/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-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:31:06,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:31:06,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:31:06,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 04:31:06,347 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:31:06,398 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:31:06,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:31:06,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:31:06,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:31:06,408 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:31:06,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:31:06,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:31:06,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:31:06,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:31:06,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:31:06,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:31:06,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:31:06,411 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:31:06,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:31:06,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:31:06,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:31:06,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:31:06,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:31:06,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:31:06,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:31:06,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:31:06,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:31:06,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:31:06,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:31:06,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:31:06,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:31:06,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:31:06,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:31:06,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:31:06,887 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:31:06,887 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:31:06,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2020-12-22 04:31:06,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d1948b32/334a9060626f48639fde79d23cf1de7d/FLAG406a8f682 [2020-12-22 04:31:07,564 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:31:07,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2020-12-22 04:31:07,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d1948b32/334a9060626f48639fde79d23cf1de7d/FLAG406a8f682 [2020-12-22 04:31:07,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d1948b32/334a9060626f48639fde79d23cf1de7d [2020-12-22 04:31:07,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:31:07,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:31:07,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:31:07,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:31:07,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:31:07,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:31:07" (1/1) ... [2020-12-22 04:31:07,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196318f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:07, skipping insertion in model container [2020-12-22 04:31:07,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:31:07" (1/1) ... [2020-12-22 04:31:07,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:31:08,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:31:08,249 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-invgen/string_concat-noarr.i[893,906] [2020-12-22 04:31:08,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:31:08,278 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:31:08,298 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-invgen/string_concat-noarr.i[893,906] [2020-12-22 04:31:08,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:31:08,329 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:31:08,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:08 WrapperNode [2020-12-22 04:31:08,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:31:08,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:31:08,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:31:08,333 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:31:08,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:08" (1/1) ... [2020-12-22 04:31:08,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:08" (1/1) ... [2020-12-22 04:31:08,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:31:08,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:31:08,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:31:08,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:31:08,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:08" (1/1) ... [2020-12-22 04:31:08,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:08" (1/1) ... [2020-12-22 04:31:08,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:08" (1/1) ... [2020-12-22 04:31:08,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:08" (1/1) ... [2020-12-22 04:31:08,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:08" (1/1) ... [2020-12-22 04:31:08,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:08" (1/1) ... [2020-12-22 04:31:08,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:08" (1/1) ... [2020-12-22 04:31:08,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:31:08,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:31:08,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:31:08,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:31:08,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:08" (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 04:31:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:31:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:31:08,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:31:08,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:31:08,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:31:08,792 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 04:31:08,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:31:08 BoogieIcfgContainer [2020-12-22 04:31:08,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:31:08,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:31:08,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:31:08,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:31:08,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:31:07" (1/3) ... [2020-12-22 04:31:08,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649260a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:31:08, skipping insertion in model container [2020-12-22 04:31:08,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:08" (2/3) ... [2020-12-22 04:31:08,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649260a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:31:08, skipping insertion in model container [2020-12-22 04:31:08,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:31:08" (3/3) ... [2020-12-22 04:31:08,811 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2020-12-22 04:31:08,819 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:31:08,824 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:31:08,846 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:31:08,892 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:31:08,892 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:31:08,892 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:31:08,892 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:31:08,893 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:31:08,893 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:31:08,893 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:31:08,893 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:31:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-22 04:31:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:31:08,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:08,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:08,921 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:08,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:08,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1270421808, now seen corresponding path program 1 times [2020-12-22 04:31:08,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:08,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882959269] [2020-12-22 04:31:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:09,130 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 04:31:09,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882959269] [2020-12-22 04:31:09,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:31:09,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:31:09,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045356974] [2020-12-22 04:31:09,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:31:09,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:09,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:31:09,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:31:09,161 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-22 04:31:09,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:09,181 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2020-12-22 04:31:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:31:09,183 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-22 04:31:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:09,200 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:31:09,201 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:31:09,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:31:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:31:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 04:31:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:31:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-22 04:31:09,239 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2020-12-22 04:31:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:09,240 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-22 04:31:09,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:31:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-22 04:31:09,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:31:09,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:09,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:09,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:31:09,243 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:09,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1947968043, now seen corresponding path program 1 times [2020-12-22 04:31:09,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:09,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240600518] [2020-12-22 04:31:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:09,438 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 04:31:09,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240600518] [2020-12-22 04:31:09,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:31:09,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:31:09,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393708867] [2020-12-22 04:31:09,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:31:09,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:09,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:31:09,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:31:09,445 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2020-12-22 04:31:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:09,544 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-12-22 04:31:09,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:31:09,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-22 04:31:09,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:09,548 INFO L225 Difference]: With dead ends: 21 [2020-12-22 04:31:09,548 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:31:09,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:31:09,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:31:09,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2020-12-22 04:31:09,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:31:09,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 04:31:09,558 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-12-22 04:31:09,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:09,559 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 04:31:09,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:31:09,562 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 04:31:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:31:09,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:09,563 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:09,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:31:09,564 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:09,567 INFO L82 PathProgramCache]: Analyzing trace with hash 653313584, now seen corresponding path program 1 times [2020-12-22 04:31:09,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:09,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718545415] [2020-12-22 04:31:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:09,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718545415] [2020-12-22 04:31:09,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407280504] [2020-12-22 04:31:09,661 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 04:31:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:09,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:31:09,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:09,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:09,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-22 04:31:09,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050769053] [2020-12-22 04:31:09,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:31:09,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:09,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:31:09,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:31:09,808 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-12-22 04:31:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:09,860 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-12-22 04:31:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:31:09,861 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-22 04:31:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:09,864 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:31:09,864 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:31:09,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:31:09,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:31:09,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2020-12-22 04:31:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:31:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-22 04:31:09,870 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-12-22 04:31:09,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:09,870 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-22 04:31:09,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:31:09,871 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-22 04:31:09,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:31:09,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:09,872 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:10,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:31:10,082 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:10,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:10,084 INFO L82 PathProgramCache]: Analyzing trace with hash 813990859, now seen corresponding path program 2 times [2020-12-22 04:31:10,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:10,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138167466] [2020-12-22 04:31:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:10,188 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 04:31:10,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138167466] [2020-12-22 04:31:10,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527288908] [2020-12-22 04:31:10,189 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 04:31:10,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:31:10,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:10,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:31:10,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:10,313 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 04:31:10,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:10,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-22 04:31:10,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10349929] [2020-12-22 04:31:10,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:31:10,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:10,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:31:10,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:31:10,318 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 8 states. [2020-12-22 04:31:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:10,393 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-12-22 04:31:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:31:10,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-22 04:31:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:10,398 INFO L225 Difference]: With dead ends: 35 [2020-12-22 04:31:10,398 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:31:10,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:31:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:31:10,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2020-12-22 04:31:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:31:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-22 04:31:10,412 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2020-12-22 04:31:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:10,412 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-22 04:31:10,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:31:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-22 04:31:10,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:31:10,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:10,414 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:10,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:10,628 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:10,629 INFO L82 PathProgramCache]: Analyzing trace with hash 606029478, now seen corresponding path program 3 times [2020-12-22 04:31:10,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:10,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813995737] [2020-12-22 04:31:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:10,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813995737] [2020-12-22 04:31:10,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614489255] [2020-12-22 04:31:10,692 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 04:31:10,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:31:10,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:10,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:31:10,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:10,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:10,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-22 04:31:10,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351596110] [2020-12-22 04:31:10,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:31:10,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:10,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:31:10,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:31:10,787 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 9 states. [2020-12-22 04:31:10,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:10,865 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-12-22 04:31:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:31:10,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-22 04:31:10,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:10,867 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:31:10,867 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:31:10,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:31:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:31:10,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-12-22 04:31:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:31:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-22 04:31:10,873 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2020-12-22 04:31:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:10,873 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-22 04:31:10,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:31:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-22 04:31:10,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:31:10,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:10,874 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:11,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:11,089 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:11,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:11,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1676362047, now seen corresponding path program 4 times [2020-12-22 04:31:11,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:11,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949777024] [2020-12-22 04:31:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:11,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949777024] [2020-12-22 04:31:11,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448856305] [2020-12-22 04:31:11,177 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 04:31:11,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:31:11,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:11,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:31:11,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:11,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:11,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-22 04:31:11,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881203834] [2020-12-22 04:31:11,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:31:11,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:11,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:31:11,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:31:11,294 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 10 states. [2020-12-22 04:31:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:11,353 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-12-22 04:31:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:31:11,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-22 04:31:11,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:11,355 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:31:11,355 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:31:11,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:31:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:31:11,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-12-22 04:31:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:31:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-22 04:31:11,360 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 19 [2020-12-22 04:31:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:11,360 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-22 04:31:11,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:31:11,361 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-22 04:31:11,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:31:11,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:11,362 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:11,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:11,576 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:11,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:11,577 INFO L82 PathProgramCache]: Analyzing trace with hash -326329316, now seen corresponding path program 5 times [2020-12-22 04:31:11,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:11,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428542615] [2020-12-22 04:31:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:11,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428542615] [2020-12-22 04:31:11,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305544044] [2020-12-22 04:31:11,664 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 04:31:11,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:31:11,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:11,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:31:11,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:11,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:11,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-12-22 04:31:11,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912677113] [2020-12-22 04:31:11,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:31:11,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:11,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:31:11,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:31:11,777 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 11 states. [2020-12-22 04:31:11,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:11,851 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-12-22 04:31:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:31:11,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-12-22 04:31:11,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:11,852 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:31:11,853 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:31:11,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:31:11,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:31:11,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-12-22 04:31:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:31:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-12-22 04:31:11,858 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 21 [2020-12-22 04:31:11,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:11,858 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-12-22 04:31:11,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:31:11,859 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-12-22 04:31:11,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:31:11,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:11,860 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:12,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:31:12,076 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash -24998217, now seen corresponding path program 6 times [2020-12-22 04:31:12,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:12,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030619357] [2020-12-22 04:31:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:12,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030619357] [2020-12-22 04:31:12,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489448453] [2020-12-22 04:31:12,188 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 04:31:12,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:31:12,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:12,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:31:12,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:12,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:12,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-22 04:31:12,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75300489] [2020-12-22 04:31:12,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:31:12,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:12,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:31:12,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:31:12,304 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 12 states. [2020-12-22 04:31:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:12,387 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-12-22 04:31:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:31:12,388 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-12-22 04:31:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:12,392 INFO L225 Difference]: With dead ends: 55 [2020-12-22 04:31:12,392 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 04:31:12,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:31:12,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 04:31:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-12-22 04:31:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:31:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-12-22 04:31:12,409 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 23 [2020-12-22 04:31:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:12,410 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-12-22 04:31:12,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:31:12,414 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-12-22 04:31:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:31:12,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:12,419 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:12,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:12,622 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:12,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:12,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1791379090, now seen corresponding path program 7 times [2020-12-22 04:31:12,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:12,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148233101] [2020-12-22 04:31:12,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:12,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148233101] [2020-12-22 04:31:12,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145364650] [2020-12-22 04:31:12,749 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 04:31:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:12,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:31:12,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:12,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:12,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-12-22 04:31:12,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29531771] [2020-12-22 04:31:12,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:31:12,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:12,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:31:12,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:31:12,888 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 13 states. [2020-12-22 04:31:12,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:12,989 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-12-22 04:31:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:31:12,989 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-12-22 04:31:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:12,990 INFO L225 Difference]: With dead ends: 60 [2020-12-22 04:31:12,990 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:31:12,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:31:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:31:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-12-22 04:31:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:31:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-12-22 04:31:12,995 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 25 [2020-12-22 04:31:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:12,996 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-12-22 04:31:12,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:31:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-12-22 04:31:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:31:12,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:12,997 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:13,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:13,211 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:13,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:13,212 INFO L82 PathProgramCache]: Analyzing trace with hash -721718355, now seen corresponding path program 8 times [2020-12-22 04:31:13,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:13,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620155565] [2020-12-22 04:31:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:13,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620155565] [2020-12-22 04:31:13,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451271088] [2020-12-22 04:31:13,344 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 