/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/array-examples/standard_init3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:33:37,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:33:37,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:33:37,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:33:37,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:33:37,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:33:37,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:33:37,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:33:37,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:33:37,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:33:37,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:33:37,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-21 21:33:37,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:33:37,457 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:33:37,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:33:37,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:33:37,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:33:37,461 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:33:37,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:33:37,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:33:37,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:33:37,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:33:37,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:33:37,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:33:37,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:33:37,465 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:33:37,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:33:37,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:33:37,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:33:37,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:33:37,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:33:37,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:33:37,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:33:37,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:33:37,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:33:37,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:33:37,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:33:37,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:33:37,468 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:33:37,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:33:37,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:33:37,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:33:37,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:33:37,973 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:33:37,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init3_ground-2.i [2020-12-21 21:33:38,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad6524460/223c6051600f412c9d3ed14d120d76bd/FLAG3b4241965 [2020-12-21 21:33:38,821 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:33:38,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init3_ground-2.i [2020-12-21 21:33:38,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad6524460/223c6051600f412c9d3ed14d120d76bd/FLAG3b4241965 [2020-12-21 21:33:39,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad6524460/223c6051600f412c9d3ed14d120d76bd [2020-12-21 21:33:39,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:33:39,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:33:39,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:33:39,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:33:39,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:33:39,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:33:39" (1/1) ... [2020-12-21 21:33:39,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65176aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:39, skipping insertion in model container [2020-12-21 21:33:39,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:33:39" (1/1) ... [2020-12-21 21:33:39,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:33:39,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:33:39,369 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/array-examples/standard_init3_ground-2.i[816,829] [2020-12-21 21:33:39,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:33:39,399 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:33:39,414 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/array-examples/standard_init3_ground-2.i[816,829] [2020-12-21 21:33:39,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:33:39,436 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:33:39,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:39 WrapperNode [2020-12-21 21:33:39,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:33:39,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:33:39,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:33:39,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:33:39,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:39" (1/1) ... [2020-12-21 21:33:39,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:39" (1/1) ... [2020-12-21 21:33:39,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:33:39,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:33:39,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:33:39,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:33:39,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:39" (1/1) ... [2020-12-21 21:33:39,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:39" (1/1) ... [2020-12-21 21:33:39,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:39" (1/1) ... [2020-12-21 21:33:39,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:39" (1/1) ... [2020-12-21 21:33:39,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:39" (1/1) ... [2020-12-21 21:33:39,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:39" (1/1) ... [2020-12-21 21:33:39,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:39" (1/1) ... [2020-12-21 21:33:39,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:33:39,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:33:39,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:33:39,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:33:39,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:39" (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 [2020-12-21 21:33:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:33:39,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:33:39,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:33:39,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:33:39,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:33:39,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:33:39,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:33:39,901 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:33:39,901 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 21:33:39,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:33:39 BoogieIcfgContainer [2020-12-21 21:33:39,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:33:39,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:33:39,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:33:39,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:33:39,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:33:39" (1/3) ... [2020-12-21 21:33:39,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f99f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:33:39, skipping insertion in model container [2020-12-21 21:33:39,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:39" (2/3) ... [2020-12-21 21:33:39,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f99f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:33:39, skipping insertion in model container [2020-12-21 21:33:39,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:33:39" (3/3) ... [2020-12-21 21:33:39,914 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-2.i [2020-12-21 21:33:39,930 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:33:39,944 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:33:40,009 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:33:40,084 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:33:40,085 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:33:40,085 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:33:40,085 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:33:40,085 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:33:40,085 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:33:40,086 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:33:40,086 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:33:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-21 21:33:40,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:33:40,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:40,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:40,120 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:40,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:40,131 INFO L82 PathProgramCache]: Analyzing trace with hash -93359874, now seen corresponding path program 1 times [2020-12-21 21:33:40,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:40,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477468657] [2020-12-21 21:33:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:33:40,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477468657] [2020-12-21 21:33:40,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:33:40,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:33:40,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121827215] [2020-12-21 21:33:40,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:33:40,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:40,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:33:40,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:33:40,471 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-12-21 21:33:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:40,532 INFO L93 Difference]: Finished difference Result 36 states and 56 transitions. [2020-12-21 21:33:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:33:40,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 21:33:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:40,545 INFO L225 Difference]: With dead ends: 36 [2020-12-21 21:33:40,546 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 21:33:40,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:33:40,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 21:33:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-21 21:33:40,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 21:33:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-21 21:33:40,589 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2020-12-21 21:33:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:40,590 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-21 21:33:40,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:33:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-21 