/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-acceleration/functions_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:25:58,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:25:58,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:25:58,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 04:25:58,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:25:58,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:25:58,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:25:58,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:25:58,787 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:25:58,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:25:58,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:25:58,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:25:58,794 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:25:58,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:25:58,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:25:58,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:25:58,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:25:58,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:25:58,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:25:58,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:25:58,798 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:25:58,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:25:58,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:25:58,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:25:58,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:25:58,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:25:58,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:25:58,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:25:58,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:25:58,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:25:58,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:25:58,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:25:58,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:25:58,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:25:59,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:25:59,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:25:59,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:25:59,300 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:25:59,301 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:25:59,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/functions_1-2.c [2020-12-22 04:25:59,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c21e263ce/2944cef31aed4e05b96700b4a45d1a43/FLAGee6a25b97 [2020-12-22 04:26:00,176 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:26:00,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/functions_1-2.c [2020-12-22 04:26:00,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c21e263ce/2944cef31aed4e05b96700b4a45d1a43/FLAGee6a25b97 [2020-12-22 04:26:00,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c21e263ce/2944cef31aed4e05b96700b4a45d1a43 [2020-12-22 04:26:00,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:26:00,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:26:00,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:26:00,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:26:00,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:26:00,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:26:00" (1/1) ... [2020-12-22 04:26:00,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5576f1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:00, skipping insertion in model container [2020-12-22 04:26:00,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:26:00" (1/1) ... [2020-12-22 04:26:00,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:26:00,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:26:00,725 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/functions_1-2.c[325,338] [2020-12-22 04:26:00,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:26:00,748 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:26:00,764 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/functions_1-2.c[325,338] [2020-12-22 04:26:00,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:26:00,784 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:26:00,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:00 WrapperNode [2020-12-22 04:26:00,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:26:00,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:26:00,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:26:00,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:26:00,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:00" (1/1) ... [2020-12-22 04:26:00,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:00" (1/1) ... [2020-12-22 04:26:00,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:26:00,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:26:00,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:26:00,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:26:00,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:00" (1/1) ... [2020-12-22 04:26:00,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:00" (1/1) ... [2020-12-22 04:26:00,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:00" (1/1) ... [2020-12-22 04:26:00,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:00" (1/1) ... [2020-12-22 04:26:00,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:00" (1/1) ... [2020-12-22 04:26:00,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:00" (1/1) ... [2020-12-22 04:26:00,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:00" (1/1) ... [2020-12-22 04:26:00,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:26:00,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:26:00,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:26:00,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:26:00,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:00" (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 [2020-12-22 04:26:00,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:26:00,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:26:00,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:26:00,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:26:01,209 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:26:01,209 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 04:26:01,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:26:01 BoogieIcfgContainer [2020-12-22 04:26:01,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:26:01,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:26:01,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:26:01,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:26:01,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:26:00" (1/3) ... [2020-12-22 04:26:01,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2161eb46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:26:01, skipping insertion in model container [2020-12-22 04:26:01,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:00" (2/3) ... [2020-12-22 04:26:01,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2161eb46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:26:01, skipping insertion in model container [2020-12-22 04:26:01,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:26:01" (3/3) ... [2020-12-22 04:26:01,222 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-2.c [2020-12-22 04:26:01,230 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:26:01,235 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:26:01,258 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:26:01,290 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:26:01,291 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:26:01,291 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:26:01,291 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:26:01,291 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:26:01,292 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:26:01,292 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:26:01,292 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:26:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-22 04:26:01,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:26:01,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:01,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:26:01,317 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash 889635821, now seen corresponding path program 1 times [2020-12-22 04:26:01,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:01,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95305532] [2020-12-22 04:26:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:01,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95305532] [2020-12-22 04:26:01,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:26:01,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:26:01,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434053316] [2020-12-22 04:26:01,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:26:01,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:01,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:26:01,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:01,723 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-12-22 04:26:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:01,766 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-22 04:26:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:26:01,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:26:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:01,781 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:26:01,781 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:26:01,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:01,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:26:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-22 04:26:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:26:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 04:26:01,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2020-12-22 04:26:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:01,824 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 04:26:01,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:26:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 04:26:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:26:01,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:01,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:01,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:26:01,826 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:01,827 INFO L82 PathProgramCache]: Analyzing trace with hash 294764431, now seen corresponding path program 1 times [2020-12-22 04:26:01,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:01,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864688554] [2020-12-22 04:26:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:01,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864688554] [2020-12-22 04:26:01,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576472847] [2020-12-22 04:26:01,981 INFO L95 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 [2020-12-22 04:26:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:02,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:26:02,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:02,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:02,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:26:02,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070947543] [2020-12-22 04:26:02,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:26:02,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:02,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:26:02,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:26:02,131 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2020-12-22 04:26:02,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:02,182 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-22 04:26:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:26:02,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 04:26:02,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:02,184 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:26:02,184 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:26:02,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:26:02,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:26:02,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-22 04:26:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:26:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-22 04:26:02,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2020-12-22 04:26:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:02,190 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-22 04:26:02,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:26:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-22 04:26:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:26:02,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:02,191 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:02,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:26:02,405 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:02,407 INFO L82 PathProgramCache]: Analyzing trace with hash -145990991, now seen corresponding path program 2 times [2020-12-22 04:26:02,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:02,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820716758] [2020-12-22 