04:31:13,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:31:13,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:13,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:31:13,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:13,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:13,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-22 04:31:13,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151801321] [2020-12-22 04:31:13,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:31:13,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:13,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:31:13,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:31:13,491 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 14 states. [2020-12-22 04:31:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:13,600 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-12-22 04:31:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:31:13,601 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-12-22 04:31:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:13,603 INFO L225 Difference]: With dead ends: 65 [2020-12-22 04:31:13,603 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 04:31:13,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:31:13,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 04:31:13,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-12-22 04:31:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:31:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-12-22 04:31:13,612 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 27 [2020-12-22 04:31:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:13,612 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-12-22 04:31:13,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:31:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-12-22 04:31:13,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:31:13,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:13,617 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:13,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:31:13,832 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:13,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2036742648, now seen corresponding path program 9 times [2020-12-22 04:31:13,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:13,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152166154] [2020-12-22 04:31:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:13,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152166154] [2020-12-22 04:31:13,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347797701] [2020-12-22 04:31:13,957 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 04:31:14,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:31:14,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:14,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:31:14,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:14,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:14,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-22 04:31:14,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570826662] [2020-12-22 04:31:14,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:31:14,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:14,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:31:14,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:31:14,096 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 15 states. [2020-12-22 04:31:14,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:14,202 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-12-22 04:31:14,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:31:14,203 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-12-22 04:31:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:14,203 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:31:14,204 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:31:14,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:31:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:31:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-12-22 04:31:14,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:31:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-12-22 04:31:14,208 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 29 [2020-12-22 04:31:14,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:14,209 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-12-22 04:31:14,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:31:14,209 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-12-22 04:31:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:31:14,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:14,210 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:14,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:14,417 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:14,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1240264099, now seen corresponding path program 10 times [2020-12-22 04:31:14,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:14,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617104667] [2020-12-22 04:31:14,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:14,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617104667] [2020-12-22 04:31:14,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554334791] [2020-12-22 04:31:14,583 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 04:31:14,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:31:14,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:14,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:31:14,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:14,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:14,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-12-22 04:31:14,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32419692] [2020-12-22 04:31:14,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:31:14,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:14,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:31:14,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:31:14,703 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 16 states. [2020-12-22 04:31:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:14,813 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-12-22 04:31:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:31:14,813 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-12-22 04:31:14,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:14,814 INFO L225 Difference]: With dead ends: 75 [2020-12-22 04:31:14,814 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 04:31:14,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:31:14,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 04:31:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-12-22 04:31:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 04:31:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-12-22 04:31:14,819 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 31 [2020-12-22 04:31:14,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:14,819 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-12-22 04:31:14,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:31:14,819 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-12-22 04:31:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:31:14,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:14,820 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:15,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:15,035 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:15,036 INFO L82 PathProgramCache]: Analyzing trace with hash -2062247298, now seen corresponding path program 11 times [2020-12-22 04:31:15,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:15,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109073097] [2020-12-22 04:31:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:15,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109073097] [2020-12-22 04:31:15,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716647215] [2020-12-22 04:31:15,212 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 04:31:15,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 04:31:15,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:15,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:31:15,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:15,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:15,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-22 04:31:15,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594025161] [2020-12-22 04:31:15,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:31:15,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:15,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:31:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:31:15,350 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 17 states. [2020-12-22 04:31:15,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:15,478 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-12-22 04:31:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:31:15,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-12-22 04:31:15,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:15,481 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:31:15,481 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 04:31:15,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:31:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 04:31:15,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2020-12-22 04:31:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:31:15,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-12-22 04:31:15,494 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 33 [2020-12-22 04:31:15,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:15,495 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-12-22 04:31:15,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:31:15,495 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-12-22 04:31:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:31:15,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:15,497 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:15,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:31:15,713 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:15,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:15,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1794868071, now seen corresponding path program 12 times [2020-12-22 04:31:15,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:15,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405415389] [2020-12-22 04:31:15,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:15,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405415389] [2020-12-22 04:31:15,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915918608] [2020-12-22 04:31:15,918 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 04:31:15,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:31:15,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:15,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:31:15,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:16,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:16,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-22 04:31:16,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737621123] [2020-12-22 04:31:16,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:31:16,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:16,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:31:16,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:31:16,065 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 18 states. [2020-12-22 04:31:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:16,189 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-12-22 04:31:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:31:16,189 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-12-22 04:31:16,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:16,190 INFO L225 Difference]: With dead ends: 85 [2020-12-22 04:31:16,190 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 04:31:16,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:31:16,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 04:31:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-12-22 04:31:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 04:31:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-12-22 04:31:16,194 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 35 [2020-12-22 04:31:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:16,195 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-12-22 04:31:16,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:31:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-12-22 04:31:16,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:31:16,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:16,196 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:16,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:31:16,410 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:16,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:16,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1753498612, now seen corresponding path program 13 times [2020-12-22 04:31:16,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:16,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615518885] [2020-12-22 04:31:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:16,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615518885] [2020-12-22 04:31:16,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128197329] [2020-12-22 04:31:16,618 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 04:31:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:16,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:31:16,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:16,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:16,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-22 04:31:16,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67635516] [2020-12-22 04:31:16,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:31:16,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:16,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:31:16,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:31:16,767 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 19 states. [2020-12-22 04:31:16,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:16,889 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-12-22 04:31:16,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:31:16,889 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-12-22 04:31:16,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:16,890 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:31:16,890 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:31:16,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:31:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:31:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-12-22 04:31:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 04:31:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2020-12-22 04:31:16,895 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 37 [2020-12-22 04:31:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:16,895 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2020-12-22 04:31:16,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:31:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2020-12-22 04:31:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:31:16,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:16,896 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:17,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:31:17,112 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:17,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:17,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1529847951, now seen corresponding path program 14 times [2020-12-22 04:31:17,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:17,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478798951] [2020-12-22 04:31:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:17,317 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 04:31:17,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478798951] [2020-12-22 04:31:17,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209111166] [2020-12-22 04:31:17,318 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 04:31:17,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:31:17,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:17,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:31:17,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:17,451 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 04:31:17,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:17,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-22 04:31:17,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895571142] [2020-12-22 04:31:17,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:31:17,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:17,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:31:17,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:31:17,453 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand 20 states. [2020-12-22 04:31:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:17,614 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2020-12-22 04:31:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:31:17,615 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-12-22 04:31:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:17,616 INFO L225 Difference]: With dead ends: 95 [2020-12-22 04:31:17,616 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 04:31:17,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:31:17,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 04:31:17,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2020-12-22 04:31:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 04:31:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2020-12-22 04:31:17,621 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 39 [2020-12-22 04:31:17,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:17,621 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2020-12-22 04:31:17,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:31:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2020-12-22 04:31:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:31:17,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:17,622 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:17,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:17,836 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:17,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1349927530, now seen corresponding path program 15 times [2020-12-22 04:31:17,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:17,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430830245] [2020-12-22 04:31:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:18,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430830245] [2020-12-22 04:31:18,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664076613] [2020-12-22 04:31:18,061 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 04:31:18,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 04:31:18,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:18,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:31:18,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:18,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:18,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-12-22 04:31:18,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530234723] [2020-12-22 04:31:18,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:31:18,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:18,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:31:18,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:31:18,274 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand 21 states. [2020-12-22 04:31:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:18,427 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2020-12-22 04:31:18,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:31:18,427 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-12-22 04:31:18,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:18,428 INFO L225 Difference]: With dead ends: 100 [2020-12-22 04:31:18,428 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 04:31:18,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=281, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:31:18,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 04:31:18,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2020-12-22 04:31:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 04:31:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-12-22 04:31:18,432 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 41 [2020-12-22 04:31:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:18,432 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-12-22 04:31:18,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:31:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-12-22 04:31:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:31:18,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:18,433 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:18,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:31:18,647 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:18,648 INFO L82 PathProgramCache]: Analyzing trace with hash 245094789, now seen corresponding path program 16 times [2020-12-22 04:31:18,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:18,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497128575] [2020-12-22 04:31:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:18,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497128575] [2020-12-22 04:31:18,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339014628] [2020-12-22 04:31:18,895 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 04:31:18,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:31:18,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:18,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:31:18,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:19,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:19,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-12-22 04:31:19,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813144363] [2020-12-22 04:31:19,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:31:19,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:19,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:31:19,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:31:19,079 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 22 states. [2020-12-22 04:31:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:19,254 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2020-12-22 04:31:19,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:31:19,254 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2020-12-22 04:31:19,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:19,255 INFO L225 Difference]: With dead ends: 105 [2020-12-22 04:31:19,255 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 04:31:19,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=306, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:31:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 04:31:19,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2020-12-22 04:31:19,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 04:31:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2020-12-22 04:31:19,259 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 43 [2020-12-22 04:31:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:19,261 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2020-12-22 04:31:19,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:31:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2020-12-22 04:31:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:31:19,262 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:19,263 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:19,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:31:19,477 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:19,478 INFO L82 PathProgramCache]: Analyzing trace with hash -642247200, now seen corresponding path program 17 times [2020-12-22 04:31:19,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:19,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904888428] [2020-12-22 04:31:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:19,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904888428] [2020-12-22 04:31:19,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862105059] [2020-12-22 04:31:19,750 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 04:31:19,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 04:31:19,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:19,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:31:19,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:19,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:19,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-12-22 04:31:19,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938275282] [2020-12-22 04:31:19,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:31:19,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:19,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:31:19,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:31:19,910 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand 23 states. [2020-12-22 04:31:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:20,112 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2020-12-22 04:31:20,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:31:20,114 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2020-12-22 04:31:20,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:20,115 INFO L225 Difference]: With dead ends: 110 [2020-12-22 04:31:20,115 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 04:31:20,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=332, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:31:20,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 04:31:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2020-12-22 04:31:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 04:31:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2020-12-22 04:31:20,120 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 45 [2020-12-22 04:31:20,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:20,120 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2020-12-22 04:31:20,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:31:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2020-12-22 04:31:20,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 04:31:20,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:20,121 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:20,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:20,336 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:20,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1320593275, now seen corresponding path program 18 times [2020-12-22 04:31:20,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:20,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291501235] [2020-12-22 04:31:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:20,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291501235] [2020-12-22 04:31:20,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305447775] [2020-12-22 04:31:20,671 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 04:31:20,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:31:20,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:20,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:31:20,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:20,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:20,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-12-22 04:31:20,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683568546] [2020-12-22 04:31:20,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:31:20,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:20,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:31:20,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:31:20,838 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 24 states. [2020-12-22 04:31:21,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:21,026 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2020-12-22 04:31:21,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:31:21,026 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2020-12-22 04:31:21,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:21,027 INFO L225 Difference]: With dead ends: 115 [2020-12-22 04:31:21,027 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 04:31:21,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=359, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:31:21,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 04:31:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2020-12-22 04:31:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 04:31:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2020-12-22 04:31:21,031 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 47 [2020-12-22 04:31:21,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:21,031 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2020-12-22 04:31:21,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:31:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2020-12-22 04:31:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:31:21,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:21,032 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:21,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:21,233 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2119646806, now seen corresponding path program 19 times [2020-12-22 04:31:21,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:21,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076768116] [2020-12-22 04:31:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:21,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076768116] [2020-12-22 04:31:21,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281163513] [2020-12-22 04:31:21,619 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 04:31:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:21,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:31:21,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:21,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:21,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-12-22 04:31:21,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384070082] [2020-12-22 04:31:21,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:31:21,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:21,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:31:21,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:31:21,787 INFO L87 Difference]: Start difference. First operand 104 states and 123 transitions. Second operand 25 states. [2020-12-22 04:31:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:21,986 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2020-12-22 04:31:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:31:21,986 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2020-12-22 04:31:21,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:21,987 INFO L225 Difference]: With dead ends: 120 [2020-12-22 04:31:21,988 INFO L226 Difference]: Without dead ends: 116 [2020-12-22 04:31:21,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=387, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:31:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-22 04:31:21,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2020-12-22 04:31:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 04:31:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 129 transitions. [2020-12-22 04:31:21,992 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 129 transitions. Word has length 49 [2020-12-22 04:31:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:21,992 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 129 transitions. [2020-12-22 04:31:21,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:31:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 129 transitions. [2020-12-22 04:31:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 04:31:21,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:21,993 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:22,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:22,206 