21:33:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:33:40,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:40,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:40,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:33:40,592 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:40,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:40,593 INFO L82 PathProgramCache]: Analyzing trace with hash -168681064, now seen corresponding path program 1 times [2020-12-21 21:33:40,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:40,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044232368] [2020-12-21 21:33:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:33:40,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044232368] [2020-12-21 21:33:40,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153771651] [2020-12-21 21:33:40,704 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 [2020-12-21 21:33:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:40,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:33:40,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:33:40,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:40,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:33:40,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904008242] [2020-12-21 21:33:40,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:33:40,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:40,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:33:40,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:33:40,873 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-12-21 21:33:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:40,929 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-12-21 21:33:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:33:40,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 21:33:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:40,932 INFO L225 Difference]: With dead ends: 33 [2020-12-21 21:33:40,932 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 21:33:40,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:33:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 21:33:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-21 21:33:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 21:33:40,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-21 21:33:40,940 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2020-12-21 21:33:40,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:40,940 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-21 21:33:40,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:33:40,941 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-21 21:33:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:33:40,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:40,942 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:41,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:33:41,156 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:41,158 INFO L82 PathProgramCache]: Analyzing trace with hash -873526594, now seen corresponding path program 2 times [2020-12-21 21:33:41,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:41,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706522762] [2020-12-21 21:33:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:33:41,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706522762] [2020-12-21 21:33:41,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317663986] [2020-12-21 21:33:41,269 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 [2020-12-21 21:33:41,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:33:41,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:41,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:33:41,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:33:41,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:41,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:33:41,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055823593] [2020-12-21 21:33:41,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:33:41,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:41,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:33:41,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:33:41,368 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2020-12-21 21:33:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:41,462 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-12-21 21:33:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:33:41,462 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-21 21:33:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:41,463 INFO L225 Difference]: With dead ends: 38 [2020-12-21 21:33:41,463 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 21:33:41,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:33:41,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 21:33:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-21 21:33:41,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:33:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-21 21:33:41,477 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-12-21 21:33:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:41,477 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-21 21:33:41,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:33:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-21 21:33:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:33:41,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:41,479 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:41,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:41,709 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:41,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:41,711 INFO L82 PathProgramCache]: Analyzing trace with hash -778322088, now seen corresponding path program 3 times [2020-12-21 21:33:41,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:41,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402493350] [2020-12-21 21:33:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:33:41,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402493350] [2020-12-21 21:33:41,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779987453] [2020-12-21 21:33:41,818 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 [2020-12-21 21:33:41,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:33:41,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:41,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:33:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:33:41,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:41,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:33:41,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235059116] [2020-12-21 21:33:41,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:33:41,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:41,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:33:41,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:33:41,979 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 7 states. [2020-12-21 21:33:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:42,028 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-12-21 21:33:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:33:42,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-21 21:33:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:42,029 INFO L225 Difference]: With dead ends: 43 [2020-12-21 21:33:42,029 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:33:42,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:33:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:33:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-21 21:33:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:33:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-21 21:33:42,036 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2020-12-21 21:33:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:42,037 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-21 21:33:42,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:33:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-21 21:33:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 21:33:42,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:42,038 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:42,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:42,253 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:42,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1736848510, now seen corresponding path program 4 times [2020-12-21 21:33:42,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:42,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635146222] [2020-12-21 21:33:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 21:33:42,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635146222] [2020-12-21 21:33:42,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833453202] [2020-12-21 21:33:42,378 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 [2020-12-21 21:33:42,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:33:42,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:42,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:33:42,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 21:33:42,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:42,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:33:42,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934422717] [2020-12-21 21:33:42,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:33:42,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:42,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:33:42,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:33:42,500 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2020-12-21 21:33:42,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:42,543 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-12-21 21:33:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:33:42,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-21 21:33:42,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:42,545 INFO L225 Difference]: With dead ends: 48 [2020-12-21 21:33:42,545 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 21:33:42,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:33:42,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 21:33:42,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-21 21:33:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 21:33:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-12-21 21:33:42,551 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2020-12-21 21:33:42,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:42,552 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-12-21 21:33:42,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:33:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-12-21 21:33:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 21:33:42,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:42,553 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:42,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:42,768 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:42,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1884156648, now