,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1890, Invalid=1892, Unknown=0, NotChecked=0, Total=3782 [2019-11-23 20:37:01,116 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 62 states. [2019-11-23 20:37:01,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:01,456 INFO L93 Difference]: Finished difference Result 196 states and 207 transitions. [2019-11-23 20:37:01,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-11-23 20:37:01,457 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 77 [2019-11-23 20:37:01,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:01,458 INFO L225 Difference]: With dead ends: 196 [2019-11-23 20:37:01,458 INFO L226 Difference]: Without dead ends: 172 [2019-11-23 20:37:01,471 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2579 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1890, Invalid=1892, Unknown=0, NotChecked=0, Total=3782 [2019-11-23 20:37:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-23 20:37:01,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 87. [2019-11-23 20:37:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 20:37:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2019-11-23 20:37:01,483 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 77 [2019-11-23 20:37:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:01,483 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2019-11-23 20:37:01,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-11-23 20:37:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2019-11-23 20:37:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:37:01,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:01,486 INFO L410 BasicCegarLoop]: trace histogram [59, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:01,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:01,687 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:01,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:01,688 INFO L82 PathProgramCache]: Analyzing trace with hash -200734345, now seen corresponding path program 17 times [2019-11-23 20:37:01,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:01,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282406837] [2019-11-23 20:37:01,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-11-23 20:37:01,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282406837] [2019-11-23 20:37:01,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187688196] [2019-11-23 20:37:01,963 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