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:22,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:22,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1210944113, now seen corresponding path program 20 times [2020-12-22 04:31:22,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:22,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148430061] [2020-12-22 04:31:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:22,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148430061] [2020-12-22 04:31:22,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29825007] [2020-12-22 04:31:22,589 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 04:31:22,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:31:22,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:22,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:31:22,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:22,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:22,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-12-22 04:31:22,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490127415] [2020-12-22 04:31:22,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:31:22,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:22,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:31:22,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:31:22,754 INFO L87 Difference]: Start difference. First operand 109 states and 129 transitions. Second operand 26 states. [2020-12-22 04:31:22,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:22,988 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2020-12-22 04:31:22,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:31:22,989 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2020-12-22 04:31:22,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:22,991 INFO L225 Difference]: With dead ends: 125 [2020-12-22 04:31:22,991 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 04:31:22,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=416, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:31:22,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 04:31:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2020-12-22 04:31:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 04:31:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 135 transitions. [2020-12-22 04:31:22,995 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 135 transitions. Word has length 51 [2020-12-22 04:31:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:22,995 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 135 transitions. [2020-12-22 04:31:22,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:31:22,996 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 135 transitions. [2020-12-22 04:31:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 04:31:22,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:22,996 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:23,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:31:23,211 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:23,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:23,211 INFO L82 PathProgramCache]: Analyzing trace with hash -173982772, now seen corresponding path program 21 times [2020-12-22 04:31:23,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:23,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526297950] [2020-12-22 04:31:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:23,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526297950] [2020-12-22 04:31:23,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449577129] [2020-12-22 04:31:23,587 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 04:31:23,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:31:23,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:23,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:31:23,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:23,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:23,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-12-22 04:31:23,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540936073] [2020-12-22 04:31:23,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:31:23,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:23,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:31:23,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:31:23,797 INFO L87 Difference]: Start difference. First operand 114 states and 135 transitions. Second operand 27 states. [2020-12-22 04:31:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:24,030 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2020-12-22 04:31:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:31:24,031 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2020-12-22 04:31:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:24,032 INFO L225 Difference]: With dead ends: 130 [2020-12-22 04:31:24,032 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 04:31:24,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=310, Invalid=446, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:31:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 04:31:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2020-12-22 04:31:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-22 04:31:24,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2020-12-22 04:31:24,037 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 53 [2020-12-22 04:31:24,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:24,037 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2020-12-22 04:31:24,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:31:24,037 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2020-12-22 04:31:24,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 04:31:24,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:24,038 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:24,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:31:24,249 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:24,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:24,249 INFO L82 PathProgramCache]: Analyzing trace with hash 351142503, now seen corresponding path program 22 times [2020-12-22 04:31:24,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:24,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73513171] [2020-12-22 04:31:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:24,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73513171] [2020-12-22 04:31:24,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746911283] [2020-12-22 04:31:24,663 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 04:31:24,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:31:24,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:24,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:31:24,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:24,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:24,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-12-22 04:31:24,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419321539] [2020-12-22 04:31:24,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:31:24,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:24,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:31:24,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:31:24,869 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand 28 states. [2020-12-22 04:31:25,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:25,101 INFO L93 Difference]: Finished difference Result 135 states and 159 transitions. [2020-12-22 04:31:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:31:25,101 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2020-12-22 04:31:25,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:25,103 INFO L225 Difference]: With dead ends: 135 [2020-12-22 04:31:25,103 INFO L226 Difference]: Without dead ends: 131 [2020-12-22 04:31:25,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=477, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:31:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-22 04:31:25,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2020-12-22 04:31:25,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-22 04:31:25,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2020-12-22 04:31:25,106 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 55 [2020-12-22 04:31:25,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:25,107 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2020-12-22 04:31:25,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:31:25,107 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2020-12-22 04:31:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 04:31:25,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:25,107 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:25,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:25,315 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:25,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1809609150, now seen corresponding path program 23 times [2020-12-22 04:31:25,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:25,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367701442] [2020-12-22 04:31:25,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:25,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367701442] [2020-12-22 04:31:25,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74540000] [2020-12-22 04:31:25,744 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 04:31:25,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 04:31:25,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:25,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:31:25,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:25,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:25,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-12-22 04:31:25,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578968840] [2020-12-22 04:31:25,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:31:25,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:25,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:31:25,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:31:25,949 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand 29 states. [2020-12-22 04:31:26,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:26,210 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2020-12-22 04:31:26,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:31:26,211 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2020-12-22 04:31:26,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:26,212 INFO L225 Difference]: With dead ends: 140 [2020-12-22 04:31:26,212 INFO L226 Difference]: Without dead ends: 136 [2020-12-22 04:31:26,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=361, Invalid=509, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:31:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-22 04:31:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2020-12-22 04:31:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-22 04:31:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2020-12-22 04:31:26,216 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 57 [2020-12-22 04:31:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:26,216 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2020-12-22 04:31:26,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:31:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2020-12-22 04:31:26,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 04:31:26,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:26,217 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:26,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:31:26,430 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash 472223581, now seen corresponding path program 24 times [2020-12-22 04:31:26,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:26,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576244416] [2020-12-22 04:31:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:26,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576244416] [2020-12-22 04:31:26,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456459801] [2020-12-22 04:31:26,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:26,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:31:26,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:26,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:31:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:27,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:27,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-12-22 04:31:27,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991733922] [2020-12-22 04:31:27,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:31:27,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:27,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:31:27,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:31:27,062 INFO L87 Difference]: Start difference. First operand 129 states and 153 transitions. Second operand 30 states. [2020-12-22 04:31:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:27,277 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2020-12-22 04:31:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:31:27,278 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2020-12-22 04:31:27,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:27,279 INFO L225 Difference]: With dead ends: 145 [2020-12-22 04:31:27,279 INFO L226 Difference]: Without dead ends: 141 [2020-12-22 04:31:27,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=388, Invalid=542, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:31:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-22 04:31:27,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2020-12-22 04:31:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 04:31:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 159 transitions. [2020-12-22 04:31:27,283 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 159 transitions. Word has length 59 [2020-12-22 04:31:27,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:27,283 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 159 transitions. [2020-12-22 04:31:27,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:31:27,284 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 159 transitions. [2020-12-22 04:31:27,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 04:31:27,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:27,284 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:27,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:27,496 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:27,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:27,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1414810184, now seen corresponding path program 25 times [2020-12-22 04:31:27,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:27,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518480754] [2020-12-22 04:31:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:28,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518480754] [2020-12-22 04:31:28,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314914928] [2020-12-22 04:31:28,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:28,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:31:28,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:28,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:28,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-12-22 04:31:28,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961259631] [2020-12-22 04:31:28,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:31:28,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:28,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:31:28,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:31:28,243 INFO L87 Difference]: Start difference. First operand 134 states and 159 transitions. Second operand 31 states. [2020-12-22 04:31:28,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:28,521 INFO L93 Difference]: Finished difference Result 150 states and 177 transitions. [2020-12-22 04:31:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:31:28,522 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2020-12-22 04:31:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:28,523 INFO L225 Difference]: With dead ends: 150 [2020-12-22 04:31:28,523 INFO L226 Difference]: Without dead ends: 146 [2020-12-22 04:31:28,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=416, Invalid=576, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:31:28,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-22 04:31:28,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2020-12-22 04:31:28,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 04:31:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 165 transitions. [2020-12-22 04:31:28,528 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 165 transitions. Word has length 61 [2020-12-22 04:31:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:28,528 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 165 transitions. [2020-12-22 04:31:28,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:31:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 165 transitions. [2020-12-22 04:31:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 04:31:28,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:28,529 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:28,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:31:28,745 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1916907859, now seen corresponding path program 26 times [2020-12-22 04:31:28,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:28,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012607407] [2020-12-22 04:31:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:29,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012607407] [2020-12-22 04:31:29,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361595588] [2020-12-22 04:31:29,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:29,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:31:29,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:29,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:31:29,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:29,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:29,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2020-12-22 04:31:29,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090584216] [2020-12-22 04:31:29,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:31:29,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:29,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:31:29,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:31:29,433 INFO L87 Difference]: Start difference. First operand 139 states and 165 transitions. Second operand 32 states. [2020-12-22 04:31:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:29,731 INFO L93 Difference]: Finished difference Result 155 states and 183 transitions. [2020-12-22 04:31:29,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:31:29,731 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2020-12-22 04:31:29,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:29,732 INFO L225 Difference]: With dead ends: 155 [2020-12-22 04:31:29,732 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 04:31:29,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=445, Invalid=611, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:31:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 04:31:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 144. [2020-12-22 04:31:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 04:31:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 171 transitions. [2020-12-22 04:31:29,742 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 171 transitions. Word has length 63 [2020-12-22 04:31:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:29,742 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 171 transitions. [2020-12-22 04:31:29,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:31:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 171 transitions. [2020-12-22 04:31:29,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 04:31:29,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:29,743 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:29,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:31:29,949 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:29,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:29,949 INFO L82 PathProgramCache]: Analyzing trace with hash -347655634, now seen corresponding path program 27 times [2020-12-22 04:31:29,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:29,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458841417] [2020-12-22 04:31:29,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:30,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458841417] [2020-12-22 04:31:30,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706105074] [2020-12-22 04:31:30,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:30,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 04:31:30,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:30,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:31:30,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:30,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:30,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2020-12-22 04:31:30,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989755106] [2020-12-22 04:31:30,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:31:30,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:30,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:31:30,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:31:30,720 INFO L87 Difference]: Start difference. First operand 144 states and 171 transitions. Second operand 33 states. [2020-12-22 04:31:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:31,001 INFO L93 Difference]: Finished difference Result 160 states and 189 transitions. [2020-12-22 04:31:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:31:31,001 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2020-12-22 04:31:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:31,003 INFO L225 Difference]: With dead ends: 160 [2020-12-22 04:31:31,003 INFO L226 Difference]: Without dead ends: 156 [2020-12-22 04:31:31,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=475, Invalid=647, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:31:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-22 04:31:31,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 149. [2020-12-22 04:31:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-22 04:31:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 177 transitions. [2020-12-22 04:31:31,008 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 177 transitions. Word has length 65 [2020-12-22 04:31:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:31,008 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 177 transitions. [2020-12-22 04:31:31,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:31:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 177 transitions. [2020-12-22 04:31:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 04:31:31,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:31,009 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:31,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:31:31,222 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:31,223 INFO L82 PathProgramCache]: Analyzing trace with hash 955246665, now seen corresponding path program 28 times [2020-12-22 04:31:31,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:31,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415742909] [2020-12-22 04:31:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:31,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415742909] [2020-12-22 04:31:31,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954635227] [2020-12-22 04:31:31,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:31,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:31:31,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:31,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:31:31,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:32,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:32,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2020-12-22 04:31:32,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695931969] [2020-12-22 04:31:32,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:31:32,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:32,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:31:32,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:31:32,069 INFO L87 Difference]: Start difference. First operand 149 states and 177 transitions. Second operand 34 states. [2020-12-22 04:31:32,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:32,342 INFO L93 Difference]: Finished difference Result 165 states and 195 transitions. [2020-12-22 04:31:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:31:32,343 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2020-12-22 04:31:32,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:32,345 INFO L225 Difference]: With dead ends: 165 [2020-12-22 04:31:32,345 INFO L226 Difference]: Without dead ends: 161 [2020-12-22 04:31:32,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=506, Invalid=684, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:31:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-22 04:31:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2020-12-22 04:31:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-22 04:31:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2020-12-22 04:31:32,350 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 67 [2020-12-22 04:31:32,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:32,351 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2020-12-22 04:31:32,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:31:32,351 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2020-12-22 04:31:32,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 04:31:32,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:32,352 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:32,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:32,566 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:32,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:32,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1086094428, now seen corresponding path program 29 times [2020-12-22 04:31:32,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:32,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20600140] [2020-12-22 04:31:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:33,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20600140] [2020-12-22 04:31:33,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208846917] [2020-12-22 04:31:33,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:33,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 04:31:33,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:33,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:31:33,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:33,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:33,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2020-12-22 04:31:33,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527866834] [2020-12-22 04:31:33,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:31:33,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:33,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:31:33,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:31:33,380 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand 35 states. [2020-12-22 04:31:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:33,715 INFO L93 Difference]: Finished difference Result 170 states and 201 transitions. [2020-12-22 04:31:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:31:33,716 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2020-12-22 04:31:33,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:33,718 INFO L225 Difference]: With dead ends: 170 [2020-12-22 04:31:33,718 INFO L226 Difference]: Without dead ends: 166 [2020-12-22 04:31:33,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=538, Invalid=722, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:31:33,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-22 04:31:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2020-12-22 04:31:33,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 04:31:33,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 189 transitions. [2020-12-22 04:31:33,725 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 189 transitions. Word has length 69 [2020-12-22 04:31:33,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:33,725 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 189 transitions. [2020-12-22 04:31:33,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:31:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 189 transitions. [2020-12-22 04:31:33,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 04:31:33,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:33,726 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:33,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 04:31:33,940 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:33,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:33,940 INFO L82 PathProgramCache]: Analyzing trace with hash -14830529, now seen corresponding path program 30 times [2020-12-22 04:31:33,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:33,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027409688] [2020-12-22 04:31:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:34,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027409688] [2020-12-22 04:31:34,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713170917] [2020-12-22 04:31:34,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:34,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:31:34,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:31:34,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:34,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:34,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2020-12-22 04:31:34,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492159339] [2020-12-22 04:31:34,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:31:34,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:34,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:31:34,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:31:34,796 INFO L87 Difference]: Start difference. First operand 159 states and 189 transitions. Second operand 36 states. [2020-12-22 04:31:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:35,128 INFO L93 Difference]: Finished difference Result 175 states and 207 transitions. [2020-12-22 04:31:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:31:35,129 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2020-12-22 04:31:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:35,130 INFO L225 Difference]: With dead ends: 175 [2020-12-22 04:31:35,130 INFO L226 Difference]: Without dead ends: 171 [2020-12-22 04:31:35,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=571, Invalid=761, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:31:35,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-22 04:31:35,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 164. [2020-12-22 04:31:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-22 04:31:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 195 transitions. [2020-12-22 04:31:35,135 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 195 transitions. Word has length 71 [2020-12-22 04:31:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:35,135 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 195 transitions. [2020-12-22 04:31:35,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:31:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 195 transitions. [2020-12-22 04:31:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 04:31:35,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:35,136 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:35,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:35,350 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:35,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:35,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1322374630, now seen corresponding path program 31 times [2020-12-22 