04:26:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:02,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820716758] [2020-12-22 04:26:02,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720900420] [2020-12-22 04:26:02,602 INFO L93 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 [2020-12-22 04:26:02,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:02,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:02,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:26:02,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:02,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:02,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:26:02,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243298440] [2020-12-22 04:26:02,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:26:02,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:02,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:26:02,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:26:02,729 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2020-12-22 04:26:02,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:02,812 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-22 04:26:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:26:02,812 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-22 04:26:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:02,813 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:26:02,813 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:26:02,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:26:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:26:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-22 04:26:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:26:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 04:26:02,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-12-22 04:26:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:02,819 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 04:26:02,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:26:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 04:26:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:26:02,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:02,821 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:03,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:03,035 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:03,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:03,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1489810771, now seen corresponding path program 3 times [2020-12-22 04:26:03,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:03,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498795506] [2020-12-22 04:26:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:03,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498795506] [2020-12-22 04:26:03,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435540762] [2020-12-22 04:26:03,189 INFO L93 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 [2020-12-22 04:26:03,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:26:03,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:03,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:26:03,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:03,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:03,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:26:03,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13377291] [2020-12-22 04:26:03,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:26:03,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:03,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:26:03,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:26:03,331 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2020-12-22 04:26:03,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:03,476 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-22 04:26:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:26:03,476 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-12-22 04:26:03,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:03,477 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:26:03,478 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:26:03,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:26:03,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:26:03,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-22 04:26:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:26:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-22 04:26:03,483 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-12-22 04:26:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:03,484 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-22 04:26:03,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:26:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-22 04:26:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:26:03,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:03,485 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:03,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:03,699 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:03,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:03,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1537273717, now seen corresponding path program 4 times [2020-12-22 04:26:03,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:03,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273736830] [2020-12-22 04:26:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:03,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273736830] [2020-12-22 04:26:03,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394962375] [2020-12-22 04:26:03,889 INFO L93 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 [2020-12-22 04:26:03,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:03,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:03,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:26:03,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:04,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:04,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:26:04,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422553037] [2020-12-22 04:26:04,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:26:04,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:04,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:26:04,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:26:04,051 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-12-22 04:26:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:04,275 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-22 04:26:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:26:04,275 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-22 04:26:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:04,276 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:26:04,276 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:26:04,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:26:04,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:26:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-22 04:26:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:26:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-22 04:26:04,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-12-22 04:26:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:04,283 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-22 04:26:04,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:26:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-22 04:26:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:26:04,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:04,284 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:04,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:04,498 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:04,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:04,500 INFO L82 PathProgramCache]: Analyzing trace with hash -95475433, now seen corresponding path program 5 times [2020-12-22 04:26:04,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:04,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287711562] [2020-12-22 04:26:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:04,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287711562] [2020-12-22 04:26:04,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599968164] [2020-12-22 04:26:04,719 INFO L93 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 [2020-12-22 04:26:04,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:26:04,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:04,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:26:04,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:04,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:04,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:26:04,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749928101] [2020-12-22 04:26:04,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:26:04,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:26:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:26:04,874 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 14 states. [2020-12-22 04:26:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:05,160 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-22 04:26:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:26:05,161 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-12-22 04:26:05,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:05,161 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:26:05,162 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:26:05,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:26:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:26:05,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 04:26:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:26:05,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 04:26:05,167 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-12-22 04:26:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:05,168 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 04:26:05,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:26:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 04:26:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:26:05,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:05,169 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:05,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:26:05,383 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:05,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:05,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1504345543, now seen corresponding path program 6 times [2020-12-22 04:26:05,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:05,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098291015] [2020-12-22 04:26:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:05,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098291015] [2020-12-22 04:26:05,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381314107] [2020-12-22 04:26:05,625 INFO L93 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 [2020-12-22 04:26:05,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:26:05,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:05,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:26:05,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:05,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:05,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:26:05,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684882885] [2020-12-22 04:26:05,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:26:05,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:05,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:26:05,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:26:05,802 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 16 states. [2020-12-22 04:26:06,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:06,156 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-22 04:26:06,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:26:06,157 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-22 04:26:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:06,158 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:26:06,158 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:26:06,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:26:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:26:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-22 04:26:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:26:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-22 04:26:06,164 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-12-22 04:26:06,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:06,165 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-22 04:26:06,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:26:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-22 04:26:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:26:06,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:06,166 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:06,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:06,380 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:06,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:06,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1781144283, now seen corresponding path