/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:27:31,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:27:31,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:27:31,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 04:27:31,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:27:31,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:27:31,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:27:31,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:27:31,429 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:27:31,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:27:31,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:27:31,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:27:31,431 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:27:31,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:27:31,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:27:31,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:27:31,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:27:31,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:27:31,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:27:31,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:27:31,433 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:27:31,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:27:31,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:27:31,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:27:31,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:27:31,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:27:31,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:27:31,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:27:31,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:27:31,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:27:31,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:27:31,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:27:31,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:27:31,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:27:31,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:27:31,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:27:31,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:27:31,819 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:27:31,819 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:27:31,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_3.i [2020-12-22 04:27:31,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6694fd88b/c3deb69d430544658bd97e63da26d2db/FLAGf8f9313fe [2020-12-22 04:27:32,483 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:27:32,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_3.i [2020-12-22 04:27:32,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6694fd88b/c3deb69d430544658bd97e63da26d2db/FLAGf8f9313fe [2020-12-22 04:27:32,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6694fd88b/c3deb69d430544658bd97e63da26d2db [2020-12-22 04:27:32,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:27:32,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:27:32,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:27:32,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:27:32,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:27:32,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:27:32" (1/1) ... [2020-12-22 04:27:32,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11e87a1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:32, skipping insertion in model container [2020-12-22 04:27:32,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:27:32" (1/1) ... [2020-12-22 04:27:32,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:27:32,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:27:33,120 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_3.i[920,933] [2020-12-22 04:27:33,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:27:33,143 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:27:33,157 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_3.i[920,933] [2020-12-22 04:27:33,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:27:33,180 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:27:33,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:33 WrapperNode [2020-12-22 04:27:33,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:27:33,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:27:33,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:27:33,183 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:27:33,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:33" (1/1) ... [2020-12-22 04:27:33,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:33" (1/1) ... [2020-12-22 04:27:33,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:27:33,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:27:33,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:27:33,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:27:33,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:33" (1/1) ... [2020-12-22 04:27:33,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:33" (1/1) ... [2020-12-22 04:27:33,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:33" (1/1) ... [2020-12-22 04:27:33,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:33" (1/1) ... [2020-12-22 04:27:33,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:33" (1/1) ... [2020-12-22 04:27:33,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:33" (1/1) ... [2020-12-22 04:27:33,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:33" (1/1) ... [2020-12-22 04:27:33,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:27:33,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:27:33,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:27:33,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:27:33,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:27:33,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:27:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:27:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:27:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:27:33,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:27:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:27:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:27:33,733 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:27:33,734 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 04:27:33,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:27:33 BoogieIcfgContainer [2020-12-22 04:27:33,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:27:33,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:27:33,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:27:33,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:27:33,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:27:32" (1/3) ... [2020-12-22 04:27:33,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15c43987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:27:33, skipping insertion in model container [2020-12-22 04:27:33,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:33" (2/3) ... [2020-12-22 04:27:33,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15c43987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:27:33, skipping insertion in model container [2020-12-22 04:27:33,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:27:33" (3/3) ... [2020-12-22 04:27:33,776 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2020-12-22 04:27:33,791 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:27:33,821 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:27:33,850 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:27:33,876 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:27:33,877 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:27:33,877 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:27:33,877 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:27:33,877 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:27:33,877 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:27:33,878 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:27:33,878 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:27:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-22 04:27:33,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:27:33,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:33,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:33,898 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:33,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:33,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1156778892, now seen corresponding path program 1 times [2020-12-22 04:27:33,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:33,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464398779] [2020-12-22 04:27:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:34,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464398779] [2020-12-22 04:27:34,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:27:34,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:27:34,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881715033] [2020-12-22 04:27:34,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:27:34,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:34,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:27:34,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:27:34,310 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-12-22 04:27:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:34,420 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-12-22 04:27:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:27:34,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 04:27:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:34,431 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:27:34,431 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:27:34,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:27:34,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:27:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2020-12-22 04:27:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:27:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-22 04:27:34,474 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2020-12-22 04:27:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:34,474 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-22 04:27:34,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:27:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-22 04:27:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:27:34,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:34,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:34,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:27:34,478 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1156719310, now seen corresponding path program 1 times [2020-12-22 04:27:34,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:34,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300903484] [2020-12-22 