04:31:35,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:35,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808170662] [2020-12-22 04:31:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:36,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808170662] [2020-12-22 04:31:36,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118653378] [2020-12-22 04:31:36,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:36,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:31:36,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:36,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:36,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2020-12-22 04:31:36,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95848824] [2020-12-22 04:31:36,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:31:36,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:36,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:31:36,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:31:36,325 INFO L87 Difference]: Start difference. First operand 164 states and 195 transitions. Second operand 37 states. [2020-12-22 04:31:36,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:36,660 INFO L93 Difference]: Finished difference Result 180 states and 213 transitions. [2020-12-22 04:31:36,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:31:36,661 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2020-12-22 04:31:36,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:36,662 INFO L225 Difference]: With dead ends: 180 [2020-12-22 04:31:36,662 INFO L226 Difference]: Without dead ends: 176 [2020-12-22 04:31:36,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=801, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:31:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-22 04:31:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2020-12-22 04:31:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-22 04:31:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 201 transitions. [2020-12-22 04:31:36,668 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 201 transitions. Word has length 73 [2020-12-22 04:31:36,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:36,668 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 201 transitions. [2020-12-22 04:31:36,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:31:36,668 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 201 transitions. [2020-12-22 04:31:36,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 04:31:36,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:36,669 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:36,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:31:36,872 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash 553162037, now seen corresponding path program 32 times [2020-12-22 04:31:36,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:36,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971164671] [2020-12-22 04:31:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:37,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971164671] [2020-12-22 04:31:37,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507833433] [2020-12-22 04:31:37,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:37,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:31:37,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:37,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:31:37,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:37,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:37,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 38 [2020-12-22 04:31:37,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092838607] [2020-12-22 04:31:37,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:31:37,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:37,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:31:37,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:31:37,916 INFO L87 Difference]: Start difference. First operand 169 states and 201 transitions. Second operand 38 states. [2020-12-22 04:31:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:38,256 INFO L93 Difference]: Finished difference Result 185 states and 219 transitions. [2020-12-22 04:31:38,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:31:38,257 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2020-12-22 04:31:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:38,258 INFO L225 Difference]: With dead ends: 185 [2020-12-22 04:31:38,258 INFO L226 Difference]: Without dead ends: 181 [2020-12-22 04:31:38,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=640, Invalid=842, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:31:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-22 04:31:38,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2020-12-22 04:31:38,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-22 04:31:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 207 transitions. [2020-12-22 04:31:38,265 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 207 transitions. Word has length 75 [2020-12-22 04:31:38,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:38,266 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 207 transitions. [2020-12-22 04:31:38,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:31:38,266 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 207 transitions. [2020-12-22 04:31:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 04:31:38,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:38,267 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:38,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 04:31:38,480 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:38,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:38,482 INFO L82 PathProgramCache]: Analyzing trace with hash -942365296, now seen corresponding path program 33 times [2020-12-22 04:31:38,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:38,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504262923] [2020-12-22 04:31:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:39,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504262923] [2020-12-22 04:31:39,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159095833] [2020-12-22 04:31:39,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:39,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 04:31:39,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:39,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:31:39,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:39,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:39,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2020-12-22 04:31:39,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163643117] [2020-12-22 04:31:39,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:31:39,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:39,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:31:39,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:31:39,539 INFO L87 Difference]: Start difference. First operand 174 states and 207 transitions. Second operand 39 states. [2020-12-22 04:31:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:39,870 INFO L93 Difference]: Finished difference Result 190 states and 225 transitions. [2020-12-22 04:31:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:31:39,871 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2020-12-22 04:31:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:39,872 INFO L225 Difference]: With dead ends: 190 [2020-12-22 04:31:39,872 INFO L226 Difference]: Without dead ends: 186 [2020-12-22 04:31:39,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=676, Invalid=884, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:31:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-22 04:31:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 179. [2020-12-22 04:31:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-22 04:31:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 213 transitions. [2020-12-22 04:31:39,878 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 213 transitions. Word has length 77 [2020-12-22 04:31:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:39,878 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 213 transitions. [2020-12-22 04:31:39,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:31:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 213 transitions. [2020-12-22 04:31:39,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 04:31:39,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:39,880 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:40,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:31:40,092 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:40,093 INFO L82 PathProgramCache]: Analyzing trace with hash 669911851, now seen corresponding path program 34 times [2020-12-22 04:31:40,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:40,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390016585] [2020-12-22 04:31:40,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:40,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390016585] [2020-12-22 04:31:40,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550628183] [2020-12-22 04:31:40,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:40,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:31:40,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:40,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:31:40,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:41,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:41,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2020-12-22 04:31:41,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724004472] [2020-12-22 04:31:41,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:31:41,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:41,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:31:41,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:31:41,083 INFO L87 Difference]: Start difference. First operand 179 states and 213 transitions. Second operand 40 states. [2020-12-22 04:31:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:41,467 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2020-12-22 04:31:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:31:41,467 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2020-12-22 04:31:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:41,469 INFO L225 Difference]: With dead ends: 195 [2020-12-22 04:31:41,469 INFO L226 Difference]: Without dead ends: 191 [2020-12-22 04:31:41,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=713, Invalid=927, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:31:41,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-22 04:31:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2020-12-22 04:31:41,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-22 04:31:41,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 219 transitions. [2020-12-22 04:31:41,474 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 219 transitions. Word has length 79 [2020-12-22 04:31:41,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:41,474 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 219 transitions. [2020-12-22 04:31:41,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:31:41,474 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 219 transitions. [2020-12-22 04:31:41,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 04:31:41,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:41,475 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:41,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:31:41,689 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:41,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:41,690 INFO L82 PathProgramCache]: Analyzing trace with hash -414943738, now seen corresponding path program 35 times [2020-12-22 04:31:41,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:41,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119359171] [2020-12-22 04:31:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:42,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119359171] [2020-12-22 04:31:42,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541346809] [2020-12-22 04:31:42,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:42,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 04:31:42,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:42,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:31:42,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:42,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:42,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2020-12-22 04:31:42,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946754921] [2020-12-22 04:31:42,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:31:42,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:42,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:31:42,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:31:42,785 INFO L87 Difference]: Start difference. First operand 184 states and 219 transitions. Second operand 41 states. [2020-12-22 04:31:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:43,154 INFO L93 Difference]: Finished difference Result 200 states and 237 transitions. [2020-12-22 04:31:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:31:43,155 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2020-12-22 04:31:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:43,156 INFO L225 Difference]: With dead ends: 200 [2020-12-22 04:31:43,156 INFO L226 Difference]: Without dead ends: 196 [2020-12-22 04:31:43,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=751, Invalid=971, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:31:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-22 04:31:43,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 189. [2020-12-22 04:31:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 04:31:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 225 transitions. [2020-12-22 04:31:43,161 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 225 transitions. Word has length 81 [2020-12-22 04:31:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:43,162 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 225 transitions. [2020-12-22 04:31:43,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:31:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 225 transitions. [2020-12-22 04:31:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 04:31:43,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:43,164 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:43,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:31:43,378 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:43,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:43,379 INFO L82 PathProgramCache]: Analyzing trace with hash 715888161, now seen corresponding path program 36 times [2020-12-22 04:31:43,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:43,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698738616] [2020-12-22 04:31:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:44,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698738616] [2020-12-22 04:31:44,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991661369] [2020-12-22 04:31:44,326 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:44,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 04:31:44,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:44,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:31:44,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:44,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:44,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 42 [2020-12-22 04:31:44,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921676392] [2020-12-22 04:31:44,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:31:44,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:44,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:31:44,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:31:44,599 INFO L87 Difference]: Start difference. First operand 189 states and 225 transitions. Second operand 42 states. [2020-12-22 04:31:45,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:45,019 INFO L93 Difference]: Finished difference Result 205 states and 243 transitions. [2020-12-22 04:31:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:31:45,020 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2020-12-22 04:31:45,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:45,022 INFO L225 Difference]: With dead ends: 205 [2020-12-22 04:31:45,022 INFO L226 Difference]: Without dead ends: 201 [2020-12-22 04:31:45,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=790, Invalid=1016, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:31:45,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-22 04:31:45,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 194. [2020-12-22 04:31:45,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 04:31:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 231 transitions. [2020-12-22 04:31:45,028 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 231 transitions. Word has length 83 [2020-12-22 04:31:45,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:45,028 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 231 transitions. [2020-12-22 04:31:45,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:31:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 231 transitions. [2020-12-22 04:31:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 04:31:45,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:45,029 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:45,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:31:45,243 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:45,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:45,244 INFO L82 PathProgramCache]: Analyzing trace with hash 818617212, now seen corresponding path program 37 times [2020-12-22 04:31:45,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:45,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533562362] [2020-12-22 04:31:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:46,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533562362] [2020-12-22 04:31:46,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424569744] [2020-12-22 04:31:46,281 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:46,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:31:46,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:46,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:46,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2020-12-22 04:31:46,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731222192] [2020-12-22 04:31:46,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:31:46,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:31:46,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:31:46,528 INFO L87 Difference]: Start difference. First operand 194 states and 231 transitions. Second operand 43 states. [2020-12-22 04:31:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:46,982 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2020-12-22 04:31:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:31:46,983 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2020-12-22 04:31:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:46,985 INFO L225 Difference]: With dead ends: 210 [2020-12-22 04:31:46,985 INFO L226 Difference]: Without dead ends: 206 [2020-12-22 04:31:46,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=830, Invalid=1062, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:31:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-22 04:31:46,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 199. [2020-12-22 04:31:46,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 04:31:46,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 237 transitions. [2020-12-22 04:31:46,990 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 237 transitions. Word has length 85 [2020-12-22 04:31:46,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:46,990 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 237 transitions. [2020-12-22 04:31:46,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:31:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 237 transitions. [2020-12-22 04:31:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 04:31:46,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:46,992 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:47,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:31:47,205 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:47,205 INFO L82 PathProgramCache]: Analyzing trace with hash 756987415, now seen corresponding path program 38 times [2020-12-22 04:31:47,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:47,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864032711] [2020-12-22 04:31:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:48,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864032711] [2020-12-22 04:31:48,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437547670] [2020-12-22 04:31:48,233 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:48,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:31:48,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:48,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:31:48,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:48,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:48,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 44 [2020-12-22 04:31:48,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130054465] [2020-12-22 04:31:48,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:31:48,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:48,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:31:48,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:31:48,466 INFO L87 Difference]: Start difference. First operand 199 states and 237 transitions. Second operand 44 states. [2020-12-22 04:31:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:48,924 INFO L93 Difference]: Finished difference Result 215 states and 255 transitions. [2020-12-22 04:31:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:31:48,924 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2020-12-22 04:31:48,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:48,926 INFO L225 Difference]: With dead ends: 215 [2020-12-22 04:31:48,926 INFO L226 Difference]: Without dead ends: 211 [2020-12-22 04:31:48,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=871, Invalid=1109, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:31:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-22 04:31:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 204. [2020-12-22 04:31:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-22 04:31:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 243 transitions. [2020-12-22 04:31:48,932 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 243 transitions. Word has length 87 [2020-12-22 04:31:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:48,932 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 243 transitions. [2020-12-22 04:31:48,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:31:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 243 transitions. [2020-12-22 04:31:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 04:31:48,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:48,934 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:49,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:31:49,148 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:49,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1660294642, now seen corresponding path program 39 times [2020-12-22 04:31:49,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:49,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800224373] [2020-12-22 04:31:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:50,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800224373] [2020-12-22 04:31:50,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981029872] [2020-12-22 04:31:50,270 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:50,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-22 04:31:50,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:50,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 04:31:50,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:50,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:50,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 45 [2020-12-22 04:31:50,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122529008] [2020-12-22 04:31:50,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:31:50,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:50,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:31:50,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:31:50,556 INFO L87 Difference]: Start difference. First operand 204 states and 243 transitions. Second operand 45 states. [2020-12-22 04:31:51,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:51,035 INFO L93 Difference]: Finished difference Result 220 states and 261 transitions. [2020-12-22 04:31:51,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:31:51,035 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2020-12-22 04:31:51,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:51,037 INFO L225 Difference]: With dead ends: 220 [2020-12-22 04:31:51,037 INFO L226 Difference]: Without dead ends: 216 [2020-12-22 04:31:51,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=913, Invalid=1157, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:31:51,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-22 04:31:51,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 209. [2020-12-22 04:31:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-22 04:31:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 249 transitions. [2020-12-22 04:31:51,042 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 249 transitions. Word has length 89 [2020-12-22 04:31:51,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:51,042 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 249 transitions. [2020-12-22 04:31:51,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:31:51,042 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 249 transitions. [2020-12-22 04:31:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 04:31:51,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:51,044 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:51,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:51,255 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:51,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2139821299, now seen corresponding path program 40 times [2020-12-22 04:31:51,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:51,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534172475] [2020-12-22 04:31:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:52,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534172475] [2020-12-22 04:31:52,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197784489] [2020-12-22 04:31:52,385 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:52,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:31:52,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:52,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 04:31:52,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:52,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:52,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 46 [2020-12-22 04:31:52,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703452478] [2020-12-22 04:31:52,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:31:52,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:52,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:31:52,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:31:52,645 INFO L87 Difference]: Start difference. First operand 209 states and 249 transitions. Second operand 46 states. [2020-12-22 04:31:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:53,100 INFO L93 Difference]: Finished difference Result 225 states and 267 transitions. [2020-12-22 04:31:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:31:53,101 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2020-12-22 04:31:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:53,102 INFO L225 Difference]: With dead ends: 225 [2020-12-22 04:31:53,102 INFO L226 Difference]: Without dead ends: 221 [2020-12-22 04:31:53,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=956, Invalid=1206, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:31:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-22 04:31:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2020-12-22 04:31:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-22 04:31:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 255 transitions. [2020-12-22 04:31:53,107 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 255 transitions. Word has length 91 [2020-12-22 04:31:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:53,107 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 255 transitions. [2020-12-22 04:31:53,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:31:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 255 transitions. [2020-12-22 04:31:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 04:31:53,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:53,109 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:53,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:53,324 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:53,324 INFO L82 PathProgramCache]: Analyzing trace with hash 965928296, now seen corresponding path program 41 times [2020-12-22 04:31:53,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:53,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441467365] [2020-12-22 04:31:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:54,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441467365] [2020-12-22 04:31:54,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026932165] [2020-12-22 04:31:54,489 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:54,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-22 04:31:54,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:54,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 04:31:54,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:54,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:54,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 47 [2020-12-22 04:31:54,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496393437] [2020-12-22 04:31:54,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:31:54,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:54,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:31:54,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:31:54,776 INFO L87 Difference]: Start difference. First operand 214 states and 255 transitions. Second operand 47 states. [2020-12-22 04:31:55,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:55,219 INFO L93 Difference]: Finished difference Result 230 states and 273 transitions. [2020-12-22 04:31:55,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:31:55,220 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2020-12-22 04:31:55,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:55,221 INFO L225 Difference]: With dead ends: 230 [2020-12-22 04:31:55,221 INFO L226 Difference]: Without dead ends: 226 [2020-12-22 04:31:55,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1000, Invalid=1256, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:31:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-22 04:31:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 219. [2020-12-22 04:31:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-22 04:31:55,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 261 transitions. [2020-12-22 04:31:55,227 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 261 transitions. Word has length 93 [2020-12-22 04:31:55,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:55,227 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 261 transitions. [2020-12-22 04:31:55,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:31:55,227 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 261 transitions. [2020-12-22 04:31:55,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 04:31:55,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:55,228 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:55,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 04:31:55,441 