program 7 times [2020-12-22 04:26:06,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:06,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573638431] [2020-12-22 04:26:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:06,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573638431] [2020-12-22 04:26:06,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122897471] [2020-12-22 04:26:06,675 INFO L93 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 [2020-12-22 04:26:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:06,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:26:06,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:06,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:06,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:26:06,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361283608] [2020-12-22 04:26:06,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:26:06,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:06,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:26:06,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:26:06,806 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 18 states. [2020-12-22 04:26:07,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:07,249 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 04:26:07,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:26:07,250 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2020-12-22 04:26:07,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:07,251 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:26:07,251 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:26:07,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:26:07,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:26:07,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-22 04:26:07,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:26:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-22 04:26:07,260 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-12-22 04:26:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:07,261 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-22 04:26:07,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:26:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-22 04:26:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:26:07,262 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:07,262 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:07,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:07,475 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1959062787, now seen corresponding path program 8 times [2020-12-22 04:26:07,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:07,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868910068] [2020-12-22 04:26:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:07,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868910068] [2020-12-22 04:26:07,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960473830] [2020-12-22 04:26:07,795 INFO L93 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 [2020-12-22 04:26:07,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:07,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:07,855 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:26:07,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:07,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:07,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 04:26:07,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885657148] [2020-12-22 04:26:07,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:26:07,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:07,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:26:07,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:26:07,968 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 20 states. [2020-12-22 04:26:08,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:08,515 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-22 04:26:08,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:26:08,516 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-12-22 04:26:08,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:08,517 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:26:08,517 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:26:08,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:26:08,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:26:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-22 04:26:08,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:26:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-22 04:26:08,524 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-12-22 04:26:08,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:08,524 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-22 04:26:08,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:26:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-22 04:26:08,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:26:08,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:08,525 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:08,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:26:08,739 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:08,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:08,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1410430305, now seen corresponding path program 9 times [2020-12-22 04:26:08,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:08,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096162120] [2020-12-22 04:26:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:09,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096162120] [2020-12-22 04:26:09,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340232484] [2020-12-22 04:26:09,222 INFO L93 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 [2020-12-22 04:26:09,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:26:09,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:09,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 04:26:09,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:09,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:09,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:26:09,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205129686] [2020-12-22 04:26:09,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:26:09,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:09,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:26:09,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:26:09,538 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 22 states. [2020-12-22 04:26:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:10,123 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-22 04:26:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:26:10,123 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-12-22 04:26:10,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:10,124 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:26:10,125 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:26:10,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=1419, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:26:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:26:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-22 04:26:10,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:26:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-22 04:26:10,132 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-12-22 04:26:10,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:10,132 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-22 04:26:10,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:26:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-22 04:26:10,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:26:10,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:10,133 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:10,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:10,337 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:10,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:10,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1839374785, now seen corresponding path program 10 times [2020-12-22 04:26:10,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:10,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052139247] [2020-12-22 04:26:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:10,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052139247] [2020-12-22 04:26:10,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769692143] [2020-12-22 04:26:10,819 INFO L93 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 [2020-12-22 04:26:10,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:10,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:10,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 04:26:10,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:10,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:10,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:26:10,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078102036] [2020-12-22 04:26:10,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:26:10,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:26:10,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:26:10,959 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 24 states. [2020-12-22 04:26:11,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:11,770 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-22 04:26:11,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:26:11,771 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-22 04:26:11,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:11,772 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:26:11,772 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:26:11,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=1736, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:26:11,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:26:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-22 04:26:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:26:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-22 04:26:11,778 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-12-22 04:26:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:11,779 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-22 04:26:11,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:26:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-22 04:26:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:26:11,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:11,780 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:11,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:11,995 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:11,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1834125213, now seen corresponding path program 11 times [2020-12-22 04:26:11,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:11,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690638254] [2020-12-22 04:26:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:12,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690638254] [2020-12-22 04:26:12,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275547464] [2020-12-22 04:26:12,520 INFO L93 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 [2020-12-22 04:26:13,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 04:26:13,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:13,004 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-22 04:26:13,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:13,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:13,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:26:13,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329960006] [2020-12-22 04:26:13,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:26:13,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:13,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:26:13,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:26:13,202 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2020-12-22 04:26:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:14,049 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-22 04:26:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:26:14,049 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-22 04:26:14,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:14,053 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:26:14,053 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:26:14,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=2085, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:26:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:26:14,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-22 04:26:14,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:26:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-22 04:26:14,074 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-12-22 04:26:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:14,075 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-22 04:26:14,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:26:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-22 04:26:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:26:14,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:14,078 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:14,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:26:14,283 