04:27:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:34,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300903484] [2020-12-22 04:27:34,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:27:34,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:27:34,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146005044] [2020-12-22 04:27:34,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:27:34,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:34,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:27:34,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:27:34,585 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-12-22 04:27:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:34,633 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-12-22 04:27:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:27:34,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 04:27:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:34,636 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:27:34,636 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:27:34,637 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 [2020-12-22 04:27:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:27:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2020-12-22 04:27:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:27:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-22 04:27:34,647 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2020-12-22 04:27:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:34,648 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-22 04:27:34,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:27:34,648 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-22 04:27:34,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:27:34,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:34,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:34,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:27:34,651 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:34,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:34,653 INFO L82 PathProgramCache]: Analyzing trace with hash 723292333, now seen corresponding path program 1 times [2020-12-22 04:27:34,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:34,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298580640] [2020-12-22 04:27:34,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:34,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298580640] [2020-12-22 04:27:34,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562422596] [2020-12-22 04:27:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:34,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:27:34,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:34,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:34,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:27:34,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236840745] [2020-12-22 04:27:34,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:27:34,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:34,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:27:34,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:27:34,910 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2020-12-22 04:27:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:35,006 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-12-22 04:27:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:27:35,006 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 04:27:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:35,007 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:27:35,008 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:27:35,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:27:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:27:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 16. [2020-12-22 04:27:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:27:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-22 04:27:35,014 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-12-22 04:27:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:35,014 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-22 04:27:35,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:27:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-22 04:27:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:27:35,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:35,016 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:35,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:27:35,230 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:35,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1125888878, now seen corresponding path program 2 times [2020-12-22 04:27:35,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:35,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619194097] [2020-12-22 04:27:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:35,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619194097] [2020-12-22 04:27:35,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615945687] [2020-12-22 04:27:35,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:35,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:35,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:35,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:27:35,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:35,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:35,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:27:35,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151202924] [2020-12-22 04:27:35,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:27:35,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:35,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:27:35,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:27:35,514 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-12-22 04:27:35,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:35,624 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-12-22 04:27:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:27:35,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 04:27:35,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:35,627 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:27:35,627 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 04:27:35,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:27:35,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 04:27:35,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 17. [2020-12-22 04:27:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:27:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-22 04:27:35,635 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2020-12-22 04:27:35,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:35,635 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-22 04:27:35,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:27:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-22 04:27:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:27:35,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:35,636 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:35,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:35,851 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:35,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:35,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1679035725, now seen corresponding path program 3 times [2020-12-22 04:27:35,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:35,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228236471] [2020-12-22 04:27:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:36,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228236471] [2020-12-22 04:27:36,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255404220] [2020-12-22 04:27:36,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:36,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:27:36,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:36,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:27:36,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:36,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:36,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:27:36,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799526815] [2020-12-22 04:27:36,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:27:36,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:36,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:27:36,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:27:36,169 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2020-12-22 04:27:36,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:36,298 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-12-22 04:27:36,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:27:36,299 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-22 04:27:36,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:36,300 INFO L225 Difference]: With dead ends: 69 [2020-12-22 04:27:36,300 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:27:36,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:27:36,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:27:36,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 18. [2020-12-22 04:27:36,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 04:27:36,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-22 04:27:36,306 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2020-12-22 04:27:36,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:36,307 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-22 04:27:36,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:27:36,307 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-22 04:27:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:27:36,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:36,308 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:36,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:36,522 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:36,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1562614798, now seen corresponding path program 4 times [2020-12-22 04:27:36,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:36,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843182872] [2020-12-22 04:27:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:36,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843182872] [2020-12-22 04:27:36,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296436810] [2020-12-22 04:27:36,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:36,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:36,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:36,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:27:36,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:36,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:36,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:27:36,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831056990] [2020-12-22 