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:55,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:55,442 INFO L82 PathProgramCache]: Analyzing trace with hash 589018371, now seen corresponding path program 42 times [2020-12-22 04:31:55,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:55,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699014764] [2020-12-22 04:31:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:56,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699014764] [2020-12-22 04:31:56,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760459816] [2020-12-22 04:31:56,703 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:56,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-22 04:31:56,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:56,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:31:56,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:56,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:56,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 48 [2020-12-22 04:31:56,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719150952] [2020-12-22 04:31:56,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:31:56,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:56,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:31:56,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:31:56,994 INFO L87 Difference]: Start difference. First operand 219 states and 261 transitions. Second operand 48 states. [2020-12-22 04:31:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:57,454 INFO L93 Difference]: Finished difference Result 235 states and 279 transitions. [2020-12-22 04:31:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:31:57,455 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2020-12-22 04:31:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:57,457 INFO L225 Difference]: With dead ends: 235 [2020-12-22 04:31:57,457 INFO L226 Difference]: Without dead ends: 231 [2020-12-22 04:31:57,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1045, Invalid=1307, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:31:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-22 04:31:57,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 224. [2020-12-22 04:31:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-22 04:31:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 267 transitions. [2020-12-22 04:31:57,462 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 267 transitions. Word has length 95 [2020-12-22 04:31:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:57,463 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 267 transitions. [2020-12-22 04:31:57,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:31:57,463 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 267 transitions. [2020-12-22 04:31:57,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 04:31:57,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:57,464 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:57,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:57,677 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:57,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:57,678 INFO L82 PathProgramCache]: Analyzing trace with hash -844166690, now seen corresponding path program 43 times [2020-12-22 04:31:57,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:57,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054635943] [2020-12-22 04:31:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:58,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054635943] [2020-12-22 04:31:58,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938237207] [2020-12-22 04:31:58,900 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:58,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:31:59,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:59,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:59,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 49 [2020-12-22 04:31:59,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919987344] [2020-12-22 04:31:59,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:31:59,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:59,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:31:59,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:31:59,179 INFO L87 Difference]: Start difference. First operand 224 states and 267 transitions. Second operand 49 states. [2020-12-22 04:31:59,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:59,717 INFO L93 Difference]: Finished difference Result 240 states and 285 transitions. [2020-12-22 04:31:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:31:59,718 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2020-12-22 04:31:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:59,719 INFO L225 Difference]: With dead ends: 240 [2020-12-22 04:31:59,720 INFO L226 Difference]: Without dead ends: 236 [2020-12-22 04:31:59,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1091, Invalid=1359, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:31:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-22 04:31:59,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 229. [2020-12-22 04:31:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-22 04:31:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 273 transitions. [2020-12-22 04:31:59,724 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 273 transitions. Word has length 97 [2020-12-22 04:31:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:59,724 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 273 transitions. [2020-12-22 04:31:59,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:31:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 273 transitions. [2020-12-22 04:31:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 04:31:59,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:59,726 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:59,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:59,941 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash 549491705, now seen corresponding path program 44 times [2020-12-22 04:31:59,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:59,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376706925] [2020-12-22 04:31:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:01,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376706925] [2020-12-22 04:32:01,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490489398] [2020-12-22 04:32:01,368 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:01,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:32:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:01,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 04:32:01,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:01,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:01,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 50 [2020-12-22 04:32:01,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964353572] [2020-12-22 04:32:01,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:32:01,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:01,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:32:01,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:32:01,650 INFO L87 Difference]: Start difference. First operand 229 states and 273 transitions. Second operand 50 states. [2020-12-22 04:32:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:02,203 INFO L93 Difference]: Finished difference Result 245 states and 291 transitions. [2020-12-22 04:32:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:32:02,203 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2020-12-22 04:32:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:02,206 INFO L225 Difference]: With dead ends: 245 [2020-12-22 04:32:02,206 INFO L226 Difference]: Without dead ends: 241 [2020-12-22 04:32:02,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1138, Invalid=1412, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:32:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-22 04:32:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 234. [2020-12-22 04:32:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-22 04:32:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 279 transitions. [2020-12-22 04:32:02,210 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 279 transitions. Word has length 99 [2020-12-22 04:32:02,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:02,211 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 279 transitions. [2020-12-22 04:32:02,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:32:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 279 transitions. [2020-12-22 04:32:02,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 04:32:02,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:02,212 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:02,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 04:32:02,425 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:02,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:02,425 INFO L82 PathProgramCache]: Analyzing trace with hash -174587052, now seen corresponding path program 45 times [2020-12-22 04:32:02,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:02,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504232156] [2020-12-22 04:32:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:03,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504232156] [2020-12-22 04:32:03,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078974302] [2020-12-22 04:32:03,981 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:04,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-22 04:32:04,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:04,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:32:04,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:04,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:04,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 51 [2020-12-22 04:32:04,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756468735] [2020-12-22 04:32:04,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 04:32:04,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:04,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 04:32:04,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:32:04,330 INFO L87 Difference]: Start difference. First operand 234 states and 279 transitions. Second operand 51 states. [2020-12-22 04:32:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:04,838 INFO L93 Difference]: Finished difference Result 250 states and 297 transitions. [2020-12-22 04:32:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 04:32:04,839 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2020-12-22 04:32:04,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:04,840 INFO L225 Difference]: With dead ends: 250 [2020-12-22 04:32:04,841 INFO L226 Difference]: Without dead ends: 246 [2020-12-22 04:32:04,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1186, Invalid=1466, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:32:04,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-22 04:32:04,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 239. [2020-12-22 04:32:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-12-22 04:32:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 285 transitions. [2020-12-22 04:32:04,847 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 285 transitions. Word has length 101 [2020-12-22 04:32:04,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:04,847 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 285 transitions. [2020-12-22 04:32:04,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 04:32:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 285 transitions. [2020-12-22 04:32:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 04:32:04,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:04,849 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:05,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 04:32:05,063 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:05,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:05,063 INFO L82 PathProgramCache]: Analyzing trace with hash -229570577, now seen corresponding path program 46 times [2020-12-22 04:32:05,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:05,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401124051] [2020-12-22 04:32:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:06,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401124051] [2020-12-22 04:32:06,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405216890] [2020-12-22 04:32:06,508 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:06,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:32:06,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:06,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:32:06,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:06,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:06,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 52 [2020-12-22 04:32:06,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566789541] [2020-12-22 04:32:06,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 04:32:06,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:06,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 04:32:06,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:32:06,794 INFO L87 Difference]: Start difference. First operand 239 states and 285 transitions. Second operand 52 states. [2020-12-22 04:32:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:07,351 INFO L93 Difference]: Finished difference Result 255 states and 303 transitions. [2020-12-22 04:32:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 04:32:07,351 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2020-12-22 04:32:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:07,353 INFO L225 Difference]: With dead ends: 255 [2020-12-22 04:32:07,353 INFO L226 Difference]: Without dead ends: 251 [2020-12-22 04:32:07,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1235, Invalid=1521, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:32:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-22 04:32:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 244. [2020-12-22 04:32:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-12-22 04:32:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 291 transitions. [2020-12-22 04:32:07,359 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 291 transitions. Word has length 103 [2020-12-22 04:32:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:07,359 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 291 transitions. [2020-12-22 04:32:07,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 04:32:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 291 transitions. [2020-12-22 04:32:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 04:32:07,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:07,360 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:07,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 04:32:07,575 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1529130550, now seen corresponding path program 47 times [2020-12-22 04:32:07,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:07,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911686257] [2020-12-22 04:32:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:09,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911686257] [2020-12-22 04:32:09,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475639646] [2020-12-22 04:32:09,268 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:09,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-22 04:32:09,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:09,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:32:09,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:09,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:09,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 53 [2020-12-22 04:32:09,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973149727] [2020-12-22 04:32:09,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 04:32:09,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:09,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 04:32:09,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:32:09,601 INFO L87 Difference]: Start difference. First operand 244 states and 291 transitions. Second operand 53 states. [2020-12-22 04:32:10,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:10,193 INFO L93 Difference]: Finished difference Result 260 states and 309 transitions. [2020-12-22 04:32:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 04:32:10,195 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2020-12-22 04:32:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:10,197 INFO L225 Difference]: With dead ends: 260 [2020-12-22 04:32:10,197 INFO L226 Difference]: Without dead ends: 256 [2020-12-22 04:32:10,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1285, Invalid=1577, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:32:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-22 04:32:10,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 249. [2020-12-22 04:32:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-22 04:32:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 297 transitions. [2020-12-22 04:32:10,202 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 297 transitions. Word has length 105 [2020-12-22 04:32:10,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:10,203 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 297 transitions. [2020-12-22 04:32:10,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 04:32:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 297 transitions. [2020-12-22 04:32:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 04:32:10,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:10,204 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:10,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:10,418 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:10,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:10,418 INFO L82 PathProgramCache]: Analyzing trace with hash -570781467, now seen corresponding path program 48 times [2020-12-22 04:32:10,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:10,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922630356] [2020-12-22 04:32:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:12,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922630356] [2020-12-22 04:32:12,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011070449] [2020-12-22 04:32:12,091 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:12,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-22 04:32:12,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:12,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 04:32:12,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:12,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:12,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 54 [2020-12-22 04:32:12,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865704805] [2020-12-22 04:32:12,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 04:32:12,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:12,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 04:32:12,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:32:12,465 INFO L87 Difference]: Start difference. First operand 249 states and 297 transitions. Second operand 54 states. [2020-12-22 04:32:13,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:13,092 INFO L93 Difference]: Finished difference Result 265 states and 315 transitions. [2020-12-22 04:32:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 04:32:13,093 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2020-12-22 04:32:13,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:13,095 INFO L225 Difference]: With dead ends: 265 [2020-12-22 04:32:13,096 INFO L226 Difference]: Without dead ends: 261 [2020-12-22 04:32:13,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1336, Invalid=1634, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:32:13,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-22 04:32:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 254. [2020-12-22 04:32:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-12-22 04:32:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 303 transitions. [2020-12-22 04:32:13,101 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 303 transitions. Word has length 107 [2020-12-22 04:32:13,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:13,102 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 303 transitions. [2020-12-22 04:32:13,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 04:32:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 303 transitions. [2020-12-22 04:32:13,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 04:32:13,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:13,103 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:13,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 04:32:13,318 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:13,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:13,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1279685952, now seen corresponding path program 49 times [2020-12-22 04:32:13,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:13,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70133362] [2020-12-22 04:32:13,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:14,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70133362] [2020-12-22 04:32:14,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320610312] [2020-12-22 04:32:14,943 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:15,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:32:15,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:15,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:15,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 55 [2020-12-22 04:32:15,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053330497] [2020-12-22 04:32:15,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 04:32:15,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:15,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 04:32:15,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:32:15,279 INFO L87 Difference]: Start difference. First operand 254 states and 303 transitions. Second operand 55 states. [2020-12-22 04:32:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:15,871 INFO L93 Difference]: Finished difference Result 270 states and 321 transitions. [2020-12-22 04:32:15,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 04:32:15,871 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2020-12-22 04:32:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:15,872 INFO L225 Difference]: With dead ends: 270 [2020-12-22 04:32:15,873 INFO L226 Difference]: Without dead ends: 266 [2020-12-22 04:32:15,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1388, Invalid=1692, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:32:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-22 04:32:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 259. [2020-12-22 04:32:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-22 04:32:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 309 transitions. [2020-12-22 04:32:15,877 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 309 transitions. Word has length 109 [2020-12-22 04:32:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:15,878 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 309 transitions. [2020-12-22 04:32:15,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 04:32:15,878 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 309 transitions. [2020-12-22 04:32:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 04:32:15,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:15,879 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:16,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:16,093 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:16,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1462415067, now seen corresponding path program 50 times [2020-12-22 04:32:16,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:16,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409396451] [2020-12-22 04:32:16,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:17,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409396451] [2020-12-22 04:32:17,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744084749] [2020-12-22 04:32:17,934 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:18,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:32:18,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:18,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:32:18,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:18,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:18,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 56 [2020-12-22 04:32:18,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158410186] [2020-12-22 04:32:18,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:32:18,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:18,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:32:18,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:32:18,268 INFO L87 Difference]: Start difference. First operand 259 states and 309 transitions. Second operand 56 states. [2020-12-22 04:32:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:18,950 INFO L93 Difference]: Finished difference Result 275 states and 327 transitions. [2020-12-22 04:32:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:32:18,951 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2020-12-22 04:32:18,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:18,952 INFO L225 Difference]: With dead ends: 275 [2020-12-22 04:32:18,952 INFO L226 Difference]: Without dead ends: 271 [2020-12-22 04:32:18,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1441, Invalid=1751, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:32:18,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-12-22 04:32:18,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 264. [2020-12-22 04:32:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-12-22 04:32:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 315 transitions. [2020-12-22 04:32:18,957 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 315 transitions. Word has length 111 [2020-12-22 04:32:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:18,957 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 315 transitions. [2020-12-22 04:32:18,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:32:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 315 transitions. [2020-12-22 04:32:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 04:32:18,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:18,958 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:19,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:19,173 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash 971435446, now seen corresponding path program 51 times [2020-12-22 04:32:19,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:19,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687709019] [2020-12-22 04:32:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:21,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687709019] [2020-12-22 04:32:21,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575442191] [2020-12-22 04:32:21,071 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:21,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-22 04:32:21,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:21,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 04:32:21,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:21,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:21,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 57 [2020-12-22 04:32:21,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817261989] [2020-12-22 04:32:21,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 04:32:21,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:21,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 04:32:21,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=1702, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:32:21,468 INFO L87 Difference]: Start difference. First operand 264 states and 315 transitions. Second operand 57 states. [2020-12-22 04:32:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:22,122 INFO L93 Difference]: Finished difference Result 280 states and 333 transitions. [2020-12-22 04:32:22,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 04:32:22,123 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2020-12-22 04:32:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:22,124 INFO L225 Difference]: With dead ends: 280 [2020-12-22 04:32:22,125 INFO L226 Difference]: Without dead ends: 276 [2020-12-22 04:32:22,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1495, Invalid=1811, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:32:22,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-12-22 04:32:22,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 269. [2020-12-22 04:32:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-22 04:32:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 321 transitions. [2020-12-22 04:32:22,130 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 321 transitions. Word has length 113 [2020-12-22 04:32:22,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:22,130 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 321 transitions. [2020-12-22 04:32:22,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 04:32:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 321 transitions. [2020-12-22 04:32:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 04:32:22,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:22,131 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:22,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 04:32:22,345 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1586422225, now seen corresponding path program 52 times [2020-12-22 04:32:22,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:22,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151521132] [2020-12-22 04:32:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:24,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151521132] [2020-12-22 04:32:24,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724783900] [2020-12-22 04:32:24,270 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:24,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:32:24,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:24,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 04:32:24,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:24,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:24,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 58 [2020-12-22 04:32:24,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838304960] [2020-12-22 04:32:24,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 04:32:24,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:24,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 04:32:24,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:32:24,611 INFO L87 Difference]: Start difference. First operand 269 states and 321 transitions. Second operand 58 states. [2020-12-22 04:32:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:25,240 INFO L93 Difference]: Finished difference Result 285 states and 339 transitions. [2020-12-22 04:32:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 04:32:25,241 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2020-12-22 04:32:25,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:25,243 INFO L225 Difference]: With dead ends: 285 [2020-12-22 04:32:25,243 INFO L226 Difference]: Without dead ends: 281 [2020-12-22 04:32:25,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1550, Invalid=1872, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:32:25,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-12-22 04:32:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 274. [2020-12-22 04:32:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-12-22 04:32:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 327 transitions. [2020-12-22 04:32:25,248 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 327 transitions. Word has length 115 [2020-12-22 04:32:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:25,248 