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1604505979, now seen corresponding path program 12 times [2020-12-22 04:26:14,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:14,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378208288] [2020-12-22 04:26:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:14,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378208288] [2020-12-22 04:26:14,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222029230] [2020-12-22 04:26:14,966 INFO L93 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 [2020-12-22 04:26:15,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:26:15,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:15,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-22 04:26:15,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:15,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:15,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:26:15,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515958968] [2020-12-22 04:26:15,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:26:15,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:15,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:26:15,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:26:15,402 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 28 states. [2020-12-22 04:26:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:16,609 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-22 04:26:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:26:16,610 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2020-12-22 04:26:16,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:16,611 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:26:16,611 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:26:16,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=186, Invalid=2466, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:26:16,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:26:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-22 04:26:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:26:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-22 04:26:16,618 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-12-22 04:26:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:16,618 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-22 04:26:16,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:26:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-22 04:26:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:26:16,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:16,619 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:16,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:26:16,823 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:16,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:16,823 INFO L82 PathProgramCache]: Analyzing trace with hash 16245799, now seen corresponding path program 13 times [2020-12-22 04:26:16,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:16,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984178170] [2020-12-22 04:26:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:17,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984178170] [2020-12-22 04:26:17,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474809176] [2020-12-22 04:26:17,522 INFO L93 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 [2020-12-22 04:26:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:17,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 107 conjunts are in the unsatisfiable core [2020-12-22 04:26:17,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:17,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:17,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 04:26:17,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535853879] [2020-12-22 04:26:17,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:26:17,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:17,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:26:17,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:26:17,724 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 30 states. [2020-12-22 04:26:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:19,044 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-22 04:26:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:26:19,049 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2020-12-22 04:26:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:19,049 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:26:19,049 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:26:19,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=201, Invalid=2879, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:26:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:26:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-22 04:26:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:26:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-22 04:26:19,057 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-12-22 04:26:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:19,058 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-22 04:26:19,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:26:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-22 04:26:19,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:26:19,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:19,060 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:19,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:26:19,274 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:19,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:19,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1514423991, now seen corresponding path program 14 times [2020-12-22 04:26:19,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:19,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348929354] [2020-12-22 04:26:19,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:20,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348929354] [2020-12-22 04:26:20,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76980689] [2020-12-22 04:26:20,161 INFO L93 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 [2020-12-22 04:26:20,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:20,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:20,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 115 conjunts are in the unsatisfiable core [2020-12-22 04:26:20,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:20,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:20,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 04:26:20,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869431655] [2020-12-22 04:26:20,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:26:20,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:20,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:26:20,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:26:20,364 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 32 states. [2020-12-22 04:26:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:21,800 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-22 04:26:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:26:21,801 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 34 [2020-12-22 04:26:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:21,801 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:26:21,802 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:26:21,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=216, Invalid=3324, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:26:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:26:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-22 04:26:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:26:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-22 04:26:21,808 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-12-22 04:26:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:21,808 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-22 04:26:21,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:26:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-22 04:26:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:26:21,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:21,809 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:22,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:22,025 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:22,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:22,026 INFO L82 PathProgramCache]: Analyzing trace with hash 685690347, now seen corresponding path program 15 times [2020-12-22 04:26:22,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:22,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050788070] [2020-12-22 04:26:22,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:22,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050788070] [2020-12-22 04:26:22,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211388373] [2020-12-22 04:26:22,880 INFO L93 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 [2020-12-22 04:26:23,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 04:26:23,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:23,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 123 conjunts are in the unsatisfiable core [2020-12-22 04:26:23,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:23,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:23,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:26:23,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066754814] [2020-12-22 04:26:23,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:26:23,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:23,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:26:23,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:26:23,286 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 34 states. [2020-12-22 04:26:24,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:24,942 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-22 04:26:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:26:24,943 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 36 [2020-12-22 04:26:24,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:24,944 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:26:24,944 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:26:24,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=231, Invalid=3801, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:26:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:26:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-22 04:26:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:26:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-22 04:26:24,952 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-12-22 04:26:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:24,953 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-22 04:26:24,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:26:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-22 04:26:24,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:26:24,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:24,954 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:25,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:26:25,158 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:25,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:25,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1871659533, now seen corresponding path program 16 times [2020-12-22 04:26:25,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:25,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363339294] [2020-12-22 04:26:25,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:26,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363339294] [2020-12-22 04:26:26,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572406915] [2020-12-22 04:26:26,137 INFO L93 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 [2020-12-22 04:26:26,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:26,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:26,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 131 conjunts are in the unsatisfiable core [2020-12-22 04:26:26,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:26,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:26,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 04:26:26,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329032755] [2020-12-22 04:26:26,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:26:26,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:26,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:26:26,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:26:26,355 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 36 states. [2020-12-22 04:26:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:28,298 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-22 04:26:28,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:26:28,299 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 38 [2020-12-22 04:26:28,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:28,300 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:26:28,300 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:26:28,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=246, Invalid=4310, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:26:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:26:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-22 