04:27:36,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:27:36,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:36,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:27:36,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:27:36,892 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 8 states. [2020-12-22 04:27:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:37,082 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-12-22 04:27:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:27:37,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-22 04:27:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:37,084 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:27:37,084 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 04:27:37,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:27:37,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 04:27:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 19. [2020-12-22 04:27:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:27:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-22 04:27:37,090 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-12-22 04:27:37,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:37,090 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-22 04:27:37,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:27:37,091 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-22 04:27:37,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:27:37,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:37,091 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:37,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:37,305 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:37,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:37,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1025434093, now seen corresponding path program 5 times [2020-12-22 04:27:37,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:37,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401983381] [2020-12-22 04:27:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:37,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401983381] [2020-12-22 04:27:37,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447440633] [2020-12-22 04:27:37,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:37,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 04:27:37,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:37,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:27:37,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:37,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:37,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:27:37,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024935924] [2020-12-22 04:27:37,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:27:37,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:37,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:27:37,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:27:37,694 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 9 states. [2020-12-22 04:27:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:37,860 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2020-12-22 04:27:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:27:37,861 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-22 04:27:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:37,862 INFO L225 Difference]: With dead ends: 91 [2020-12-22 04:27:37,862 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:27:37,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:27:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:27:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 20. [2020-12-22 04:27:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:27:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-22 04:27:37,869 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2020-12-22 04:27:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:37,870 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-22 04:27:37,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:27:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-22 04:27:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:27:37,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:37,871 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:38,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:27:38,085 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:38,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:38,087 INFO L82 PathProgramCache]: Analyzing trace with hash -349428910, now seen corresponding path program 6 times [2020-12-22 04:27:38,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:38,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671930931] [2020-12-22 04:27:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:38,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671930931] [2020-12-22 04:27:38,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579595210] [2020-12-22 04:27:38,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:38,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 04:27:38,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:27:38,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:38,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:38,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:27:38,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519933418] [2020-12-22 04:27:38,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:27:38,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:27:38,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:27:38,396 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2020-12-22 04:27:38,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:38,599 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2020-12-22 04:27:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:27:38,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-12-22 04:27:38,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:38,601 INFO L225 Difference]: With dead ends: 102 [2020-12-22 04:27:38,601 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 04:27:38,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:27:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 04:27:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 21. [2020-12-22 04:27:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:27:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-22 04:27:38,608 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2020-12-22 04:27:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:38,608 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-22 04:27:38,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:27:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-22 04:27:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:27:38,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:38,610 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:38,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:38,824 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:38,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:38,826 INFO L82 PathProgramCache]: Analyzing trace with hash -20509043, now seen corresponding path program 7 times [2020-12-22 04:27:38,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:38,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757658525] [2020-12-22 04:27:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:38,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757658525] [2020-12-22 04:27:38,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601475872] [2020-12-22 04:27:38,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:39,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:27:39,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:39,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:39,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:27:39,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704631396] [2020-12-22 04:27:39,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:27:39,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:39,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:27:39,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:27:39,123 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 11 states. [2020-12-22 04:27:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:39,369 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2020-12-22 04:27:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:27:39,370 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-12-22 04:27:39,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:39,371 INFO L225 Difference]: With dead ends: 113 [2020-12-22 04:27:39,371 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 04:27:39,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:27:39,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 04:27:39,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 22. [2020-12-22 04:27:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:27:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-22 04:27:39,378 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-12-22 04:27:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:39,378 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-22 04:27:39,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:27:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-22 04:27:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:27:39,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:39,379 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:39,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:39,593 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:39,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:39,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1586072242, now seen corresponding path program 8 times [2020-12-22 04:27:39,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:39,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006289492] [2020-12-22 04:27:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:39,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006289492] [2020-12-22 04:27:39,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165432325] [2020-12-22 04:27:39,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:39,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:39,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:39,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:27:39,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:39,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:39,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:27:39,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029017037] [2020-12-22 04:27:39,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:27:39,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:39,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:27:39,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:27:39,918 