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 327 transitions. [2020-12-22 04:32:25,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 04:32:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 327 transitions. [2020-12-22 04:32:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 04:32:25,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:25,249 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:25,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:25,464 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:25,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:25,464 INFO L82 PathProgramCache]: Analyzing trace with hash -116770004, now seen corresponding path program 53 times [2020-12-22 04:32:25,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:25,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023603482] [2020-12-22 04:32:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:27,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023603482] [2020-12-22 04:32:27,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823475744] [2020-12-22 04:32:27,562 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:27,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-22 04:32:27,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:27,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 04:32:27,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:27,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:27,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 59 [2020-12-22 04:32:27,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573780562] [2020-12-22 04:32:27,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 04:32:27,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:27,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 04:32:27,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=1821, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:32:27,922 INFO L87 Difference]: Start difference. First operand 274 states and 327 transitions. Second operand 59 states. [2020-12-22 04:32:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:28,642 INFO L93 Difference]: Finished difference Result 290 states and 345 transitions. [2020-12-22 04:32:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 04:32:28,643 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 117 [2020-12-22 04:32:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:28,644 INFO L225 Difference]: With dead ends: 290 [2020-12-22 04:32:28,644 INFO L226 Difference]: Without dead ends: 286 [2020-12-22 04:32:28,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1606, Invalid=1934, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:32:28,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-12-22 04:32:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 279. [2020-12-22 04:32:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-12-22 04:32:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 333 transitions. [2020-12-22 04:32:28,649 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 333 transitions. Word has length 117 [2020-12-22 04:32:28,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:28,649 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 333 transitions. [2020-12-22 04:32:28,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 04:32:28,649 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 333 transitions. [2020-12-22 04:32:28,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 04:32:28,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:28,650 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:28,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 04:32:28,866 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:28,866 INFO L82 PathProgramCache]: Analyzing trace with hash -501962297, now seen corresponding path program 54 times [2020-12-22 04:32:28,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:28,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590849860] [2020-12-22 04:32:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:31,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590849860] [2020-12-22 04:32:31,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829502421] [2020-12-22 04:32:31,032 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:31,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-22 04:32:31,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:31,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 04:32:31,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:31,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:31,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 60 [2020-12-22 04:32:31,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965611397] [2020-12-22 04:32:31,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 04:32:31,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:31,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 04:32:31,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:32:31,422 INFO L87 Difference]: Start difference. First operand 279 states and 333 transitions. Second operand 60 states. [2020-12-22 04:32:32,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:32,038 INFO L93 Difference]: Finished difference Result 295 states and 351 transitions. [2020-12-22 04:32:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 04:32:32,039 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 119 [2020-12-22 04:32:32,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:32,041 INFO L225 Difference]: With dead ends: 295 [2020-12-22 04:32:32,041 INFO L226 Difference]: Without dead ends: 291 [2020-12-22 04:32:32,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1663, Invalid=1997, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:32:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-22 04:32:32,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 284. [2020-12-22 04:32:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-12-22 04:32:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 339 transitions. [2020-12-22 04:32:32,046 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 339 transitions. Word has length 119 [2020-12-22 04:32:32,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:32,046 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 339 transitions. [2020-12-22 04:32:32,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 04:32:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 339 transitions. [2020-12-22 04:32:32,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 04:32:32,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:32,047 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:32,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 04:32:32,263 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:32,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:32,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1304568414, now seen corresponding path program 55 times [2020-12-22 04:32:32,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:32,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134147951] [2020-12-22 04:32:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:34,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134147951] [2020-12-22 04:32:34,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434869541] [2020-12-22 04:32:34,499 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:34,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:32:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:34,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:34,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 61 [2020-12-22 04:32:34,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117172547] [2020-12-22 04:32:34,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 04:32:34,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:34,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 04:32:34,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:32:34,819 INFO L87 Difference]: Start difference. First operand 284 states and 339 transitions. Second operand 61 states. [2020-12-22 04:32:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:35,539 INFO L93 Difference]: Finished difference Result 300 states and 357 transitions. [2020-12-22 04:32:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 04:32:35,540 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 121 [2020-12-22 04:32:35,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:35,542 INFO L225 Difference]: With dead ends: 300 [2020-12-22 04:32:35,542 INFO L226 Difference]: Without dead ends: 296 [2020-12-22 04:32:35,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1721, Invalid=2061, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:32:35,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-12-22 04:32:35,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 289. [2020-12-22 04:32:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-22 04:32:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 345 transitions. [2020-12-22 04:32:35,548 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 345 transitions. Word has length 121 [2020-12-22 04:32:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:35,549 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 345 transitions. [2020-12-22 04:32:35,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 04:32:35,549 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 345 transitions. [2020-12-22 04:32:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 04:32:35,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:35,550 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:35,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:35,761 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:35,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:35,761 INFO L82 PathProgramCache]: Analyzing trace with hash 485066429, now seen corresponding path program 56 times [2020-12-22 04:32:35,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:35,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761166041] [2020-12-22 04:32:35,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:37,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761166041] [2020-12-22 04:32:37,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498008414] [2020-12-22 04:32:37,999 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:38,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:32:38,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:38,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 04:32:38,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:38,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:38,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 62 [2020-12-22 04:32:38,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424799354] [2020-12-22 04:32:38,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 04:32:38,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:38,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 04:32:38,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:32:38,341 INFO L87 Difference]: Start difference. First operand 289 states and 345 transitions. Second operand 62 states. [2020-12-22 04:32:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:39,115 INFO L93 Difference]: Finished difference Result 305 states and 363 transitions. [2020-12-22 04:32:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 04:32:39,115 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 123 [2020-12-22 04:32:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:39,117 INFO L225 Difference]: With dead ends: 305 [2020-12-22 04:32:39,117 INFO L226 Difference]: Without dead ends: 301 [2020-12-22 04:32:39,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1780, Invalid=2126, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:32:39,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-12-22 04:32:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 294. [2020-12-22 04:32:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-12-22 04:32:39,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 351 transitions. [2020-12-22 04:32:39,121 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 351 transitions. Word has length 123 [2020-12-22 04:32:39,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:39,121 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 351 transitions. [2020-12-22 04:32:39,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 04:32:39,121 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 351 transitions. [2020-12-22 04:32:39,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 04:32:39,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:39,122 INFO L422 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:39,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 04:32:39,337 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:39,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:39,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1957735144, now seen corresponding path program 57 times [2020-12-22 04:32:39,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:39,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194969857] [2020-12-22 04:32:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:41,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194969857] [2020-12-22 04:32:41,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109781003] [2020-12-22 04:32:41,723 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:41,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-22 04:32:41,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:41,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 04:32:41,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:42,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:42,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 63 [2020-12-22 04:32:42,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709565796] [2020-12-22 04:32:42,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 04:32:42,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:42,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 04:32:42,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1835, Invalid=2071, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:32:42,151 INFO L87 Difference]: Start difference. First operand 294 states and 351 transitions. Second operand 63 states. [2020-12-22 04:32:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:43,092 INFO L93 Difference]: Finished difference Result 310 states and 369 transitions. [2020-12-22 04:32:43,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 04:32:43,092 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 125 [2020-12-22 04:32:43,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:43,094 INFO L225 Difference]: With dead ends: 310 [2020-12-22 04:32:43,094 INFO L226 Difference]: Without dead ends: 306 [2020-12-22 04:32:43,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1840, Invalid=2192, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:32:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-12-22 04:32:43,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 299. [2020-12-22 04:32:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-12-22 04:32:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 357 transitions. [2020-12-22 04:32:43,097 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 357 transitions. Word has length 125 [2020-12-22 04:32:43,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:43,098 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 357 transitions. [2020-12-22 04:32:43,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 04:32:43,098 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 357 transitions. [2020-12-22 04:32:43,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 04:32:43,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:43,098 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:43,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:43,303 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:43,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:43,303 INFO L82 PathProgramCache]: Analyzing trace with hash -142935885, now seen corresponding path program 58 times [2020-12-22 04:32:43,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:43,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361431922] [2020-12-22 04:32:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:45,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361431922] [2020-12-22 04:32:45,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817850252] [2020-12-22 04:32:45,777 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:45,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:32:45,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 04:32:45,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:46,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:46,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 64 [2020-12-22 04:32:46,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955482587] [2020-12-22 04:32:46,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 04:32:46,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:46,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 04:32:46,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:32:46,111 INFO L87 Difference]: Start difference. First operand 299 states and 357 transitions. Second operand 64 states. [2020-12-22 04:32:46,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:46,831 INFO L93 Difference]: Finished difference Result 315 states and 375 transitions. [2020-12-22 04:32:46,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 04:32:46,831 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 127 [2020-12-22 04:32:46,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:46,833 INFO L225 Difference]: With dead ends: 315 [2020-12-22 04:32:46,833 INFO L226 Difference]: Without dead ends: 311 [2020-12-22 04:32:46,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1901, Invalid=2259, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:32:46,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-12-22 04:32:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 304. [2020-12-22 04:32:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-12-22 04:32:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 363 transitions. [2020-12-22 04:32:46,839 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 363 transitions. Word has length 127 [2020-12-22 04:32:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:46,840 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 363 transitions. [2020-12-22 04:32:46,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 04:32:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 363 transitions. [2020-12-22 04:32:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 04:32:46,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:46,841 INFO L422 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:47,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 04:32:47,052 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:47,052 INFO L82 PathProgramCache]: Analyzing trace with hash 122429838, now seen corresponding path program 59 times [2020-12-22 04:32:47,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:47,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372476864] [2020-12-22 04:32:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:49,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372476864] [2020-12-22 04:32:49,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814457789] [2020-12-22 04:32:49,600 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:49,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-22 04:32:49,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:49,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 04:32:49,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:49,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:49,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 65 [2020-12-22 04:32:49,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196059784] [2020-12-22 04:32:49,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 04:32:49,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:49,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 04:32:49,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=2202, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:32:49,989 INFO L87 Difference]: Start difference. First operand 304 states and 363 transitions. Second operand 65 states. [2020-12-22 04:32:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:50,862 INFO L93 Difference]: Finished difference Result 320 states and 381 transitions. [2020-12-22 04:32:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 04:32:50,863 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 129 [2020-12-22 04:32:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:50,865 INFO L225 Difference]: With dead ends: 320 [2020-12-22 04:32:50,865 INFO L226 Difference]: Without dead ends: 316 [2020-12-22 04:32:50,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1963, Invalid=2327, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 04:32:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-12-22 04:32:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 309. [2020-12-22 04:32:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-12-22 04:32:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 369 transitions. [2020-12-22 04:32:50,869 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 369 transitions. Word has length 129 [2020-12-22 04:32:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:50,870 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 369 transitions. [2020-12-22 04:32:50,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 04:32:50,870 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 369 transitions. [2020-12-22 04:32:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 04:32:50,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:50,871 INFO L422 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:51,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:51,085 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:51,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:51,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1735819177, now seen corresponding path program 60 times [2020-12-22 04:32:51,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:51,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302889245] [2020-12-22 04:32:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:53,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302889245] [2020-12-22 04:32:53,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086559101] [2020-12-22 04:32:53,776 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:54,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-22 04:32:54,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:54,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:32:54,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:54,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:54,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 66 [2020-12-22 04:32:54,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344963354] [2020-12-22 04:32:54,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 04:32:54,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:54,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 04:32:54,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 04:32:54,216 INFO L87 Difference]: Start difference. First operand 309 states and 369 transitions. Second operand 66 states. [2020-12-22 04:32:55,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:55,062 INFO L93 Difference]: Finished difference Result 325 states and 387 transitions. [2020-12-22 04:32:55,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 04:32:55,062 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 131 [2020-12-22 04:32:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:55,065 INFO L225 Difference]: With dead ends: 325 [2020-12-22 04:32:55,065 INFO L226 Difference]: Without dead ends: 321 [2020-12-22 04:32:55,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2026, Invalid=2396, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 04:32:55,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-12-22 04:32:55,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 314. [2020-12-22 04:32:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-12-22 04:32:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 375 transitions. [2020-12-22 04:32:55,069 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 375 transitions. Word has length 131 [2020-12-22 04:32:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:55,069 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 375 transitions. [2020-12-22 04:32:55,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 04:32:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 375 transitions. [2020-12-22 04:32:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 04:32:55,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:55,071 INFO L422 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:55,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-12-22 04:32:55,285 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:55,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1719780100, now seen corresponding path program 61 times [2020-12-22 04:32:55,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:55,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312825023] [2020-12-22 04:32:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:58,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312825023] [2020-12-22 04:32:58,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011110099] [2020-12-22 04:32:58,085 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:58,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 04:32:58,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:58,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:58,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 67 [2020-12-22 04:32:58,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77517929] [2020-12-22 04:32:58,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 04:32:58,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:58,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 04:32:58,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2085, Invalid=2337, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 04:32:58,442 INFO L87 Difference]: Start difference. First operand 314 states and 375 transitions. Second operand 67 states. [2020-12-22 04:32:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:59,381 INFO L93 Difference]: Finished difference Result 330 states and 393 transitions. [2020-12-22 04:32:59,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 04:32:59,382 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 133 [2020-12-22 04:32:59,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:59,383 INFO L225 Difference]: With dead ends: 330 [2020-12-22 04:32:59,383 INFO L226 Difference]: Without dead ends: 326 [2020-12-22 04:32:59,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2090, Invalid=2466, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:32:59,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-12-22 04:32:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 319. [2020-12-22 04:32:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-12-22 04:32:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 381 transitions. [2020-12-22 04:32:59,388 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 381 transitions. Word has length 133 [2020-12-22 04:32:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:59,388 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 381 transitions. [2020-12-22 04:32:59,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 04:32:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 381 transitions. [2020-12-22 04:32:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 04:32:59,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:59,389 INFO L422 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:59,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:59,604 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:59,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:59,604 INFO L82 PathProgramCache]: Analyzing trace with hash -808871009, now seen corresponding path program 62 times [2020-12-22 04:32:59,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:59,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510331010] [2020-12-22 04:32:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:02,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510331010] [2020-12-22 04:33:02,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140160710] [2020-12-22 04:33:02,384 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:02,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:33:02,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:02,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 04:33:02,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:02,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:02,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 68 [2020-12-22 04:33:02,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143881767] [2020-12-22 04:33:02,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 04:33:02,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:02,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 04:33:02,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:33:02,742 INFO L87 Difference]: Start difference. First operand 319 states and 381 transitions. Second operand 68 states. [2020-12-22 04:33:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:03,547 INFO L93 Difference]: Finished difference Result 335 states and 399 transitions. [2020-12-22 04:33:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 04:33:03,548 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 135 [2020-12-22 04:33:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:03,550 INFO L225 Difference]: With dead ends: 335 [2020-12-22 04:33:03,550 INFO L226 Difference]: Without dead ends: 331 [2020-12-22 04:33:03,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2155, Invalid=2537, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 04:33:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-12-22 04:33:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2020-12-22 04:33:03,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-12-22 04:33:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 387 transitions. [2020-12-22 04:33:03,554 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 387 transitions. Word has length 135 [2020-12-22 04:33:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:03,555 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 387 transitions. [2020-12-22 04:33:03,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 04:33:03,555 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 387 transitions. [2020-12-22 04:33:03,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 04:33:03,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:03,556 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:03,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-22 04:33:03,756 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:03,757 INFO L82 PathProgramCache]: Analyzing trace with hash 108902778, now seen corresponding path program 63 times [2020-12-22 04:33:03,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:03,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610768988] [2020-12-22 04:33:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:06,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610768988] [2020-12-22 04:33:06,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695233160] [2020-12-22 04:33:06,693 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:06,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-22 04:33:06,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:06,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 04:33:06,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:07,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:07,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2020-12-22 04:33:07,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401221619] [2020-12-22 04:33:07,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-22 04:33:07,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:07,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-22 04:33:07,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2216, Invalid=2476, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 