04:26:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:26:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-22 04:26:28,308 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-12-22 04:26:28,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:28,309 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-22 04:26:28,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:26:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-22 04:26:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:26:28,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:28,310 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:28,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:26:28,524 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:28,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:28,525 INFO L82 PathProgramCache]: Analyzing trace with hash -873253457, now seen corresponding path program 17 times [2020-12-22 04:26:28,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:28,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838311387] [2020-12-22 04:26:28,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:29,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838311387] [2020-12-22 04:26:29,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092014133] [2020-12-22 04:26:29,672 INFO L93 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 [2020-12-22 04:26:30,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 04:26:30,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:30,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 151 conjunts are in the unsatisfiable core [2020-12-22 04:26:30,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:31,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:31,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 04:26:31,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055020733] [2020-12-22 04:26:31,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:26:31,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:31,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:26:31,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:26:31,181 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 38 states. [2020-12-22 04:26:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:33,366 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-22 04:26:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:26:33,367 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2020-12-22 04:26:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:33,368 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:26:33,368 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:26:33,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=261, Invalid=4851, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 04:26:33,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:26:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-22 04:26:33,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:26:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-22 04:26:33,374 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-12-22 04:26:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:33,374 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-22 04:26:33,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:26:33,374 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-22 04:26:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:26:33,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:33,375 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:33,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:26:33,576 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:33,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1624717103, now seen corresponding path program 18 times [2020-12-22 04:26:33,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:33,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014955877] [2020-12-22 04:26:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:34,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014955877] [2020-12-22 04:26:34,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956788371] [2020-12-22 04:26:34,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:35,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:26:35,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:35,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 148 conjunts are in the unsatisfiable core [2020-12-22 04:26:35,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:35,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:35,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:26:35,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617432250] [2020-12-22 04:26:35,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:26:35,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:35,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:26:35,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:26:35,933 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 40 states. [2020-12-22 04:26:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:38,383 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-22 04:26:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:26:38,384 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2020-12-22 04:26:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:38,385 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:26:38,386 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:26:38,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=276, Invalid=5424, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 04:26:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:26:38,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-22 04:26:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:26:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-22 04:26:38,393 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-12-22 04:26:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:38,394 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-22 04:26:38,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:26:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-22 04:26:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:26:38,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:38,395 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:38,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:38,600 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:38,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:38,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2068192115, now seen corresponding path program 19 times [2020-12-22 04:26:38,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:38,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875993511] [2020-12-22 04:26:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:40,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875993511] [2020-12-22 04:26:40,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680530046] [2020-12-22 04:26:40,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:40,101 WARN L261 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 155 conjunts are in the unsatisfiable core [2020-12-22 04:26:40,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:40,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:40,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 04:26:40,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353550742] [2020-12-22 04:26:40,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:26:40,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:40,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:26:40,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:26:40,258 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 42 states. [2020-12-22 04:26:43,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:43,005 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-22 04:26:43,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:26:43,006 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 44 [2020-12-22 04:26:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:43,006 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:26:43,006 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:26:43,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=291, Invalid=6029, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 04:26:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:26:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-22 04:26:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:26:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-22 04:26:43,013 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-12-22 04:26:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:43,014 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-22 04:26:43,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:26:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-22 04:26:43,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:26:43,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:43,015 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:43,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:43,229 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:43,229 INFO L82 PathProgramCache]: Analyzing trace with hash -984003179, now seen corresponding path program 20 times [2020-12-22 04:26:43,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:43,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131921356] [2020-12-22 04:26:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:44,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131921356] [2020-12-22 04:26:44,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500743388] [2020-12-22 04:26:44,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:44,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:44,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:44,855 WARN L261 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 163 conjunts are in the unsatisfiable core [2020-12-22 04:26:44,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:45,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:45,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 04:26:45,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306857069] [2020-12-22 04:26:45,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:26:45,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:45,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:26:45,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:26:45,013 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 44 states. [2020-12-22 04:26:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:48,047 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-22 04:26:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:26:48,048 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 46 [2020-12-22 04:26:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:48,048 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:26:48,049 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:26:48,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=306, Invalid=6666, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 04:26:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:26:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-22 04:26:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:26:48,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-22 04:26:48,056 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-12-22 04:26:48,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:48,057 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-22 04:26:48,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:26:48,057 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-22 04:26:48,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:26:48,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:48,059 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:48,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:26:48,271 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:48,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:48,272 INFO L82 PathProgramCache]: Analyzing trace with hash -681017545, now seen corresponding path program 21 times [2020-12-22 04:26:48,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:48,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544663326] [2020-12-22 04:26:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:49,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544663326] [2020-12-22 04:26:49,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661019553] [2020-12-22 04:26:49,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:50,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:26:50,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:50,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 173 conjunts are in the unsatisfiable core [2020-12-22 04:26:50,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:50,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:50,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 04:26:50,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570716229] [2020-12-22 04:26:50,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:26:50,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:50,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:26:50,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:26:50,983 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 46 states. [2020-12-22 04:26:54,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:54,172 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-22 04:26:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:26:54,183 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 48 [2020-12-22 04:26:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:54,184 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:26:54,184 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 04:26:54,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=321, Invalid=7335, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 04:26:54,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 04:26:54,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-22 04:26:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:26:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-22 04:26:54,199 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-12-22 04:26:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:54,199 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-22 04:26:54,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:26:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-22 04:26:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:26:54,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:54,200 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:54,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:26:54,407 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:54,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1569599399, now seen corresponding path program 22 times [2020-12-22 04:26:54,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:54,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593976472] [2020-12-22 04:26:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:56,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593976472] [2020-12-22 04:26:56,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571805712] [2020-12-22 04:26:56,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:56,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:56,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:56,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 179 conjunts are in the unsatisfiable core [2020-12-22 04:26:56,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:56,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:56,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 04:26:56,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922346560] [2020-12-22 04:26:56,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:26:56,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:56,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:26:56,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:26:56,492 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 48 states. [2020-12-22 04:26:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:59,961 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-22 04:26:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:26:59,962 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 50 [2020-12-22 04:26:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:59,963 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:26:59,963 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:26:59,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=336, Invalid=8036, Unknown=0, NotChecked=0, Total=8372 [2020-12-22 04:26:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:26:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-22 04:26:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:26:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-22 04:26:59,972 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-12-22 04:26:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:59,972 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-22 04:26:59,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:26:59,972 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-22 04:26:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:26:59,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:59,973 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:00,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:00,174 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:00,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:00,175 INFO L82 PathProgramCache]: Analyzing trace with hash -798269189, now seen corresponding path program 23 times [2020-12-22 04:27:00,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:00,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088743000] [2020-12-22 04:27:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:02,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088743000] [2020-12-22 04:27:02,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342683905] [2020-12-22 04:27:02,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:04,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 04:27:04,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:04,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 207 conjunts are in the unsatisfiable core [2020-12-22 04:27:04,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:05,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:05,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 04:27:05,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681038861] [2020-12-22 04:27:05,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:27:05,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:05,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:27:05,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:27:05,395 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 50 states. [2020-12-22 04:27:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:09,217 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-22 04:27:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 04:27:09,217 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 52 [2020-12-22 04:27:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:09,218 INFO L225 Difference]: With dead ends: 60 [2020-12-22 04:27:09,218 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:27:09,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 32 SyntacticMatches, 21 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=351, Invalid=8769, Unknown=0, NotChecked=0, Total=9120 [2020-12-22 04:27:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:27:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-22 04:27:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:27:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-22 04:27:09,224 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-12-22 04:27:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:09,225 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-22 04:27:09,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:27:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-22 04:27:09,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:27:09,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:09,226 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:09,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:27:09,436 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:09,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1715687709, now seen corresponding path program 24 times [2020-12-22 04:27:09,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:09,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033558879] [2020-12-22 04:27:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:11,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033558879] [2020-12-22 04:27:11,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399074054] [2020-12-22 04:27:11,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:13,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:27:13,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:13,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 207 conjunts are in the unsatisfiable core [2020-12-22 04:27:13,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:14,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:14,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 04:27:14,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78808037] [2020-12-22 04:27:14,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 04:27:14,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:14,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 04:27:14,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:27:14,111 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 52 states. [2020-12-22 04:27:18,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:18,279 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-22 04:27:18,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 04:27:18,280 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 54 [2020-12-22 04:27:18,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:18,281 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:27:18,281 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:27:18,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 42 SyntacticMatches, 13 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=366, Invalid=9534, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 04:27:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:27:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-12-22 04:27:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 04:27:18,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-22 04:27:18,289 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-12-22 04:27:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:18,289 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-22 04:27:18,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 04:27:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-22 04:27:18,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:27:18,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:18,290 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:18,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:18,494 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:18,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:18,494 INFO L82 PathProgramCache]: Analyzing trace with hash -438320961, now seen corresponding path program 25 times [2020-12-22 04:27:18,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:18,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074444502] [2020-12-22 04:27:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:20,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074444502] [2020-12-22 04:27:20,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665436267] [2020-12-22 04:27:20,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:20,974 WARN L261 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 203 conjunts are in the unsatisfiable core [2020-12-22 04:27:20,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:21,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:21,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-22 04:27:21,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592923804] [2020-12-22 04:27:21,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 04:27:21,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:21,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 04:27:21,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:27:21,128 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 54 states. [2020-12-22 04:27:25,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:25,717 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-22 04:27:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:27:25,719 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 56 [2020-12-22 04:27:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:25,719 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:27:25,719 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:27:25,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=381, Invalid=10331, Unknown=0, NotChecked=0, Total=10712 [2020-12-22 04:27:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:27:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-22 04:27:25,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:27:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-22 04:27:25,725 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-12-22 04:27:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:25,725 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-22 04:27:25,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 04:27:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-22 04:27:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:27:25,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:25,726 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:25,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:27:25,941 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:25,942 INFO L82 PathProgramCache]: Analyzing trace with hash -266416159, now seen corresponding path program 26 times [2020-12-22 04:27:25,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:25,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575350029] [2020-12-22 04:27:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:28,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575350029] [2020-12-22 04:27:28,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738175336] [2020-12-22 