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 12 states. [2020-12-22 04:27:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:40,201 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2020-12-22 04:27:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:27:40,202 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-12-22 04:27:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:40,203 INFO L225 Difference]: With dead ends: 124 [2020-12-22 04:27:40,203 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 04:27:40,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:27:40,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 04:27:40,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 23. [2020-12-22 04:27:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:27:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-22 04:27:40,210 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-12-22 04:27:40,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:40,210 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-22 04:27:40,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:27:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-22 04:27:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:27:40,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:40,211 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:40,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:27:40,427 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:40,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:40,428 INFO L82 PathProgramCache]: Analyzing trace with hash -149515475, now seen corresponding path program 9 times [2020-12-22 04:27:40,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:40,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120455397] [2020-12-22 04:27:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:40,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120455397] [2020-12-22 04:27:40,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729981941] [2020-12-22 04:27:40,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:41,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:27:41,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:41,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:27:41,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:41,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:41,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:27:41,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509740842] [2020-12-22 04:27:41,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:27:41,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:41,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:27:41,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:27:41,160 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 13 states. [2020-12-22 04:27:41,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:41,492 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2020-12-22 04:27:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:27:41,492 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2020-12-22 04:27:41,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:41,494 INFO L225 Difference]: With dead ends: 135 [2020-12-22 04:27:41,495 INFO L226 Difference]: Without dead ends: 124 [2020-12-22 04:27:41,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:27:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-22 04:27:41,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 24. [2020-12-22 04:27:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:27:41,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-22 04:27:41,506 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-12-22 04:27:41,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:41,506 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-22 04:27:41,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:27:41,507 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-22 04:27:41,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:27:41,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:41,510 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:41,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:41,713 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:41,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1881840146, now seen corresponding path program 10 times [2020-12-22 04:27:41,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:41,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834762339] [2020-12-22 04:27:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:41,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834762339] [2020-12-22 04:27:41,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703002498] [2020-12-22 04:27:41,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:41,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:41,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:41,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:27:41,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:42,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:42,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:27:42,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503860454] [2020-12-22 04:27:42,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:27:42,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:42,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:27:42,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:27:42,052 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2020-12-22 04:27:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:42,435 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2020-12-22 04:27:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:27:42,436 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-12-22 04:27:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:42,437 INFO L225 Difference]: With dead ends: 146 [2020-12-22 04:27:42,438 INFO L226 Difference]: Without dead ends: 135 [2020-12-22 04:27:42,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:27:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-22 04:27:42,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 25. [2020-12-22 04:27:42,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:27:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-22 04:27:42,448 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2020-12-22 04:27:42,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:42,451 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-22 04:27:42,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:27:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-22 04:27:42,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:27:42,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:42,453 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:42,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:42,667 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:42,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:42,668 INFO L82 PathProgramCache]: Analyzing trace with hash 429354957, now seen corresponding path program 11 times [2020-12-22 04:27:42,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:42,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268152517] [2020-12-22 04:27:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:42,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268152517] [2020-12-22 04:27:42,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145914289] [2020-12-22 04:27:42,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:45,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 04:27:45,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:45,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:27:45,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:45,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:45,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:27:45,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062305272] [2020-12-22 04:27:45,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:27:45,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:45,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:27:45,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:27:45,963 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 15 states. [2020-12-22 04:27:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:46,428 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2020-12-22 04:27:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:27:46,429 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-12-22 04:27:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:46,430 INFO L225 Difference]: With dead ends: 157 [2020-12-22 04:27:46,430 INFO L226 Difference]: Without dead ends: 146 [2020-12-22 04:27:46,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:27:46,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-22 04:27:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 26. [2020-12-22 04:27:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:27:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-22 04:27:46,438 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2020-12-22 04:27:46,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:46,438 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-22 04:27:46,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:27:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-22 04:27:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:27:46,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:46,439 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:46,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:27:46,644 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:46,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:46,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1648012942, now seen corresponding path program 12 times [2020-12-22 04:27:46,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:46,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202558596] [2020-12-22 04:27:46,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:46,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202558596] [2020-12-22 04:27:46,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471959087] [2020-12-22 04:27:46,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:48,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:27:48,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:48,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:27:48,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:48,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:48,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:27:48,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145949981] [2020-12-22 04:27:48,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:27:48,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:48,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:27:48,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:27:48,809 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 16 states. [2020-12-22 04:27:49,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:49,312 INFO L93 Difference]: Finished difference Result 168 states and 185 transitions. [2020-12-22 04:27:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:27:49,313 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-12-22 04:27:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:49,314 INFO L225 Difference]: With dead ends: 168 [2020-12-22 04:27:49,314 INFO L226 Difference]: Without dead ends: 157 [2020-12-22 04:27:49,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:27:49,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-22 04:27:49,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 27. [2020-12-22 04:27:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:27:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-22 04:27:49,321 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-12-22 04:27:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:49,321 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-22 04:27:49,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:27:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-22 04:27:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:27:49,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:49,322 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:49,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:27:49,535 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:49,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:49,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1621908371, now seen corresponding path program 13 times [2020-12-22 04:27:49,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:49,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34409851] [2020-12-22 04:27:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:49,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34409851] [2020-12-22 04:27:49,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577054217] [2020-12-22 04:27:49,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:49,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:27:49,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:49,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:49,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:27:49,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735038399] [2020-12-22 04:27:49,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:27:49,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:49,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:27:49,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:27:49,963 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 17 states. [2020-12-22 04:27:50,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:50,569 INFO L93 Difference]: Finished difference Result 179 states and 197 transitions. [2020-12-22 04:27:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:27:50,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2020-12-22 04:27:50,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:50,571 INFO L225 Difference]: With dead ends: 179 [2020-12-22 04:27:50,571 INFO L226 Difference]: Without dead ends: 168 [2020-12-22 04:27:50,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:27:50,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-22 04:27:50,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 28. [2020-12-22 04:27:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:27:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 04:27:50,583 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-12-22 04:27:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:50,584 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 04:27:50,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:27:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 04:27:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:27:50,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:50,586 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:50,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:27:50,787 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:50,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash -812666670, now seen corresponding path program 14 times [2020-12-22 04:27:50,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:50,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578467253] [2020-12-22 04:27:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:51,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578467253] [2020-12-22 04:27:51,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904849629] [2020-12-22 04:27:51,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:51,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:51,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:27:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:51,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:51,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:27:51,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538171853] [2020-12-22 04:27:51,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:27:51,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:51,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:27:51,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:27:51,348 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 18 states. [2020-12-22 04:27:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:52,001 INFO L93 Difference]: Finished difference Result 190 states and 209 transitions. [2020-12-22 04:27:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:27:52,002 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-12-22 04:27:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:52,003 INFO L225 Difference]: With dead ends: 190 [2020-12-22 04:27:52,003 INFO L226 Difference]: Without dead ends: 179 [2020-12-22 04:27:52,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 12 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:27:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-22 04:27:52,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 29. [2020-12-22 04:27:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:27:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-22 04:27:52,011 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2020-12-22 04:27:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:52,011 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-22 04:27:52,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:27:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-22 04:27:52,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:27:52,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:52,012 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:52,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:52,227 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:52,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1495977715, now seen corresponding path program 15 times [2020-12-22 04:27:52,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:52,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929556101] [2020-12-22 04:27:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:52,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929556101] [2020-12-22 04:27:52,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794276889] [2020-12-22 04:27:52,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:55,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 04:27:55,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:55,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:27:55,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:56,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:56,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:27:56,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72519935] [2020-12-22 04:27:56,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:27:56,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:27:56,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:27:56,051 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 19 states. [2020-12-22 04:27:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:56,801 INFO L93 Difference]: Finished difference Result 201 states and 221 transitions. [2020-12-22 04:27:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:27:56,802 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 24 [2020-12-22 04:27:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:56,803 INFO L225 Difference]: With dead ends: 201 [2020-12-22 04:27:56,803 INFO L226 Difference]: Without dead ends: 190 [2020-12-22 04:27:56,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:27:56,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-22 04:27:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 30. [2020-12-22 04:27:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:27:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-22 04:27:56,810 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2020-12-22 04:27:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:56,811 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-22 04:27:56,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:27:56,811 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-22 04:27:56,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:27:56,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:56,812 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:57,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:27:57,018 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:57,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:57,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1203783630, now seen corresponding path program 16 times [2020-12-22 04:27:57,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:57,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594779740] [2020-12-22 04:27:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:57,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594779740] [2020-12-22 04:27:57,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216743483] [2020-12-22 04:27:57,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:57,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:57,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:27:57,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:57,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:57,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 04:27:57,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776910828] [2020-12-22 04:27:57,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:27:57,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:57,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:27:57,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:27:57,625 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 20 states. [2020-12-22 04:27:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:58,460 INFO L93 Difference]: Finished difference Result 212 states and 233 transitions. [2020-12-22 04:27:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:27:58,460 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2020-12-22 04:27:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:58,461 INFO L225 Difference]: With dead ends: 212 [2020-12-22 04:27:58,461 INFO L226 Difference]: Without dead ends: 201 [2020-12-22 04:27:58,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:27:58,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-22 04:27:58,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 31. [2020-12-22 04:27:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:27:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-22 04:27:58,468 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2020-12-22 04:27:58,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:58,469 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-22 04:27:58,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:27:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-22 04:27:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:27:58,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:58,470 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:58,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:27:58,685 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:58,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:58,686 INFO L82 PathProgramCache]: Analyzing trace with hash -735701587, now seen corresponding path program 17 times [2020-12-22 04:27:58,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:58,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067840869] [2020-12-22 04:27:58,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:58,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067840869] [2020-12-22 04:27:58,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772671624] [2020-12-22 04:27:58,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:15,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 04:28:15,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:16,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:28:16,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:16,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:16,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:28:16,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269464254] [2020-12-22 04:28:16,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:28:16,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:16,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:28:16,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:28:16,073 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 21 states. [2020-12-22 04:28:17,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:17,048 INFO L93 Difference]: Finished difference Result 223 states and 245 transitions. [2020-12-22 04:28:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:28:17,049 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-12-22 04:28:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:17,051 INFO L225 Difference]: With dead ends: 223 [2020-12-22 04:28:17,051 INFO L226 Difference]: Without dead ends: 212 [2020-12-22 04:28:17,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:28:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-22 04:28:17,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 32. [2020-12-22 04:28:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:28:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-22 04:28:17,059 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-12-22 04:28:17,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:17,059 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-22 04:28:17,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:28:17,059 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-22 04:28:17,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:28:17,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:17,060 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:17,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:17,268 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:17,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:17,269 INFO L82 PathProgramCache]: Analyzing trace with hash 889939858, now seen corresponding path program 18 times [2020-12-22 04:28:17,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:17,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678129932] [2020-12-22 04:28:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:17,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678129932] [2020-12-22 04:28:17,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616388958] [2020-12-22 04:28:17,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:36,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-22 04:28:36,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:36,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:28:36,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:36,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:36,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:28:36,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148900424] [2020-12-22 04:28:36,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:28:36,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:36,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:28:36,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:28:36,249 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 22 states. [2020-12-22 04:28:37,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:37,300 INFO L93 Difference]: Finished difference Result 234 states and 257 transitions. [2020-12-22 04:28:37,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:28:37,301 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-12-22 04:28:37,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:37,302 INFO L225 Difference]: With dead ends: 234 [2020-12-22 04:28:37,302 INFO L226 Difference]: Without dead ends: 223 [2020-12-22 04:28:37,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:28:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-22 04:28:37,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 33. [2020-12-22 04:28:37,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:28:37,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-22 04:28:37,310 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-12-22 04:28:37,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:37,310 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-22 04:28:37,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:28:37,310 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-22 04:28:37,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:28:37,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:37,311 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:37,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:37,519 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:37,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:37,520 INFO L82 PathProgramCache]: Analyzing trace with hash -254782899, now seen corresponding path program 19 times [2020-12-22 04:28:37,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:37,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019838749] [2020-12-22 04:28:37,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:37,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019838749] [2020-12-22 04:28:37,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56217510] [2020-12-22 04:28:37,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:37,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 04:28:37,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:38,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:38,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:28:38,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842833635] [2020-12-22 04:28:38,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:28:38,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:38,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:28:38,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:28:38,296 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 23 states. [2020-12-22 04:28:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:39,449 INFO L93 Difference]: Finished difference Result 245 states and 269 transitions. [2020-12-22 04:28:39,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:28:39,449 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 28 [2020-12-22 04:28:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:39,450 INFO L225 Difference]: With dead ends: 245 [2020-12-22 04:28:39,450 INFO L226 Difference]: Without dead ends: 234 [2020-12-22 04:28:39,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 15 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:28:39,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-22 04:28:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 34. [2020-12-22 04:28:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:28:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-22 04:28:39,458 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 28 [2020-12-22 04:28:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:39,458 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-22 04:28:39,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:28:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-22 04:28:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:28:39,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:39,459 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:39,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:39,662 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:39,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:39,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1381449998, now seen corresponding path program 20 times [2020-12-22 04:28:39,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:39,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385081703] [2020-12-22 04:28:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:40,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385081703] [2020-12-22 04:28:40,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791496943] [2020-12-22 04:28:40,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:40,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:28:40,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:40,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 04:28:40,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:40,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:40,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:28:40,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012444364] [2020-12-22 04:28:40,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:28:40,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:40,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:28:40,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:28:40,453 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 24 states. [2020-12-22 04:28:41,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:41,748 INFO L93 Difference]: Finished difference Result 256 states and 281 transitions. [2020-12-22 04:28:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:28:41,748 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2020-12-22 04:28:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:41,750 INFO L225 Difference]: With dead ends: 256 [2020-12-22 04:28:41,750 INFO L226 Difference]: Without dead ends: 245 [2020-12-22 04:28:41,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 15 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:28:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-22 04:28:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 35. [2020-12-22 04:28:41,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:28:41,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-12-22 04:28:41,758 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2020-12-22 04:28:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:41,758 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-12-22 04:28:41,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:28:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-12-22 04:28:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:28:41,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:41,759 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:41,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:28:41,974 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:41,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:41,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1948391699, now seen corresponding path program 21 times [2020-12-22 04:28:41,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:41,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975328128] [2020-12-22 04:28:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:42,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975328128] [2020-12-22 04:28:42,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432171675] [2020-12-22 04:28:42,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:02,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 04:29:02,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:02,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:29:02,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:02,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:02,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:29:02,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709260308] [2020-12-22 04:29:02,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:29:02,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:02,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:29:02,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:29:02,136 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 25 states. [2020-12-22 04:29:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:03,629 INFO L93 Difference]: Finished difference Result 267 states and 293 transitions. [2020-12-22 04:29:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:29:03,630 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 30 [2020-12-22 04:29:03,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:03,631 INFO L225 Difference]: With dead ends: 267 [2020-12-22 04:29:03,631 INFO L226 Difference]: Without dead ends: 256 [2020-12-22 04:29:03,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:29:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-22 04:29:03,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 36. [2020-12-22 04:29:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 04:29:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-22 04:29:03,639 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-12-22 04:29:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:03,639 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-22 04:29:03,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:29:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-22 04:29:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:29:03,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:03,640 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:03,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:29:03,841 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:03,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1951252050, now seen corresponding path program 22 times [2020-12-22 04:29:03,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:03,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205734966] [2020-12-22 04:29:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:04,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205734966] [2020-12-22 04:29:04,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475140761] [2020-12-22 04:29:04,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:04,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:29:04,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:04,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 04:29:04,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:04,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:04,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:29:04,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216756199] [2020-12-22 04:29:04,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:29:04,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:04,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:29:04,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:29:04,855 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 26 states. [2020-12-22 04:29:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:06,534 INFO L93 Difference]: Finished difference Result 278 states and 305 transitions. [2020-12-22 04:29:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:29:06,535 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 31 [2020-12-22 04:29:06,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:06,537 INFO L225 Difference]: With dead ends: 278 [2020-12-22 04:29:06,537 INFO L226 Difference]: Without dead ends: 267 [2020-12-22 04:29:06,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 18 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:29:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-22 04:29:06,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 37. [2020-12-22 04:29:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:29:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-22 04:29:06,545 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2020-12-22 04:29:06,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:06,545 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-22 04:29:06,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:29:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-22 04:29:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:29:06,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:06,547 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:06,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:06,756 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:06,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:06,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1713843315, now seen corresponding path program 23 times [2020-12-22 04:29:06,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:06,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042275305] [2020-12-22 04:29:06,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:07,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042275305] [2020-12-22 04:29:07,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241846033] [2020-12-22 04:29:07,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:09,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 04:30:09,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:30:09,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:30:09,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:30:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:30:09,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:30:09,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:30:09,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844575309] [2020-12-22 04:30:09,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:30:09,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:30:09,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:30:09,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:30:09,384 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 27 states. [2020-12-22 04:30:11,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:30:11,164 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2020-12-22 04:30:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:30:11,164 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2020-12-22 04:30:11,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:30:11,165 INFO L225 Difference]: With dead ends: 289 [2020-12-22 04:30:11,165 INFO L226 Difference]: Without dead ends: 278 [2020-12-22 04:30:11,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:30:11,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-22 04:30:11,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 38. [2020-12-22 04:30:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:30:11,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-22 04:30:11,174 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2020-12-22 04:30:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:30:11,174 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-22 04:30:11,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:30:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-22 04:30:11,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:30:11,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:30:11,175 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:30:11,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:30:11,376 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:30:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:30:11,377 INFO L82 PathProgramCache]: Analyzing trace with hash 632317362, now seen corresponding path program 24 times [2020-12-22 04:30:11,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:30:11,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678396924] [2020-12-22 04:30:11,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:30:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:30:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:30:11,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678396924] [2020-12-22 04:30:11,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083383463] [2020-12-22 04:30:11,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true