seen corresponding path program 5 times [2020-12-21 21:33:42,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:42,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096457509] [2020-12-21 21:33:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-21 21:33:42,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096457509] [2020-12-21 21:33:42,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119988202] [2020-12-21 21:33:42,856 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 [2020-12-21 21:33:43,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 21:33:43,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:43,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:33:43,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-21 21:33:43,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:43,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:33:43,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677975113] [2020-12-21 21:33:43,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:33:43,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:43,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:33:43,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:33:43,106 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2020-12-21 21:33:43,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:43,171 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-12-21 21:33:43,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:33:43,171 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-12-21 21:33:43,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:43,172 INFO L225 Difference]: With dead ends: 53 [2020-12-21 21:33:43,173 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:33:43,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:33:43,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:33:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-21 21:33:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 21:33:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-21 21:33:43,180 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 26 [2020-12-21 21:33:43,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:43,180 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-21 21:33:43,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:33:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-21 21:33:43,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:33:43,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:43,181 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:43,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:33:43,396 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1909780030, now seen corresponding path program 6 times [2020-12-21 21:33:43,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:43,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252005823] [2020-12-21 21:33:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-21 21:33:43,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252005823] [2020-12-21 21:33:43,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933787979] [2020-12-21 21:33:43,519 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 [2020-12-21 21:33:43,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 21:33:43,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:43,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:33:43,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-21 21:33:43,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:43,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:33:43,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760184481] [2020-12-21 21:33:43,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:33:43,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:43,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:33:43,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:33:43,779 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2020-12-21 21:33:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:43,849 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-12-21 21:33:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:33:43,850 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-12-21 21:33:43,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:43,851 INFO L225 Difference]: With dead ends: 58 [2020-12-21 21:33:43,851 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:33:43,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:33:43,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:33:43,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-21 21:33:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 21:33:43,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-12-21 21:33:43,860 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2020-12-21 21:33:43,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:43,860 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-12-21 21:33:43,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:33:43,860 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-12-21 21:33:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:33:43,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:43,861 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:44,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:44,071 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:44,073 INFO L82 PathProgramCache]: Analyzing trace with hash -571143464, now seen corresponding path program 7 times [2020-12-21 21:33:44,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:44,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897470934] [2020-12-21 21:33:44,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-21 21:33:44,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897470934] [2020-12-21 21:33:44,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009803998] [2020-12-21 21:33:44,187 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 [2020-12-21 21:33:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:44,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:33:44,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-21 21:33:44,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:44,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:33:44,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082376019] [2020-12-21 21:33:44,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:33:44,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:44,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:33:44,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:33:44,310 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2020-12-21 21:33:44,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:44,380 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-12-21 21:33:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:33:44,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-12-21 21:33:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:44,381 INFO L225 Difference]: With dead ends: 63 [2020-12-21 21:33:44,381 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:33:44,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:33:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:33:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-21 21:33:44,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:33:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-12-21 21:33:44,388 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2020-12-21 21:33:44,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:44,389 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-12-21 21:33:44,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:33:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-12-21 21:33:44,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:33:44,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:44,390 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:44,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:44,604 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:44,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1115371518, now seen corresponding path program 8 times [2020-12-21 21:33:44,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:44,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050544562] [2020-12-21 21:33:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:33:44,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050544562] [2020-12-21 21:33:44,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869586194] [2020-12-21 21:33:44,753 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 [2020-12-21 21:33:44,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:33:44,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:33:44,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:33:44,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:44,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:33:44,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267850134] [2020-12-21 21:33:44,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:33:44,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:44,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:33:44,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:33:44,915 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2020-12-21 21:33:44,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:44,994 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-12-21 21:33:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:33:44,995 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-12-21 21:33:44,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:44,996 INFO L225 Difference]: With dead ends: 68 [2020-12-21 21:33:44,996 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 21:33:44,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:33:44,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 21:33:45,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-21 21:33:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 21:33:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-12-21 21:33:45,004 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2020-12-21 21:33:45,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:45,005 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-12-21 21:33:45,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:33:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-12-21 21:33:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 21:33:45,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:45,006 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:45,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:33:45,220 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:45,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:45,221 INFO L82 PathProgramCache]: Analyzing trace with hash -953894760, now seen corresponding path program 9 times [2020-12-21 21:33:45,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:45,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851785411] [2020-12-21 21:33:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-21 21:33:45,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851785411] [2020-12-21 