04:27:28,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:28,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:28,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:28,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 211 conjunts are in the unsatisfiable core [2020-12-22 04:27:28,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:28,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:28,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-22 04:27:28,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318368475] [2020-12-22 04:27:28,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:27:28,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:28,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:27:28,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:27:28,707 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 56 states. [2020-12-22 04:27:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:33,511 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-22 04:27:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 04:27:33,512 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 58 [2020-12-22 04:27:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:33,513 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:27:33,513 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:27:33,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=396, Invalid=11160, Unknown=0, NotChecked=0, Total=11556 [2020-12-22 04:27:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:27:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-22 04:27:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:27:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-22 04:27:33,516 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-12-22 04:27:33,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:33,516 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-22 04:27:33,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:27:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-22 04:27:33,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:27:33,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:33,517 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:33,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:27:33,732 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:33,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:33,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1725341315, now seen corresponding path program 27 times [2020-12-22 04:27:33,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:33,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535941052] [2020-12-22 04:27:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:36,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535941052] [2020-12-22 04:27:36,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59146677] [2020-12-22 04:27:36,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:37,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 04:27:37,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:37,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 219 conjunts are in the unsatisfiable core [2020-12-22 04:27:37,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:37,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:37,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-22 04:27:37,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378117283] [2020-12-22 04:27:37,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 04:27:37,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:37,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 04:27:37,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:27:37,906 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 58 states. [2020-12-22 04:27:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:43,113 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-22 04:27:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 04:27:43,114 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 60 [2020-12-22 04:27:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:43,115 INFO L225 Difference]: With dead ends: 68 [2020-12-22 04:27:43,115 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:27:43,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=411, Invalid=12021, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 04:27:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:27:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-22 04:27:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 04:27:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-22 04:27:43,122 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-12-22 04:27:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:43,122 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-22 04:27:43,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 04:27:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-22 04:27:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:27:43,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:43,123 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:43,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:27:43,327 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:43,327 INFO L82 PathProgramCache]: Analyzing trace with hash 248859813, now seen corresponding path program 28 times [2020-12-22 04:27:43,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:43,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313507651] [2020-12-22 04:27:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:46,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313507651] [2020-12-22 04:27:46,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557799757] [2020-12-22 04:27:46,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:46,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:46,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:46,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 227 conjunts are in the unsatisfiable core [2020-12-22 04:27:46,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:46,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:46,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-22 04:27:46,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156948262] [2020-12-22 04:27:46,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 04:27:46,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:46,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 04:27:46,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:27:46,479 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 60 states. [2020-12-22 04:27:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:52,299 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-22 04:27:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 04:27:52,300 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 62 [2020-12-22 04:27:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:52,301 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:27:52,301 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:27:52,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=426, Invalid=12914, Unknown=0, NotChecked=0, Total=13340 [2020-12-22 04:27:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:27:52,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-22 04:27:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 04:27:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-22 04:27:52,306 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-12-22 04:27:52,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:52,307 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-22 04:27:52,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 04:27:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-22 04:27:52,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:27:52,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:52,307 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:52,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:27:52,508 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:52,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:52,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1310655929, now seen corresponding path program 29 times [2020-12-22 04:27:52,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:52,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794756352] [2020-12-22 04:27:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:55,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794756352] [2020-12-22 04:27:55,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468423519] [2020-12-22 04:27:55,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:11,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 04:28:11,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:11,416 WARN L261 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 253 conjunts are in the unsatisfiable core [2020-12-22 04:28:11,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:12,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:12,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-22 04:28:12,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967369119] [2020-12-22 04:28:12,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 04:28:12,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:12,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 04:28:12,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:28:12,999 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 62 states. [2020-12-22 04:28:19,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:19,042 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-12-22 04:28:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 04:28:19,045 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 64 [2020-12-22 04:28:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:19,046 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:28:19,046 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:28:19,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 46 SyntacticMatches, 19 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=441, Invalid=13839, Unknown=0, NotChecked=0, Total=14280 [2020-12-22 04:28:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:28:19,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-22 04:28:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:28:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-22 04:28:19,051 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-12-22 04:28:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:19,051 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-22 04:28:19,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 04:28:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-22 04:28:19,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:28:19,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:19,052 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:19,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:19,257 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:19,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:19,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1061697687, now seen corresponding path program 30 times [2020-12-22 04:28:19,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:19,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210460680] [2020-12-22 04:28:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:22,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210460680] [2020-12-22 04:28:22,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881599374] [2020-12-22 04:28:22,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:26,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:28:26,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:26,404 WARN L261 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 268 conjunts are in the unsatisfiable core [2020-12-22 04:28:26,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:28,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:28,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-22 04:28:28,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25744539] [2020-12-22 04:28:28,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 04:28:28,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:28,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 04:28:28,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:28:28,599 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 64 states. [2020-12-22 04:28:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:35,320 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-12-22 04:28:35,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 04:28:35,321 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 66 [2020-12-22 04:28:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:35,322 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:28:35,322 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:28:35,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 41 SyntacticMatches, 26 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=456, Invalid=14796, Unknown=0, NotChecked=0, Total=15252 [2020-12-22 04:28:35,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:28:35,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-22 04:28:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:28:35,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-12-22 04:28:35,328 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-12-22 04:28:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:35,328 