04:33:07,133 INFO L87 Difference]: Start difference. First operand 324 states and 387 transitions. Second operand 69 states. [2020-12-22 04:33:08,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:08,028 INFO L93 Difference]: Finished difference Result 340 states and 405 transitions. [2020-12-22 04:33:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 04:33:08,029 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 137 [2020-12-22 04:33:08,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:08,031 INFO L225 Difference]: With dead ends: 340 [2020-12-22 04:33:08,031 INFO L226 Difference]: Without dead ends: 336 [2020-12-22 04:33:08,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2221, Invalid=2609, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:33:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-22 04:33:08,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 329. [2020-12-22 04:33:08,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-12-22 04:33:08,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 393 transitions. [2020-12-22 04:33:08,035 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 393 transitions. Word has length 137 [2020-12-22 04:33:08,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:08,036 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 393 transitions. [2020-12-22 04:33:08,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-22 04:33:08,036 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 393 transitions. [2020-12-22 04:33:08,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 04:33:08,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:08,037 INFO L422 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:08,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:08,237 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:08,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:08,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1621216405, now seen corresponding path program 64 times [2020-12-22 04:33:08,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:08,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078400590] [2020-12-22 04:33:08,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:11,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078400590] [2020-12-22 04:33:11,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041672773] [2020-12-22 04:33:11,203 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:11,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:33:11,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:11,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-22 04:33:11,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:11,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:11,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2020-12-22 04:33:11,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719636338] [2020-12-22 04:33:11,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 04:33:11,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:11,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 04:33:11,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=2547, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:33:11,606 INFO L87 Difference]: Start difference. First operand 329 states and 393 transitions. Second operand 70 states. [2020-12-22 04:33:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:12,550 INFO L93 Difference]: Finished difference Result 345 states and 411 transitions. [2020-12-22 04:33:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 04:33:12,551 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 139 [2020-12-22 04:33:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:12,553 INFO L225 Difference]: With dead ends: 345 [2020-12-22 04:33:12,553 INFO L226 Difference]: Without dead ends: 341 [2020-12-22 04:33:12,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2288, Invalid=2682, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 04:33:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-12-22 04:33:12,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 334. [2020-12-22 04:33:12,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-12-22 04:33:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 399 transitions. [2020-12-22 04:33:12,558 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 399 transitions. Word has length 139 [2020-12-22 04:33:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:12,558 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 399 transitions. [2020-12-22 04:33:12,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 04:33:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 399 transitions. [2020-12-22 04:33:12,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 04:33:12,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:12,559 INFO L422 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:12,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-22 04:33:12,772 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:12,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:12,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1039301392, now seen corresponding path program 65 times [2020-12-22 04:33:12,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:12,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215785953] [2020-12-22 04:33:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:15,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215785953] [2020-12-22 04:33:15,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770952382] [2020-12-22 04:33:15,916 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:16,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-22 04:33:16,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:16,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:33:16,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:16,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:16,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2020-12-22 04:33:16,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559796835] [2020-12-22 04:33:16,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-22 04:33:16,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:16,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-22 04:33:16,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=2619, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 04:33:16,355 INFO L87 Difference]: Start difference. First operand 334 states and 399 transitions. Second operand 71 states. [2020-12-22 04:33:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:17,185 INFO L93 Difference]: Finished difference Result 350 states and 417 transitions. [2020-12-22 04:33:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 04:33:17,186 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 141 [2020-12-22 04:33:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:17,188 INFO L225 Difference]: With dead ends: 350 [2020-12-22 04:33:17,188 INFO L226 Difference]: Without dead ends: 346 [2020-12-22 04:33:17,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2356, Invalid=2756, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 04:33:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-12-22 04:33:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 339. [2020-12-22 04:33:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-12-22 04:33:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 405 transitions. [2020-12-22 04:33:17,192 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 405 transitions. Word has length 141 [2020-12-22 04:33:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:17,192 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 405 transitions. [2020-12-22 04:33:17,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-22 04:33:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 405 transitions. [2020-12-22 04:33:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 04:33:17,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:17,193 INFO L422 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:17,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 04:33:17,394 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:17,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:17,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2003604107, now seen corresponding path program 66 times [2020-12-22 04:33:17,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:17,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075251249] [2020-12-22 04:33:17,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:20,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075251249] [2020-12-22 04:33:20,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877625167] [2020-12-22 04:33:20,557 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:20,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-22 04:33:20,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:20,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 04:33:20,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:21,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:21,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 72 [2020-12-22 04:33:21,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437430225] [2020-12-22 04:33:21,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-22 04:33:21,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:21,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-22 04:33:21,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=2692, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 04:33:21,041 INFO L87 Difference]: Start difference. First operand 339 states and 405 transitions. Second operand 72 states. [2020-12-22 04:33:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:21,901 INFO L93 Difference]: Finished difference Result 355 states and 423 transitions. [2020-12-22 04:33:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 04:33:21,902 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 143 [2020-12-22 04:33:21,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:21,904 INFO L225 Difference]: With dead ends: 355 [2020-12-22 04:33:21,904 INFO L226 Difference]: Without dead ends: 351 [2020-12-22 04:33:21,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2425, Invalid=2831, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 04:33:21,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-12-22 04:33:21,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 344. [2020-12-22 04:33:21,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-12-22 04:33:21,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 411 transitions. [2020-12-22 04:33:21,908 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 411 transitions. Word has length 143 [2020-12-22 04:33:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:21,909 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 411 transitions. [2020-12-22 04:33:21,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-22 04:33:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 411 transitions. [2020-12-22 04:33:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 04:33:21,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:21,910 INFO L422 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:22,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-22 04:33:22,121 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:22,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:22,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1363060070, now seen corresponding path program 67 times [2020-12-22 04:33:22,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:22,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036186820] [2020-12-22 04:33:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:25,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036186820] [2020-12-22 04:33:25,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484591921] [2020-12-22 04:33:25,358 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:25,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 04:33:25,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:25,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:25,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 73 [2020-12-22 04:33:25,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143712548] [2020-12-22 04:33:25,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-22 04:33:25,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:25,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-22 04:33:25,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2490, Invalid=2766, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 04:33:25,759 INFO L87 Difference]: Start difference. First operand 344 states and 411 transitions. Second operand 73 states. [2020-12-22 04:33:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:26,789 INFO L93 Difference]: Finished difference Result 360 states and 429 transitions. [2020-12-22 04:33:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-22 04:33:26,791 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 145 [2020-12-22 04:33:26,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:26,801 INFO L225 Difference]: With dead ends: 360 [2020-12-22 04:33:26,801 INFO L226 Difference]: Without dead ends: 356 [2020-12-22 04:33:26,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2495, Invalid=2907, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 04:33:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-12-22 04:33:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 349. [2020-12-22 04:33:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-12-22 04:33:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 417 transitions. [2020-12-22 04:33:26,807 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 417 transitions. Word has length 145 [2020-12-22 04:33:26,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:26,807 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 417 transitions. [2020-12-22 04:33:26,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-22 04:33:26,807 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 417 transitions. [2020-12-22 04:33:26,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 04:33:26,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:26,808 INFO L422 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:27,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:27,023 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:27,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:27,023 INFO L82 PathProgramCache]: Analyzing trace with hash -19436159, now seen corresponding path program 68 times [2020-12-22 04:33:27,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:27,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106720314] [2020-12-22 04:33:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:30,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106720314] [2020-12-22 04:33:30,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714654849] [2020-12-22 04:33:30,345 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:30,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:33:30,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:30,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 04:33:30,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:30,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:30,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 74 [2020-12-22 04:33:30,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811196665] [2020-12-22 04:33:30,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 04:33:30,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:30,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 04:33:30,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2561, Invalid=2841, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 04:33:30,747 INFO L87 Difference]: Start difference. First operand 349 states and 417 transitions. Second operand 74 states. [2020-12-22 04:33:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:31,645 INFO L93 Difference]: Finished difference Result 365 states and 435 transitions. [2020-12-22 04:33:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-22 04:33:31,646 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 147 [2020-12-22 04:33:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:31,649 INFO L225 Difference]: With dead ends: 365 [2020-12-22 04:33:31,649 INFO L226 Difference]: Without dead ends: 361 [2020-12-22 04:33:31,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2566, Invalid=2984, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:33:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-12-22 04:33:31,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 354. [2020-12-22 04:33:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-12-22 04:33:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 423 transitions. [2020-12-22 04:33:31,654 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 423 transitions. Word has length 147 [2020-12-22 04:33:31,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:31,655 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 423 transitions. [2020-12-22 04:33:31,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-22 04:33:31,655 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 423 transitions. [2020-12-22 04:33:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 04:33:31,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:31,656 INFO L422 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:31,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-22 04:33:31,871 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:31,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:31,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1453417764, now seen corresponding path program 69 times [2020-12-22 04:33:31,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:31,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230507058] [2020-12-22 04:33:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:35,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230507058] [2020-12-22 04:33:35,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479348012] [2020-12-22 04:33:35,377 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:35,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2020-12-22 04:33:35,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:35,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-22 04:33:35,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:35,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:35,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 75 [2020-12-22 04:33:35,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187629261] [2020-12-22 04:33:35,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-22 04:33:35,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:35,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-22 04:33:35,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2633, Invalid=2917, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:33:35,874 INFO L87 Difference]: Start difference. First operand 354 states and 423 transitions. Second operand 75 states. [2020-12-22 04:33:36,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:36,983 INFO L93 Difference]: Finished difference Result 370 states and 441 transitions. [2020-12-22 04:33:36,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-22 04:33:36,984 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 149 [2020-12-22 04:33:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:36,986 INFO L225 Difference]: With dead ends: 370 [2020-12-22 04:33:36,986 INFO L226 Difference]: Without dead ends: 366 [2020-12-22 04:33:36,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2638, Invalid=3062, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 04:33:36,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-12-22 04:33:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 359. [2020-12-22 04:33:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-12-22 04:33:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 429 transitions. [2020-12-22 04:33:36,991 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 429 transitions. Word has length 149 [2020-12-22 04:33:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:36,991 INFO L481 AbstractCegarLoop]: Abstraction has 359 states and 429 transitions. [2020-12-22 04:33:36,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-22 04:33:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 429 transitions. [2020-12-22 04:33:36,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 04:33:36,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:36,993 INFO L422 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:37,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:37,207 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:37,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:37,207 INFO L82 PathProgramCache]: Analyzing trace with hash -825238153, now seen corresponding path program 70 times [2020-12-22 04:33:37,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:37,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455377661] [2020-12-22 04:33:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:40,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455377661] [2020-12-22 04:33:40,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124152916] [2020-12-22 04:33:40,744 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:40,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:33:40,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:40,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 04:33:40,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:41,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:41,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 76 [2020-12-22 04:33:41,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879780534] [2020-12-22 04:33:41,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-22 04:33:41,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:41,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-22 04:33:41,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2706, Invalid=2994, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 04:33:41,172 INFO L87 Difference]: Start difference. First operand 359 states and 429 transitions. Second operand 76 states. [2020-12-22 04:33:42,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:42,472 INFO L93 Difference]: Finished difference Result 375 states and 447 transitions. [2020-12-22 04:33:42,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-22 04:33:42,473 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 151 [2020-12-22 04:33:42,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:42,475 INFO L225 Difference]: With dead ends: 375 [2020-12-22 04:33:42,475 INFO L226 Difference]: Without dead ends: 371 [2020-12-22 04:33:42,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2711, Invalid=3141, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 04:33:42,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-12-22 04:33:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 364. [2020-12-22 04:33:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-12-22 04:33:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 435 transitions. [2020-12-22 04:33:42,479 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 435 transitions. Word has length 151 [2020-12-22 04:33:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:42,480 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 435 transitions. [2020-12-22 04:33:42,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-22 04:33:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 435 transitions. [2020-12-22 04:33:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 04:33:42,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:42,481 INFO L422 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:42,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-22 04:33:42,683 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:42,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1559946578, now seen corresponding path program 71 times [2020-12-22 04:33:42,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:42,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516720270] [2020-12-22 04:33:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:46,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516720270] [2020-12-22 04:33:46,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966143668] [2020-12-22 04:33:46,341 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:46,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-22 04:33:46,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:46,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 04:33:46,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:46,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:46,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 77 [2020-12-22 04:33:46,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372691859] [2020-12-22 04:33:46,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-22 04:33:46,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:46,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-22 04:33:46,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2780, Invalid=3072, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 04:33:46,815 INFO L87 Difference]: Start difference. First operand 364 states and 435 transitions. Second operand 77 states. [2020-12-22 04:33:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:48,154 INFO L93 Difference]: Finished difference Result 380 states and 453 transitions. [2020-12-22 04:33:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 04:33:48,154 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 153 [2020-12-22 04:33:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:48,156 INFO L225 Difference]: With dead ends: 380 [2020-12-22 04:33:48,156 INFO L226 Difference]: Without dead ends: 376 [2020-12-22 04:33:48,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2785, Invalid=3221, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 04:33:48,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-12-22 04:33:48,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 369. [2020-12-22 04:33:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-12-22 04:33:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 441 transitions. [2020-12-22 04:33:48,160 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 441 transitions. Word has length 153 [2020-12-22 04:33:48,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:48,160 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 441 transitions. [2020-12-22 04:33:48,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-22 04:33:48,160 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 441 transitions. [2020-12-22 04:33:48,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 04:33:48,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:48,161 INFO L422 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:48,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:48,377 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:48,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:48,378 INFO L82 PathProgramCache]: Analyzing trace with hash 209937005, now seen corresponding path program 72 times [2020-12-22 04:33:48,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:48,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951276168] [2020-12-22 04:33:48,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:52,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951276168] [2020-12-22 04:33:52,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374175116] [2020-12-22 04:33:52,186 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:52,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2020-12-22 04:33:52,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:52,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 04:33:52,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:52,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:52,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 78 [2020-12-22 04:33:52,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563842512] [2020-12-22 04:33:52,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-22 04:33:52,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:52,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-22 04:33:52,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2855, Invalid=3151, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 04:33:52,694 INFO L87 Difference]: Start difference. First operand 369 states and 441 transitions. Second operand 78 states. [2020-12-22 04:33:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:54,059 INFO L93 Difference]: Finished difference Result 385 states and 459 transitions. [2020-12-22 04:33:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-22 04:33:54,060 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 155 [2020-12-22 04:33:54,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:54,062 INFO L225 Difference]: With dead ends: 385 [2020-12-22 04:33:54,062 INFO L226 Difference]: Without dead ends: 381 [2020-12-22 04:33:54,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2860, Invalid=3302, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 04:33:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-22 04:33:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 374. [2020-12-22 04:33:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-12-22 04:33:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 447 transitions. [2020-12-22 04:33:54,066 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 447 transitions. Word has length 155 [2020-12-22 04:33:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:54,067 INFO L481 AbstractCegarLoop]: Abstraction has 374 states and 447 transitions. [2020-12-22 04:33:54,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-22 04:33:54,067 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 447 transitions. [2020-12-22 04:33:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 04:33:54,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:54,068 INFO L422 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:54,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:54,268 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:54,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:54,269 INFO L82 PathProgramCache]: Analyzing trace with hash -69139256, now seen corresponding path program 73 times [2020-12-22 04:33:54,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:54,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002771904] [2020-12-22 04:33:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:58,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002771904] [2020-12-22 04:33:58,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966904453] [2020-12-22 04:33:58,219 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:58,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 04:33:58,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:58,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:58,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 79 [2020-12-22 04:33:58,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054607857] [2020-12-22 04:33:58,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-22 04:33:58,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:58,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-22 04:33:58,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2931, Invalid=3231, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 04:33:58,662 INFO L87 Difference]: Start difference. First operand 374 states and 447 transitions. Second operand 79 states. [2020-12-22 04:33:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:59,959 INFO L93 Difference]: Finished difference Result 390 states and 465 transitions. [2020-12-22 04:33:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-22 04:33:59,960 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 157 [2020-12-22 04:33:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:59,962 INFO L225 Difference]: With dead ends: 390 [2020-12-22 04:33:59,962 INFO L226 Difference]: Without dead ends: 386 [2020-12-22 04:33:59,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2936, Invalid=3384, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 04:33:59,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-12-22 04:33:59,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 379. [2020-12-22 04:33:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-12-22 04:33:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 