21:33:45,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11772536] [2020-12-21 21:33:45,371 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 [2020-12-21 21:33:46,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:33:46,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:46,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:33:46,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-21 21:33:46,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:46,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:33:46,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009685193] [2020-12-21 21:33:46,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:33:46,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:46,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:33:46,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:33:46,657 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2020-12-21 21:33:46,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:46,727 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-12-21 21:33:46,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:33:46,728 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-12-21 21:33:46,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:46,729 INFO L225 Difference]: With dead ends: 73 [2020-12-21 21:33:46,729 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:33:46,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:33:46,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:33:46,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-21 21:33:46,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:33:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-12-21 21:33:46,736 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 38 [2020-12-21 21:33:46,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:46,736 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-12-21 21:33:46,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:33:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-12-21 21:33:46,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:33:46,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:46,737 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:46,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:46,954 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:46,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:46,955 INFO L82 PathProgramCache]: Analyzing trace with hash -468119106, now seen corresponding path program 10 times [2020-12-21 21:33:46,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:46,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903389874] [2020-12-21 21:33:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-21 21:33:47,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903389874] [2020-12-21 21:33:47,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760220558] [2020-12-21 21:33:47,155 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 [2020-12-21 21:33:47,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:33:47,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:47,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:33:47,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-21 21:33:47,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:47,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:33:47,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069992388] [2020-12-21 21:33:47,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:33:47,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:33:47,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:33:47,296 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 14 states. [2020-12-21 21:33:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:47,387 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-12-21 21:33:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:33:47,388 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-12-21 21:33:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:47,389 INFO L225 Difference]: With dead ends: 78 [2020-12-21 21:33:47,390 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 21:33:47,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:33:47,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 21:33:47,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-21 21:33:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-21 21:33:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-12-21 21:33:47,409 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2020-12-21 21:33:47,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:47,410 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-12-21 21:33:47,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:33:47,410 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-12-21 21:33:47,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-21 21:33:47,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:47,412 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:47,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:47,626 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1291774376, now seen corresponding path program 11 times [2020-12-21 21:33:47,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:47,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535903409] [2020-12-21 21:33:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-12-21 21:33:47,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535903409] [2020-12-21 21:33:47,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3707582] [2020-12-21 21:33:47,821 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 [2020-12-21 21:33:51,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-21 21:33:51,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:51,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:33:51,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-12-21 21:33:52,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:52,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:33:52,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597347532] [2020-12-21 21:33:52,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:33:52,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:33:52,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:33:52,040 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 15 states. [2020-12-21 21:33:52,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:52,127 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-12-21 21:33:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:33:52,128 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-12-21 21:33:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:52,128 INFO L225 Difference]: With dead ends: 83 [2020-12-21 21:33:52,129 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 21:33:52,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:33:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 21:33:52,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-21 21:33:52,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 21:33:52,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-12-21 21:33:52,136 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2020-12-21 21:33:52,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:52,136 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-12-21 21:33:52,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:33:52,136 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-12-21 21:33:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:33:52,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:52,137 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:52,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:33:52,352 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:52,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:52,353 INFO L82 PathProgramCache]: Analyzing trace with hash 340687742, now seen corresponding path program 12 times [2020-12-21 21:33:52,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:52,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496780755] [2020-12-21 21:33:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-21 21:33:52,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496780755] [2020-12-21 21:33:52,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700608658] [2020-12-21 21:33:52,543 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 [2020-12-21 21:33:54,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:33:54,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:54,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:33:54,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-21 21:33:54,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:54,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:33:54,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95058925] [2020-12-21 21:33:54,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:33:54,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:54,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:33:54,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:33:54,502 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 16 states. [2020-12-21 21:33:54,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:54,578 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-12-21 21:33:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:33:54,579 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-12-21 21:33:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:54,579 INFO L225 Difference]: With dead ends: 88 [2020-12-21 21:33:54,579 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 21:33:54,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:33:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 21:33:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-21 21:33:54,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 21:33:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-12-21 21:33:54,586 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2020-12-21 21:33:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:54,587 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-12-21 21:33:54,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:33:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-12-21 21:33:54,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 21:33:54,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:54,588 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:54,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:33:54,805 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:54,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1716134936, now seen corresponding path program 13 times [2020-12-21 21:33:54,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:54,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785343398] [2020-12-21 21:33:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-21 21:33:55,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785343398] [2020-12-21 21:33:55,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354494035] [2020-12-21 21:33:55,049 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 [2020-12-21 21:33:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:55,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:33:55,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-21 21:33:55,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:55,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:33:55,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134071900] [2020-12-21 21:33:55,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:33:55,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:55,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:33:55,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:33:55,234 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2020-12-21 21:33:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:55,336 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2020-12-21 21:33:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:33:55,336 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-12-21 21:33:55,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:55,337 INFO L225 Difference]: With dead ends: 93 [2020-12-21 21:33:55,337 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:33:55,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:33:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:33:55,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-21 21:33:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:33:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-12-21 21:33:55,344 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 50 [2020-12-21 21:33:55,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:55,345 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-12-21 21:33:55,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:33:55,345 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-12-21 21:33:55,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:33:55,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:55,346 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:55,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:33:55,559 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:55,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:55,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1136358718, now seen corresponding path program 14 times [2020-12-21 21:33:55,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:55,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91406720] [2020-12-21 21:33:55,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:33:55,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91406720] [2020-12-21 21:33:55,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20099460] [2020-12-21 21:33:55,818 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 [2020-12-21 21:33:55,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:33:55,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:55,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:33:55,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:33:55,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:55,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:33:55,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669939713] [2020-12-21 21:33:55,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:33:55,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:55,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:33:55,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:33:55,983 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 18 states. [2020-12-21 21:33:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:56,087 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-12-21 21:33:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:33:56,088 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-12-21 21:33:56,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:56,089 INFO L225 Difference]: With dead ends: 98 [2020-12-21 21:33:56,089 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 21:33:56,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:33:56,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 21:33:56,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-21 21:33:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:33:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-12-21 21:33:56,096 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2020-12-21 21:33:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:56,097 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-12-21 21:33:56,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:33:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-12-21 21:33:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:33:56,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:56,098 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:56,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:56,313 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:56,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:56,314 INFO L82 PathProgramCache]: Analyzing trace with hash 46129624, now seen corresponding path program 15 times [2020-12-21 21:33:56,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:56,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573872454] [2020-12-21 21:33:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-12-21 21:33:56,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573872454] [2020-12-21 21:33:56,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459235364] [2020-12-21 21:33:56,539 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 [2020-12-21 21:34:04,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 21:34:04,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:04,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:34:04,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-12-21 21:34:04,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:04,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:34:04,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520881410] [2020-12-21 21:34:04,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:34:04,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:04,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:34:04,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:34:04,812 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 19 states. [2020-12-21 21:34:04,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:04,924 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2020-12-21 21:34:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:34:04,924 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2020-12-21 21:34:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:04,927 INFO L225 Difference]: With dead ends: 103 [2020-12-21 21:34:04,927 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:34:04,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:34:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:34:04,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-21 21:34:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 21:34:04,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-12-21 21:34:04,941 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 56 [2020-12-21 21:34:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:04,941 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-12-21 21:34:04,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:34:04,941 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-12-21 21:34:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:34:04,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:04,943 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:05,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:34:05,157 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:05,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:05,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1778385154, now seen corresponding path program 16 times [2020-12-21 21:34:05,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:05,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722225269] [2020-12-21 21:34:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-21 21:34:05,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722225269] [2020-12-21 21:34:05,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037243422] [2020-12-21 21:34:05,402 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 [2020-12-21 21:34:05,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:34:05,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:05,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:34:05,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-21 21:34:05,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:05,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:34:05,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374313981] [2020-12-21 21:34:05,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:34:05,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:05,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:34:05,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:34:05,572 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 20 states. [2020-12-21 21:34:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:05,699 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-12-21 21:34:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:34:05,699 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-12-21 21:34:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:05,700 INFO L225 Difference]: With dead ends: 108 [2020-12-21 21:34:05,700 INFO L226 Difference]: Without dead ends: 65 [2020-12-21 21:34:05,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:34:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-21 21:34:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-21 21:34:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 21:34:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-12-21 21:34:05,707 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2020-12-21 21:34:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:05,708 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-12-21 21:34:05,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:34:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-12-21 21:34:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-21 21:34:05,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:05,709 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:05,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:34:05,922 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:05,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:05,923 INFO L82 PathProgramCache]: Analyzing trace with hash 119689112, now seen corresponding path program 17 times [2020-12-21 21:34:05,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:05,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034370993] [2020-12-21 21:34:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-12-21 21:34:06,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034370993] [2020-12-21 21:34:06,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880898194] [2020-12-21 21:34:06,166 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