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-12-22 04:28:35,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 04:28:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-12-22 04:28:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 04:28:35,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:35,329 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:35,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:35,536 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:35,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1963971595, now seen corresponding path program 31 times [2020-12-22 04:28:35,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:35,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559967289] [2020-12-22 04:28:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:39,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559967289] [2020-12-22 04:28:39,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069408890] [2020-12-22 04:28:39,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:39,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 251 conjunts are in the unsatisfiable core [2020-12-22 04:28:39,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:39,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:39,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-22 04:28:39,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798324708] [2020-12-22 04:28:39,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 04:28:39,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:39,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 04:28:39,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 04:28:39,623 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 66 states. [2020-12-22 04:28:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:46,778 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-12-22 04:28:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 04:28:46,779 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 68 [2020-12-22 04:28:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:46,780 INFO L225 Difference]: With dead ends: 76 [2020-12-22 04:28:46,780 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:28:46,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=471, Invalid=15785, Unknown=0, NotChecked=0, Total=16256 [2020-12-22 04:28:46,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:28:46,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-22 04:28:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 04:28:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-12-22 04:28:46,786 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-12-22 04:28:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:46,786 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-12-22 04:28:46,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 04:28:46,787 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-12-22 04:28:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:28:46,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:46,787 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:46,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:46,995 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:46,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:46,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1939292205, now seen corresponding path program 32 times [2020-12-22 04:28:46,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:46,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991301415] [2020-12-22 04:28:46,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:50,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991301415] [2020-12-22 04:28:50,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987782563] [2020-12-22 04:28:50,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:51,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:28:51,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:51,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 259 conjunts are in the unsatisfiable core [2020-12-22 04:28:51,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:51,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:51,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-22 04:28:51,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958925784] [2020-12-22 04:28:51,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 04:28:51,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:51,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 04:28:51,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:28:51,285 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 68 states. [2020-12-22 04:28:58,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:58,936 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-22 04:28:58,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 04:28:58,937 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 70 [2020-12-22 04:28:58,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:58,938 INFO L225 Difference]: With dead ends: 78 [2020-12-22 04:28:58,938 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:28:58,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=486, Invalid=16806, Unknown=0, NotChecked=0, Total=17292 [2020-12-22 04:28:58,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:28:58,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-22 04:28:58,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 04:28:58,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-12-22 04:28:58,944 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-12-22 04:28:58,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:58,945 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-12-22 04:28:58,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 04:28:58,945 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-12-22 04:28:58,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:28:58,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:58,946 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:59,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:28:59,150 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:59,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:59,150 INFO L82 PathProgramCache]: Analyzing trace with hash -302765105, now seen corresponding path program 33 times [2020-12-22 04:28:59,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:59,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594446642] [2020-12-22 04:28:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:03,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594446642] [2020-12-22 04:29:03,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95155778] [2020-12-22 04:29:03,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:07,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 04:29:07,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:07,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 269 conjunts are in the unsatisfiable core [2020-12-22 04:29:07,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:07,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:07,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-22 04:29:07,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496617041] [2020-12-22 04:29:07,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 04:29:07,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:07,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 04:29:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:29:07,996 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 70 states. [2020-12-22 04:29:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:16,191 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-12-22 04:29:16,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 04:29:16,192 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 72 [2020-12-22 04:29:16,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:16,193 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:29:16,193 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 04:29:16,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=501, Invalid=17859, Unknown=0, NotChecked=0, Total=18360 [2020-12-22 04:29:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 04:29:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-22 04:29:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 04:29:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-12-22 04:29:16,199 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-12-22 04:29:16,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:16,199 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-12-22 04:29:16,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 04:29:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-12-22 04:29:16,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 04:29:16,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:16,200 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:16,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:16,405 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:16,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:16,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1153742577, now seen corresponding path program 34 times [2020-12-22 04:29:16,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:16,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058083248] [2020-12-22 04:29:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:21,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058083248] [2020-12-22 04:29:21,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637121061] [2020-12-22 04:29:21,003 INFO L93 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:21,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:29:21,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:21,108 WARN L261 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 275 conjunts are in the unsatisfiable core [2020-12-22 04:29:21,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:21,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:21,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-22 04:29:21,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069971063] [2020-12-22 04:29:21,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-22 04:29:21,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:21,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-22 04:29:21,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 04:29:21,384 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 72 states. [2020-12-22 04:29:30,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:30,168 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-12-22 04:29:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-22 04:29:30,168 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 74 [2020-12-22 04:29:30,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:30,169 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:29:30,170 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:29:30,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=516, Invalid=18944, Unknown=0, NotChecked=0, Total=19460 [2020-12-22 04:29:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:29:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-22 04:29:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 04:29:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-12-22 04:29:30,176 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-12-22 04:29:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:30,176 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-12-22 04:29:30,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-22 04:29:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-12-22 04:29:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:29:30,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:30,177 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:30,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:29:30,378 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:30,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:30,379 INFO L82 PathProgramCache]: Analyzing trace with hash 698286483, now seen corresponding path program 35 times [2020-12-22 04:29:30,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:30,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186939779] [2020-12-22 04:29:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:35,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186939779] [2020-12-22 04:29:35,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285871437] [2020-12-22 04:29:35,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:06,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 04:30:06,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:30:06,264 WARN L261 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 312 conjunts are in the unsatisfiable core [2020-12-22 04:30:06,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:30:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:30:09,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:30:09,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-22 04:30:09,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045784357] [2020-12-22 04:30:09,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 04:30:09,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:30:09,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 04:30:09,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 04:30:09,165 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 74 states.