453 transitions. [2020-12-22 04:33:59,967 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 453 transitions. Word has length 157 [2020-12-22 04:33:59,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:59,967 INFO L481 AbstractCegarLoop]: Abstraction has 379 states and 453 transitions. [2020-12-22 04:33:59,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-22 04:33:59,967 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 453 transitions. [2020-12-22 04:33:59,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 04:33:59,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:59,968 INFO L422 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:00,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:00,169 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:00,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1973453725, now seen corresponding path program 74 times [2020-12-22 04:34:00,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:00,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570227031] [2020-12-22 04:34:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:04,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570227031] [2020-12-22 04:34:04,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305084609] [2020-12-22 04:34:04,131 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:04,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:34:04,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:04,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-22 04:34:04,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:04,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:04,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 80 [2020-12-22 04:34:04,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451461140] [2020-12-22 04:34:04,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-22 04:34:04,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:04,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-22 04:34:04,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3008, Invalid=3312, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 04:34:04,543 INFO L87 Difference]: Start difference. First operand 379 states and 453 transitions. Second operand 80 states. [2020-12-22 04:34:05,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:05,701 INFO L93 Difference]: Finished difference Result 395 states and 471 transitions. [2020-12-22 04:34:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-22 04:34:05,702 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 159 [2020-12-22 04:34:05,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:05,704 INFO L225 Difference]: With dead ends: 395 [2020-12-22 04:34:05,704 INFO L226 Difference]: Without dead ends: 391 [2020-12-22 04:34:05,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3013, Invalid=3467, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 04:34:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-12-22 04:34:05,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 384. [2020-12-22 04:34:05,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-12-22 04:34:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 459 transitions. [2020-12-22 04:34:05,709 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 459 transitions. Word has length 159 [2020-12-22 04:34:05,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:05,709 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 459 transitions. [2020-12-22 04:34:05,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-22 04:34:05,709 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 459 transitions. [2020-12-22 04:34:05,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 04:34:05,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:05,710 INFO L422 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:05,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-12-22 04:34:05,911 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:05,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1931376958, now seen corresponding path program 75 times [2020-12-22 04:34:05,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:05,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688819295] [2020-12-22 04:34:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:10,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688819295] [2020-12-22 04:34:10,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390277984] [2020-12-22 04:34:10,041 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:10,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2020-12-22 04:34:10,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:10,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-22 04:34:10,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:10,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:10,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 81 [2020-12-22 04:34:10,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886640434] [2020-12-22 04:34:10,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-22 04:34:10,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:10,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-22 04:34:10,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3086, Invalid=3394, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 04:34:10,573 INFO L87 Difference]: Start difference. First operand 384 states and 459 transitions. Second operand 81 states. [2020-12-22 04:34:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:11,985 INFO L93 Difference]: Finished difference Result 400 states and 477 transitions. [2020-12-22 04:34:11,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-22 04:34:11,986 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 161 [2020-12-22 04:34:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:11,988 INFO L225 Difference]: With dead ends: 400 [2020-12-22 04:34:11,988 INFO L226 Difference]: Without dead ends: 396 [2020-12-22 04:34:11,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3091, Invalid=3551, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 04:34:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-12-22 04:34:11,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 389. [2020-12-22 04:34:11,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-12-22 04:34:11,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 465 transitions. [2020-12-22 04:34:11,995 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 465 transitions. Word has length 161 [2020-12-22 04:34:11,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:11,995 INFO L481 AbstractCegarLoop]: Abstraction has 389 states and 465 transitions. [2020-12-22 04:34:11,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-22 04:34:11,995 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 465 transitions. [2020-12-22 04:34:11,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 04:34:11,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:11,997 INFO L422 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:12,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:12,213 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:12,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:12,214 INFO L82 PathProgramCache]: Analyzing trace with hash 672246617, now seen corresponding path program 76 times [2020-12-22 04:34:12,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:12,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529467235] [2020-12-22 04:34:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:16,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529467235] [2020-12-22 04:34:16,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665941274] [2020-12-22 04:34:16,422 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:16,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:34:16,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:16,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-22 04:34:16,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:16,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:16,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 82 [2020-12-22 04:34:16,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215459553] [2020-12-22 04:34:16,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-22 04:34:16,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:16,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-22 04:34:16,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3165, Invalid=3477, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 04:34:16,858 INFO L87 Difference]: Start difference. First operand 389 states and 465 transitions. Second operand 82 states. [2020-12-22 04:34:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:18,109 INFO L93 Difference]: Finished difference Result 405 states and 483 transitions. [2020-12-22 04:34:18,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-22 04:34:18,110 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 163 [2020-12-22 04:34:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:18,112 INFO L225 Difference]: With dead ends: 405 [2020-12-22 04:34:18,113 INFO L226 Difference]: Without dead ends: 401 [2020-12-22 04:34:18,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3170, Invalid=3636, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 04:34:18,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-12-22 04:34:18,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 394. [2020-12-22 04:34:18,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-12-22 04:34:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 471 transitions. [2020-12-22 04:34:18,117 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 471 transitions. Word has length 163 [2020-12-22 04:34:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:18,117 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 471 transitions. [2020-12-22 04:34:18,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-22 04:34:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 471 transitions. [2020-12-22 04:34:18,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-22 04:34:18,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:18,118 INFO L422 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:18,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:18,320 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:18,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1828766388, now seen corresponding path program 77 times [2020-12-22 04:34:18,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:18,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253863837] [2020-12-22 04:34:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:22,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253863837] [2020-12-22 04:34:22,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196275303] [2020-12-22 04:34:22,630 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:22,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-22 04:34:22,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:22,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 04:34:22,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:23,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:23,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 83 [2020-12-22 04:34:23,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870592216] [2020-12-22 04:34:23,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-22 04:34:23,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:23,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-22 04:34:23,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3245, Invalid=3561, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 04:34:23,126 INFO L87 Difference]: Start difference. First operand 394 states and 471 transitions. Second operand 83 states. [2020-12-22 04:34:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:24,639 INFO L93 Difference]: Finished difference Result 410 states and 489 transitions. [2020-12-22 04:34:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-22 04:34:24,640 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 165 [2020-12-22 04:34:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:24,642 INFO L225 Difference]: With dead ends: 410 [2020-12-22 04:34:24,642 INFO L226 Difference]: Without dead ends: 406 [2020-12-22 04:34:24,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3250, Invalid=3722, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 04:34:24,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-12-22 04:34:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 399. [2020-12-22 04:34:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-12-22 04:34:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 477 transitions. [2020-12-22 04:34:24,646 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 477 transitions. Word has length 165 [2020-12-22 04:34:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:24,647 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 477 transitions. [2020-12-22 04:34:24,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-22 04:34:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 477 transitions. [2020-12-22 04:34:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-22 04:34:24,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:24,648 INFO L422 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:24,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-22 04:34:24,849 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:24,849 INFO L82 PathProgramCache]: Analyzing trace with hash 847736655, now seen corresponding path program 78 times [2020-12-22 04:34:24,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:24,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554609054] [2020-12-22 04:34:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:29,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554609054] [2020-12-22 04:34:29,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894558120] [2020-12-22 04:34:29,304 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:29,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2020-12-22 04:34:29,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:29,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-22 04:34:29,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:29,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:29,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 84 [2020-12-22 04:34:29,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51792731] [2020-12-22 04:34:29,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-22 04:34:29,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:29,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-22 04:34:29,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3326, Invalid=3646, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 04:34:29,851 INFO L87 Difference]: Start difference. First operand 399 states and 477 transitions. Second operand 84 states. [2020-12-22 04:34:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:31,471 INFO L93 Difference]: Finished difference Result 415 states and 495 transitions. [2020-12-22 04:34:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 04:34:31,472 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 167 [2020-12-22 04:34:31,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:31,475 INFO L225 Difference]: With dead ends: 415 [2020-12-22 04:34:31,475 INFO L226 Difference]: Without dead ends: 411 [2020-12-22 04:34:31,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3331, Invalid=3809, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 04:34:31,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-12-22 04:34:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 404. [2020-12-22 04:34:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-12-22 04:34:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 483 transitions. [2020-12-22 04:34:31,479 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 483 transitions. Word has length 167 [2020-12-22 04:34:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:31,479 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 483 transitions. [2020-12-22 04:34:31,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-22 04:34:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 483 transitions. [2020-12-22 04:34:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 04:34:31,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:31,480 INFO L422 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:31,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-22 04:34:31,681 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:31,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1323998934, now seen corresponding path program 79 times [2020-12-22 04:34:31,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:31,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927400865] [2020-12-22 04:34:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:36,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927400865] [2020-12-22 04:34:36,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590159512] [2020-12-22 04:34:36,267 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:36,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 04:34:36,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:36,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:36,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 85 [2020-12-22 04:34:36,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412589638] [2020-12-22 04:34:36,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-22 04:34:36,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:36,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-22 04:34:36,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3408, Invalid=3732, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 04:34:36,734 INFO L87 Difference]: Start difference. First operand 404 states and 483 transitions. Second operand 85 states. [2020-12-22 04:34:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:38,418 INFO L93 Difference]: Finished difference Result 420 states and 501 transitions. [2020-12-22 04:34:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-22 04:34:38,418 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 169 [2020-12-22 04:34:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:38,421 INFO L225 Difference]: With dead ends: 420 [2020-12-22 04:34:38,421 INFO L226 Difference]: Without dead ends: 416 [2020-12-22 04:34:38,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3413, Invalid=3897, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 04:34:38,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-12-22 04:34:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 409. [2020-12-22 04:34:38,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-12-22 04:34:38,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 489 transitions. [2020-12-22 04:34:38,427 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 489 transitions. Word has length 169 [2020-12-22 04:34:38,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:38,427 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 489 transitions. [2020-12-22 04:34:38,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-22 04:34:38,428 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 489 transitions. [2020-12-22 04:34:38,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 04:34:38,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:38,429 INFO L422 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:38,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:38,641 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:38,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1007794107, now seen corresponding path program 80 times [2020-12-22 04:34:38,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:38,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444458722] [2020-12-22 04:34:38,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:43,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444458722] [2020-12-22 04:34:43,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359448573] [2020-12-22 04:34:43,409 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:43,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:34:43,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:43,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-22 04:34:43,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:43,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:43,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 86 [2020-12-22 04:34:43,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764609400] [2020-12-22 04:34:43,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-22 04:34:43,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:43,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-22 04:34:43,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3491, Invalid=3819, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 04:34:43,858 INFO L87 Difference]: Start difference. First operand 409 states and 489 transitions. Second operand 86 states. [2020-12-22 04:34:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:45,560 INFO L93 Difference]: Finished difference Result 425 states and 507 transitions. [2020-12-22 04:34:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-22 04:34:45,561 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 171 [2020-12-22 04:34:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:45,563 INFO L225 Difference]: With dead ends: 425 [2020-12-22 04:34:45,563 INFO L226 Difference]: Without dead ends: 421 [2020-12-22 04:34:45,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3496, Invalid=3986, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 04:34:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-12-22 04:34:45,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 414. [2020-12-22 04:34:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-12-22 04:34:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 495 transitions. [2020-12-22 04:34:45,567 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 495 transitions. Word has length 171 [2020-12-22 04:34:45,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:45,567 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 495 transitions. [2020-12-22 04:34:45,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-22 04:34:45,567 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 495 transitions. [2020-12-22 04:34:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 04:34:45,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:45,568 INFO L422 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:45,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:45,769 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:45,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:45,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2077633376, now seen corresponding path program 81 times [2020-12-22 04:34:45,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:45,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417423856] [2020-12-22 04:34:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:50,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417423856] [2020-12-22 04:34:50,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078376566] [2020-12-22 04:34:50,703 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:50,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2020-12-22 04:34:50,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:50,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-22 04:34:50,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:51,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:51,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 87 [2020-12-22 04:34:51,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418332458] [2020-12-22 04:34:51,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-22 04:34:51,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:51,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-22 04:34:51,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3575, Invalid=3907, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 04:34:51,259 INFO L87 Difference]: Start difference. First operand 414 states and 495 transitions. Second operand 87 states. [2020-12-22 04:34:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:52,931 INFO L93 Difference]: Finished difference Result 430 states and 513 transitions. [2020-12-22 04:34:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-22 04:34:52,932 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 173 [2020-12-22 04:34:52,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:52,934 INFO L225 Difference]: With dead ends: 430 [2020-12-22 04:34:52,934 INFO L226 Difference]: Without dead ends: 426 [2020-12-22 04:34:52,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3580, Invalid=4076, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 04:34:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-12-22 04:34:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 419. [2020-12-22 04:34:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-12-22 04:34:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 501 transitions. [2020-12-22 04:34:52,939 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 501 transitions. Word has length 173 [2020-12-22 04:34:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:52,939 INFO L481 AbstractCegarLoop]: Abstraction has 419 states and 501 transitions. [2020-12-22 04:34:52,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-22 04:34:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 501 transitions. [2020-12-22 04:34:52,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-22 04:34:52,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:52,941 INFO L422 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:53,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:53,141 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:53,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:53,142 INFO L82 PathProgramCache]: Analyzing trace with hash 598980155, now seen corresponding path program 82 times [2020-12-22 04:34:53,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:53,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008012483] [2020-12-22 04:34:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:58,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008012483] [2020-12-22 04:34:58,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994405022] [2020-12-22 04:34:58,146 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:58,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:34:58,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:58,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-22 04:34:58,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:58,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:58,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 88 [2020-12-22 04:34:58,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008074681] [2020-12-22 04:34:58,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-22 04:34:58,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:58,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-22 04:34:58,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3660, Invalid=3996, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 04:34:58,604 INFO L87 Difference]: Start difference. First operand 419 states and 501 transitions. Second operand 88 states. [2020-12-22 04:34:59,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:59,949 INFO L93 Difference]: Finished difference Result 435 states and 519 transitions. [2020-12-22 04:34:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-22 04:34:59,950 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 175 [2020-12-22 04:34:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:59,953 INFO L225 Difference]: With dead ends: 435 [2020-12-22 04:34:59,953 INFO L226 Difference]: Without dead ends: 431 [2020-12-22 04:34:59,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3665, Invalid=4167, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 04:34:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-12-22 04:34:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 424. [2020-12-22 04:34:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-12-22 04:34:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 507 transitions. [2020-12-22 04:34:59,958 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 507 transitions. Word has length 175 [2020-12-22 04:34:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:59,958 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 507 transitions. [2020-12-22 04:34:59,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-22 04:34:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 507 transitions. [2020-12-22 04:34:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-22 04:34:59,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:59,959 INFO L422 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:00,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:00,160 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash 139173142, now seen corresponding path program 83 times [2020-12-22 04:35:00,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:00,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895071478] [2020-12-22 04:35:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:05,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895071478] [2020-12-22 04:35:05,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176941325] [2020-12-22 04:35:05,384 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:05,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2020-12-22 04:35:05,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:05,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-22 04:35:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:05,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:05,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 89 [2020-12-22 04:35:05,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653613898] [2020-12-22 04:35:05,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-12-22 04:35:05,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:05,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-12-22 04:35:05,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3746, Invalid=4086, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 04:35:05,946 INFO L87 Difference]: Start difference. First operand 424 states and 507 transitions. Second operand 89 states. [2020-12-22 04:35:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:07,888 INFO L93 Difference]: Finished difference Result 440 states and 525 transitions. [2020-12-22 04:35:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-22 04:35:07,889 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 177 [2020-12-22 04:35:07,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:07,892 INFO L225 Difference]: With dead ends: 440 [2020-12-22 04:35:07,892 INFO L226 Difference]: Without dead ends: 436 [2020-12-22 04:35:07,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3751, Invalid=4259, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 04:35:07,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-12-22 04:35:07,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 429. [2020-12-22 04:35:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-12-22 04:35:07,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 513 transitions. [2020-12-22 04:35:07,899 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 513 transitions. Word has length 177 [2020-12-22 04:35:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:07,899 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 513 transitions. [2020-12-22 04:35:07,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-12-22 04:35:07,899 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 513 transitions. [2020-12-22 04:35:07,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-12-22 04:35:07,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:07,900 INFO L422 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:08,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:08,114 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:08,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:08,115 INFO L82 PathProgramCache]: Analyzing trace with hash 646265137, now seen corresponding path program 84 times [2020-12-22 04:35:08,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:08,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796751419] [2020-12-22 04:35:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat