/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:44:29,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:44:29,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:44:29,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:44:29,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:44:29,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:44:29,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:44:29,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:44:29,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:44:29,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:44:29,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:44:29,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:44:29,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:44:29,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:44:29,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:44:29,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:44:29,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:44:29,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:44:29,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:44:29,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:44:29,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:44:29,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:44:29,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:44:29,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:44:29,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:44:29,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:44:29,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:44:29,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:44:29,290 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 21:44:29,305 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:44:29,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:44:29,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:44:29,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:44:29,307 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:44:29,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:44:29,307 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:44:29,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:44:29,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:44:29,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:44:29,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:44:29,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:44:29,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:44:29,309 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:44:29,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:44:29,309 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:44:29,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:44:29,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:44:29,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:44:29,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:44:29,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:44:29,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:44:29,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:44:29,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:44:29,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:44:29,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:44:29,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:44:29,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:44:29,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:44:29,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:44:29,591 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:44:29,611 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:44:29,614 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:44:29,616 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:44:29,616 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:44:29,617 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-07-19 21:44:29,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58d8a5fb8/9d8596f3a1584cc58bae082555074f59/FLAGd7c7b1eda [2020-07-19 21:44:30,202 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:44:30,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-07-19 21:44:30,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58d8a5fb8/9d8596f3a1584cc58bae082555074f59/FLAGd7c7b1eda [2020-07-19 21:44:30,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58d8a5fb8/9d8596f3a1584cc58bae082555074f59 [2020-07-19 21:44:30,640 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:44:30,643 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:44:30,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:44:30,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:44:30,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:44:30,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:30" (1/1) ... [2020-07-19 21:44:30,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a1d5e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:30, skipping insertion in model container [2020-07-19 21:44:30,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:30" (1/1) ... [2020-07-19 21:44:30,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:44:30,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:44:30,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:44:30,873 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:44:30,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:44:30,903 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:44:30,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:30 WrapperNode [2020-07-19 21:44:30,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:44:30,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:44:30,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:44:30,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:44:30,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:30" (1/1) ... [2020-07-19 21:44:30,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:30" (1/1) ... [2020-07-19 21:44:30,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:30" (1/1) ... [2020-07-19 21:44:30,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:30" (1/1) ... [2020-07-19 21:44:31,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:30" (1/1) ... [2020-07-19 21:44:31,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:30" (1/1) ... [2020-07-19 21:44:31,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:30" (1/1) ... [2020-07-19 21:44:31,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:44:31,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:44:31,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:44:31,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:44:31,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:30" (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 [2020-07-19 21:44:31,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:44:31,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:44:31,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:44:31,104 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-07-19 21:44:31,105 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:44:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-19 21:44:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:44:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:44:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-19 21:44:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-19 21:44:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-19 21:44:31,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:44:31,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 21:44:31,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-19 21:44:31,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 21:44:31,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:44:31,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:44:31,395 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:44:31,395 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-19 21:44:31,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:31 BoogieIcfgContainer [2020-07-19 21:44:31,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:44:31,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:44:31,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:44:31,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:44:31,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:44:30" (1/3) ... [2020-07-19 21:44:31,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294ef445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:31, skipping insertion in model container [2020-07-19 21:44:31,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:30" (2/3) ... [2020-07-19 21:44:31,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294ef445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:31, skipping insertion in model container [2020-07-19 21:44:31,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:31" (3/3) ... [2020-07-19 21:44:31,409 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-07-19 21:44:31,420 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:44:31,428 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:44:31,443 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:44:31,467 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:44:31,467 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:44:31,467 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:44:31,468 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:44:31,468 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:44:31,468 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:44:31,468 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:44:31,468 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:44:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-19 21:44:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 21:44:31,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:31,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:31,490 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:31,495 INFO L82 PathProgramCache]: Analyzing trace with hash -850547107, now seen corresponding path program 1 times [2020-07-19 21:44:31,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:31,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527803867] [2020-07-19 21:44:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:31,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527803867] [2020-07-19 21:44:31,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:44:31,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 21:44:31,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946399483] [2020-07-19 21:44:31,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 21:44:31,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:31,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 21:44:31,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:44:31,739 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-07-19 21:44:31,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:31,896 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-07-19 21:44:31,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:44:31,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-19 21:44:31,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:31,910 INFO L225 Difference]: With dead ends: 59 [2020-07-19 21:44:31,910 INFO L226 Difference]: Without dead ends: 31 [2020-07-19 21:44:31,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:44:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-19 21:44:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-07-19 21:44:31,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-19 21:44:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-19 21:44:31,961 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-07-19 21:44:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:31,962 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-19 21:44:31,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 21:44:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-19 21:44:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 21:44:31,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:31,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:31,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:44:31,964 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:31,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:31,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1453375688, now seen corresponding path program 1 times [2020-07-19 21:44:31,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:31,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784660455] [2020-07-19 21:44:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:32,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784660455] [2020-07-19 21:44:32,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:44:32,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 21:44:32,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563059818] [2020-07-19 21:44:32,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:44:32,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:32,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:44:32,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:44:32,184 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-07-19 21:44:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:32,387 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-19 21:44:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:44:32,388 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-19 21:44:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:32,389 INFO L225 Difference]: With dead ends: 48 [2020-07-19 21:44:32,389 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 21:44:32,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:44:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 21:44:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-19 21:44:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 21:44:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-19 21:44:32,400 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-07-19 21:44:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:32,400 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-19 21:44:32,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:44:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-19 21:44:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:44:32,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:32,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:32,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:44:32,403 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:32,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:32,404 INFO L82 PathProgramCache]: Analyzing trace with hash -169907062, now seen corresponding path program 1 times [2020-07-19 21:44:32,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:32,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17054016] [2020-07-19 21:44:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:32,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17054016] [2020-07-19 21:44:32,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345216460] [2020-07-19 21:44:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-19 21:44:32,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:44:32,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:44:32,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2020-07-19 21:44:32,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622671442] [2020-07-19 21:44:32,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:44:32,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:32,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:44:32,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:44:32,768 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2020-07-19 21:44:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:32,809 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-07-19 21:44:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:44:32,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-19 21:44:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:32,814 INFO L225 Difference]: With dead ends: 49 [2020-07-19 21:44:32,814 INFO L226 Difference]: Without dead ends: 37 [2020-07-19 21:44:32,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:44:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-19 21:44:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-07-19 21:44:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 21:44:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-19 21:44:32,841 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-07-19 21:44:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:32,841 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-19 21:44:32,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:44:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-19 21:44:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 21:44:32,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:32,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:33,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 21:44:33,049 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash -203072550, now seen corresponding path program 1 times [2020-07-19 21:44:33,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:33,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719794093] [2020-07-19 21:44:33,051 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:44:33,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719794093] [2020-07-19 21:44:33,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666886355] [2020-07-19 21:44:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-19 21:44:33,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:44:33,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:44:33,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-19 21:44:33,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324828895] [2020-07-19 21:44:33,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:44:33,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:33,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:44:33,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:44:33,212 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 3 states. [2020-07-19 21:44:33,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:33,224 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-19 21:44:33,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:44:33,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-19 21:44:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:33,226 INFO L225 Difference]: With dead ends: 48 [2020-07-19 21:44:33,226 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 21:44:33,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:44:33,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 21:44:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 21:44:33,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 21:44:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-19 21:44:33,233 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-07-19 21:44:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:33,233 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-19 21:44:33,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:44:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-19 21:44:33,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 21:44:33,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:33,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:33,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:33,440 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash -596099560, now seen corresponding path program 1 times [2020-07-19 21:44:33,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:33,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327623789] [2020-07-19 21:44:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:44:33,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327623789] [2020-07-19 21:44:33,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765977262] [2020-07-19 21:44:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 21:44:33,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:44:33,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:33,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-07-19 21:44:33,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835883867] [2020-07-19 21:44:33,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:44:33,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:44:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:44:33,635 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2020-07-19 21:44:33,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:33,837 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-07-19 21:44:33,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:44:33,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-19 21:44:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:33,839 INFO L225 Difference]: With dead ends: 67 [2020-07-19 21:44:33,839 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 21:44:33,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:44:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 21:44:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2020-07-19 21:44:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 21:44:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-07-19 21:44:33,848 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 25 [2020-07-19 21:44:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:33,848 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-07-19 21:44:33,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:44:33,849 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-07-19 21:44:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-19 21:44:33,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:33,850 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:34,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:34,064 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1096950668, now seen corresponding path program 2 times [2020-07-19 21:44:34,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:34,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081818603] [2020-07-19 21:44:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:34,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081818603] [2020-07-19 21:44:34,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141968672] [2020-07-19 21:44:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:44:34,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:34,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:34,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-07-19 21:44:34,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878635458] [2020-07-19 21:44:34,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 21:44:34,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:34,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 21:44:34,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:44:34,401 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 12 states. [2020-07-19 21:44:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:34,724 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-07-19 21:44:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:44:34,724 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-07-19 21:44:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:34,725 INFO L225 Difference]: With dead ends: 60 [2020-07-19 21:44:34,725 INFO L226 Difference]: Without dead ends: 38 [2020-07-19 21:44:34,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:44:34,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-19 21:44:34,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-07-19 21:44:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-19 21:44:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-07-19 21:44:34,732 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2020-07-19 21:44:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:34,732 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-07-19 21:44:34,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 21:44:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-07-19 21:44:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-19 21:44:34,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:34,734 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:34,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:34,946 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:34,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:34,946 INFO L82 PathProgramCache]: Analyzing trace with hash 64390350, now seen corresponding path program 3 times [2020-07-19 21:44:34,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:34,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144440999] [2020-07-19 21:44:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:35,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144440999] [2020-07-19 21:44:35,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485569672] [2020-07-19 21:44:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:44:35,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:35,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:35,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-07-19 21:44:35,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287138201] [2020-07-19 21:44:35,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:44:35,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:35,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:44:35,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:44:35,278 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 14 states. [2020-07-19 21:44:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:35,667 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-07-19 21:44:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:44:35,668 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-07-19 21:44:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:35,668 INFO L225 Difference]: With dead ends: 62 [2020-07-19 21:44:35,669 INFO L226 Difference]: Without dead ends: 40 [2020-07-19 21:44:35,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:44:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-19 21:44:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-19 21:44:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 21:44:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-07-19 21:44:35,684 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2020-07-19 21:44:35,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:35,684 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-07-19 21:44:35,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:44:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-07-19 21:44:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-19 21:44:35,686 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:35,686 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:35,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 21:44:35,887 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:35,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:35,888 INFO L82 PathProgramCache]: Analyzing trace with hash -88629872, now seen corresponding path program 4 times [2020-07-19 21:44:35,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:35,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204137296] [2020-07-19 21:44:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:36,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204137296] [2020-07-19 21:44:36,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124526676] [2020-07-19 21:44:36,126 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:44:36,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:36,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:36,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2020-07-19 21:44:36,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808025788] [2020-07-19 21:44:36,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:44:36,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:36,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:44:36,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:44:36,298 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 16 states. [2020-07-19 21:44:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:36,709 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-07-19 21:44:36,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:44:36,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-07-19 21:44:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:36,712 INFO L225 Difference]: With dead ends: 64 [2020-07-19 21:44:36,712 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 21:44:36,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:44:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 21:44:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-19 21:44:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-19 21:44:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-07-19 21:44:36,719 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2020-07-19 21:44:36,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:36,719 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-07-19 21:44:36,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:44:36,719 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-07-19 21:44:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-19 21:44:36,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:36,721 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:36,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:36,930 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:36,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:36,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1112175150, now seen corresponding path program 5 times [2020-07-19 21:44:36,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:36,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252531117] [2020-07-19 21:44:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:37,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252531117] [2020-07-19 21:44:37,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949143190] [2020-07-19 21:44:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 21:44:37,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:37,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:37,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-07-19 21:44:37,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142003100] [2020-07-19 21:44:37,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 21:44:37,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:37,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 21:44:37,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:44:37,409 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 18 states. [2020-07-19 21:44:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:37,908 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-07-19 21:44:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:44:37,909 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-07-19 21:44:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:37,910 INFO L225 Difference]: With dead ends: 66 [2020-07-19 21:44:37,910 INFO L226 Difference]: Without dead ends: 44 [2020-07-19 21:44:37,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:44:37,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-19 21:44:37,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-19 21:44:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-19 21:44:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-07-19 21:44:37,917 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2020-07-19 21:44:37,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:37,918 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-07-19 21:44:37,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 21:44:37,918 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-07-19 21:44:37,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-19 21:44:37,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:37,919 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:38,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:38,122 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:38,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:38,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1191676524, now seen corresponding path program 6 times [2020-07-19 21:44:38,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:38,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914179146] [2020-07-19 21:44:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:38,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914179146] [2020-07-19 21:44:38,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029164600] [2020-07-19 21:44:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:44:38,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:38,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:38,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2020-07-19 21:44:38,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751633599] [2020-07-19 21:44:38,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 21:44:38,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:38,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 21:44:38,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:44:38,767 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 20 states. [2020-07-19 21:44:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:39,229 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-07-19 21:44:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:44:39,229 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-07-19 21:44:39,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:39,230 INFO L225 Difference]: With dead ends: 68 [2020-07-19 21:44:39,230 INFO L226 Difference]: Without dead ends: 46 [2020-07-19 21:44:39,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:44:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-19 21:44:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-19 21:44:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 21:44:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-07-19 21:44:39,237 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38 [2020-07-19 21:44:39,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:39,237 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-07-19 21:44:39,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 21:44:39,237 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-07-19 21:44:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 21:44:39,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:39,238 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:39,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 21:44:39,450 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:39,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:39,451 INFO L82 PathProgramCache]: Analyzing trace with hash -283085610, now seen corresponding path program 7 times [2020-07-19 21:44:39,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:39,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113926218] [2020-07-19 21:44:39,452 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:39,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113926218] [2020-07-19 21:44:39,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512272996] [2020-07-19 21:44:39,792 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:39,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 21:44:39,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:40,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:40,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2020-07-19 21:44:40,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132501654] [2020-07-19 21:44:40,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 21:44:40,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:40,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 21:44:40,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:44:40,019 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 22 states. [2020-07-19 21:44:40,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:40,606 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-07-19 21:44:40,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:44:40,607 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2020-07-19 21:44:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:40,608 INFO L225 Difference]: With dead ends: 70 [2020-07-19 21:44:40,608 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 21:44:40,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 21:44:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 21:44:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-07-19 21:44:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-19 21:44:40,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-07-19 21:44:40,615 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2020-07-19 21:44:40,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:40,616 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-07-19 21:44:40,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 21:44:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-07-19 21:44:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-19 21:44:40,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:40,617 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:40,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:40,819 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:40,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:40,828 INFO L82 PathProgramCache]: Analyzing trace with hash 994421656, now seen corresponding path program 8 times [2020-07-19 21:44:40,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:40,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116889025] [2020-07-19 21:44:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:41,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116889025] [2020-07-19 21:44:41,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157197644] [2020-07-19 21:44:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:41,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 21:44:41,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:41,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:41,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-07-19 21:44:41,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963014557] [2020-07-19 21:44:41,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 21:44:41,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:41,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 21:44:41,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:44:41,571 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 24 states. [2020-07-19 21:44:42,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:42,228 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-07-19 21:44:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:44:42,229 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2020-07-19 21:44:42,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:42,230 INFO L225 Difference]: With dead ends: 72 [2020-07-19 21:44:42,230 INFO L226 Difference]: Without dead ends: 50 [2020-07-19 21:44:42,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 21:44:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-19 21:44:42,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-19 21:44:42,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-19 21:44:42,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-07-19 21:44:42,239 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 42 [2020-07-19 21:44:42,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:42,239 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-07-19 21:44:42,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 21:44:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-07-19 21:44:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-19 21:44:42,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:42,243 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:42,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:42,444 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:42,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:42,445 INFO L82 PathProgramCache]: Analyzing trace with hash 318257626, now seen corresponding path program 9 times [2020-07-19 21:44:42,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:42,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530743006] [2020-07-19 21:44:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:42,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530743006] [2020-07-19 21:44:42,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489540063] [2020-07-19 21:44:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 21:44:42,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:43,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:43,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2020-07-19 21:44:43,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698133143] [2020-07-19 21:44:43,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 21:44:43,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:43,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 21:44:43,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:44:43,195 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 26 states. [2020-07-19 21:44:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:43,871 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-07-19 21:44:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:44:43,872 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2020-07-19 21:44:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:43,873 INFO L225 Difference]: With dead ends: 74 [2020-07-19 21:44:43,874 INFO L226 Difference]: Without dead ends: 52 [2020-07-19 21:44:43,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 21:44:43,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-19 21:44:43,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-07-19 21:44:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 21:44:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-07-19 21:44:43,881 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2020-07-19 21:44:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:43,881 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-07-19 21:44:43,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 21:44:43,882 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-07-19 21:44:43,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-19 21:44:43,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:43,883 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:44,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 21:44:44,096 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:44,097 INFO L82 PathProgramCache]: Analyzing trace with hash -935313508, now seen corresponding path program 10 times [2020-07-19 21:44:44,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:44,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585635688] [2020-07-19 21:44:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:44,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585635688] [2020-07-19 21:44:44,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438052571] [2020-07-19 21:44:44,586 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:44,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 21:44:44,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:44,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:44,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-07-19 21:44:44,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408971170] [2020-07-19 21:44:44,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-19 21:44:44,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:44,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-19 21:44:44,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2020-07-19 21:44:44,984 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 28 states. [2020-07-19 21:44:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:45,708 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-07-19 21:44:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:44:45,709 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2020-07-19 21:44:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:45,710 INFO L225 Difference]: With dead ends: 76 [2020-07-19 21:44:45,711 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 21:44:45,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 21:44:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 21:44:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-07-19 21:44:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-19 21:44:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-07-19 21:44:45,717 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2020-07-19 21:44:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:45,717 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-07-19 21:44:45,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-19 21:44:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-07-19 21:44:45,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-19 21:44:45,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:45,719 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:45,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 21:44:45,933 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:45,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1268636894, now seen corresponding path program 11 times [2020-07-19 21:44:45,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:45,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296752941] [2020-07-19 21:44:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:46,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296752941] [2020-07-19 21:44:46,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31295011] [2020-07-19 21:44:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:46,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-19 21:44:46,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:46,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:46,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2020-07-19 21:44:46,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172819129] [2020-07-19 21:44:46,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-19 21:44:46,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:46,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-19 21:44:46,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:44:46,855 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 30 states. [2020-07-19 21:44:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:47,757 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-07-19 21:44:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 21:44:47,757 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 48 [2020-07-19 21:44:47,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:47,758 INFO L225 Difference]: With dead ends: 78 [2020-07-19 21:44:47,759 INFO L226 Difference]: Without dead ends: 56 [2020-07-19 21:44:47,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=499, Invalid=1481, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 21:44:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-19 21:44:47,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-19 21:44:47,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-19 21:44:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-07-19 21:44:47,765 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-07-19 21:44:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:47,765 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-07-19 21:44:47,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-19 21:44:47,766 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-07-19 21:44:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-19 21:44:47,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:47,767 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:47,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 21:44:47,979 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:47,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:47,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1846096288, now seen corresponding path program 12 times [2020-07-19 21:44:47,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:47,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159450851] [2020-07-19 21:44:47,981 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:48,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159450851] [2020-07-19 21:44:48,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487942649] [2020-07-19 21:44:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:48,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 21:44:48,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:49,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:49,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2020-07-19 21:44:49,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304083848] [2020-07-19 21:44:49,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-19 21:44:49,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:49,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-19 21:44:49,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2020-07-19 21:44:49,014 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 32 states. [2020-07-19 21:44:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:49,897 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-07-19 21:44:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 21:44:49,897 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2020-07-19 21:44:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:49,898 INFO L225 Difference]: With dead ends: 80 [2020-07-19 21:44:49,899 INFO L226 Difference]: Without dead ends: 58 [2020-07-19 21:44:49,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2020-07-19 21:44:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-19 21:44:49,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-07-19 21:44:49,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 21:44:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-07-19 21:44:49,905 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-07-19 21:44:49,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:49,906 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-07-19 21:44:49,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-19 21:44:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-07-19 21:44:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-19 21:44:49,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:49,907 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:50,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:50,113 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:50,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:50,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1561174558, now seen corresponding path program 13 times [2020-07-19 21:44:50,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:50,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043474931] [2020-07-19 21:44:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:50,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043474931] [2020-07-19 21:44:50,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883013005] [2020-07-19 21:44:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:50,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-19 21:44:50,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:51,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:51,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2020-07-19 21:44:51,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685917607] [2020-07-19 21:44:51,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-19 21:44:51,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:51,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-19 21:44:51,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=874, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 21:44:51,218 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 34 states. [2020-07-19 21:44:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:52,206 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-07-19 21:44:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 21:44:52,206 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 52 [2020-07-19 21:44:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:52,208 INFO L225 Difference]: With dead ends: 82 [2020-07-19 21:44:52,208 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 21:44:52,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=648, Invalid=1902, Unknown=0, NotChecked=0, Total=2550 [2020-07-19 21:44:52,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 21:44:52,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-07-19 21:44:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-19 21:44:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-07-19 21:44:52,216 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-07-19 21:44:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:52,216 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-07-19 21:44:52,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-19 21:44:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-07-19 21:44:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-19 21:44:52,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:52,217 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:52,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-19 21:44:52,430 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:52,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1111589284, now seen corresponding path program 14 times [2020-07-19 21:44:52,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:52,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559958478] [2020-07-19 21:44:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:53,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559958478] [2020-07-19 21:44:53,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491278173] [2020-07-19 21:44:53,159 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:53,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 21:44:53,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:53,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:53,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2020-07-19 21:44:53,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833665905] [2020-07-19 21:44:53,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-19 21:44:53,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:53,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-19 21:44:53,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 21:44:53,740 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 36 states. [2020-07-19 21:44:54,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:54,792 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-07-19 21:44:54,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 21:44:54,793 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 54 [2020-07-19 21:44:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:54,794 INFO L225 Difference]: With dead ends: 84 [2020-07-19 21:44:54,794 INFO L226 Difference]: Without dead ends: 62 [2020-07-19 21:44:54,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-07-19 21:44:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-19 21:44:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-07-19 21:44:54,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-19 21:44:54,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-07-19 21:44:54,799 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-07-19 21:44:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:54,799 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-07-19 21:44:54,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-19 21:44:54,800 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-07-19 21:44:54,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-19 21:44:54,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:54,800 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:55,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 21:44:55,013 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:55,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1247198438, now seen corresponding path program 15 times [2020-07-19 21:44:55,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:55,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952122868] [2020-07-19 21:44:55,014 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:55,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952122868] [2020-07-19 21:44:55,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410509812] [2020-07-19 21:44:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:55,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 21:44:55,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:56,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:56,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2020-07-19 21:44:56,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312007406] [2020-07-19 21:44:56,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-19 21:44:56,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-19 21:44:56,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1092, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 21:44:56,412 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 38 states. [2020-07-19 21:44:57,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:57,587 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-07-19 21:44:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 21:44:57,588 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 56 [2020-07-19 21:44:57,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:57,589 INFO L225 Difference]: With dead ends: 86 [2020-07-19 21:44:57,589 INFO L226 Difference]: Without dead ends: 64 [2020-07-19 21:44:57,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-07-19 21:44:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-19 21:44:57,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-07-19 21:44:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-19 21:44:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-07-19 21:44:57,595 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-07-19 21:44:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:57,595 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-07-19 21:44:57,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-19 21:44:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-07-19 21:44:57,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-19 21:44:57,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:57,596 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:57,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:57,797 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:57,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:57,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1576390744, now seen corresponding path program 16 times [2020-07-19 21:44:57,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:57,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029576386] [2020-07-19 21:44:57,799 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:44:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:58,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029576386] [2020-07-19 21:44:58,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921270130] [2020-07-19 21:44:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:44:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:58,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 21:44:58,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:59,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:59,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 40 [2020-07-19 21:44:59,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555270706] [2020-07-19 21:44:59,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-19 21:44:59,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:59,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-19 21:44:59,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1210, Unknown=0, NotChecked=0, Total=1560 [2020-07-19 21:44:59,511 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 40 states. [2020-07-19 21:45:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:00,740 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-07-19 21:45:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 21:45:00,741 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 58 [2020-07-19 21:45:00,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:00,742 INFO L225 Difference]: With dead ends: 88 [2020-07-19 21:45:00,742 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 21:45:00,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=909, Invalid=2631, Unknown=0, NotChecked=0, Total=3540 [2020-07-19 21:45:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 21:45:00,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-07-19 21:45:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-19 21:45:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-07-19 21:45:00,751 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2020-07-19 21:45:00,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:00,751 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-07-19 21:45:00,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-19 21:45:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-07-19 21:45:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-19 21:45:00,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:00,752 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:00,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:00,956 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:00,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:00,957 INFO L82 PathProgramCache]: Analyzing trace with hash -626263574, now seen corresponding path program 17 times [2020-07-19 21:45:00,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:00,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571933639] [2020-07-19 21:45:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:45:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:01,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571933639] [2020-07-19 21:45:01,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102766901] [2020-07-19 21:45:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:45:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:01,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 21:45:01,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:02,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:02,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2020-07-19 21:45:02,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973382706] [2020-07-19 21:45:02,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-19 21:45:02,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:02,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-19 21:45:02,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1334, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 21:45:02,621 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 42 states. [2020-07-19 21:45:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:03,984 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-07-19 21:45:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 21:45:03,985 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 60 [2020-07-19 21:45:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:03,986 INFO L225 Difference]: With dead ends: 90 [2020-07-19 21:45:03,986 INFO L226 Difference]: Without dead ends: 68 [2020-07-19 21:45:03,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-07-19 21:45:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-19 21:45:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-07-19 21:45:03,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-19 21:45:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-07-19 21:45:03,991 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-07-19 21:45:03,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:03,992 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-07-19 21:45:03,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-19 21:45:03,992 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-07-19 21:45:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-19 21:45:03,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:03,993 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:04,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:04,205 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:04,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1912880044, now seen corresponding path program 18 times [2020-07-19 21:45:04,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:04,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28491211] [2020-07-19 21:45:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:45:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:05,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28491211] [2020-07-19 21:45:05,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235767864] [2020-07-19 21:45:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:45:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:05,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 21:45:05,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:06,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:06,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 44 [2020-07-19 21:45:06,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264905525] [2020-07-19 21:45:06,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-19 21:45:06,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:06,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-19 21:45:06,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1464, Unknown=0, NotChecked=0, Total=1892 [2020-07-19 21:45:06,044 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 44 states. [2020-07-19 21:45:07,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:07,521 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-07-19 21:45:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 21:45:07,522 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 62 [2020-07-19 21:45:07,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:07,523 INFO L225 Difference]: With dead ends: 92 [2020-07-19 21:45:07,523 INFO L226 Difference]: Without dead ends: 70 [2020-07-19 21:45:07,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1108, Invalid=3182, Unknown=0, NotChecked=0, Total=4290 [2020-07-19 21:45:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-19 21:45:07,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-07-19 21:45:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-19 21:45:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-07-19 21:45:07,529 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2020-07-19 21:45:07,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:07,529 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-07-19 21:45:07,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-19 21:45:07,529 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-07-19 21:45:07,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-19 21:45:07,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:07,530 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:07,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-19 21:45:07,732 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:07,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1806494482, now seen corresponding path program 19 times [2020-07-19 21:45:07,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:07,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236707114] [2020-07-19 21:45:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:45:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:08,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236707114] [2020-07-19 21:45:08,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11707395] [2020-07-19 21:45:08,779 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:45:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:08,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-19 21:45:08,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:09,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:09,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 46 [2020-07-19 21:45:09,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82075393] [2020-07-19 21:45:09,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-19 21:45:09,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:09,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-19 21:45:09,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2020-07-19 21:45:09,726 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 46 states. [2020-07-19 21:45:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:11,226 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-07-19 21:45:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 21:45:11,227 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2020-07-19 21:45:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:11,228 INFO L225 Difference]: With dead ends: 94 [2020-07-19 21:45:11,228 INFO L226 Difference]: Without dead ends: 72 [2020-07-19 21:45:11,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1215, Invalid=3477, Unknown=0, NotChecked=0, Total=4692 [2020-07-19 21:45:11,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-19 21:45:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-07-19 21:45:11,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-19 21:45:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-07-19 21:45:11,234 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-07-19 21:45:11,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:11,234 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-07-19 21:45:11,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-19 21:45:11,234 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-07-19 21:45:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-19 21:45:11,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:11,235 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:11,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-19 21:45:11,447 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1582343600, now seen corresponding path program 20 times [2020-07-19 21:45:11,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:11,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956729160] [2020-07-19 21:45:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:45:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:12,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956729160] [2020-07-19 21:45:12,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575304518] [2020-07-19 21:45:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:45:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:12,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 21:45:12,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:13,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:13,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 48 [2020-07-19 21:45:13,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240077323] [2020-07-19 21:45:13,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-19 21:45:13,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:13,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-19 21:45:13,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=1742, Unknown=0, NotChecked=0, Total=2256 [2020-07-19 21:45:13,580 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 48 states. [2020-07-19 21:45:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:15,243 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-07-19 21:45:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 21:45:15,244 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2020-07-19 21:45:15,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:15,245 INFO L225 Difference]: With dead ends: 96 [2020-07-19 21:45:15,245 INFO L226 Difference]: Without dead ends: 74 [2020-07-19 21:45:15,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1327, Invalid=3785, Unknown=0, NotChecked=0, Total=5112 [2020-07-19 21:45:15,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-19 21:45:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-07-19 21:45:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-19 21:45:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-07-19 21:45:15,251 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-07-19 21:45:15,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:15,252 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-07-19 21:45:15,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-19 21:45:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-07-19 21:45:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-19 21:45:15,252 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:15,253 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:15,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:15,460 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:15,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:15,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1624437262, now seen corresponding path program 21 times [2020-07-19 21:45:15,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:15,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470352146] [2020-07-19 21:45:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:45:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:16,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470352146] [2020-07-19 21:45:16,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142739301] [2020-07-19 21:45:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:45:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:16,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-19 21:45:16,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:17,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:17,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 50 [2020-07-19 21:45:17,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662733210] [2020-07-19 21:45:17,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-19 21:45:17,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:17,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-19 21:45:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=1890, Unknown=0, NotChecked=0, Total=2450 [2020-07-19 21:45:17,920 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 50 states. [2020-07-19 21:45:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:19,608 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-07-19 21:45:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 21:45:19,609 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 68 [2020-07-19 21:45:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:19,609 INFO L225 Difference]: With dead ends: 98 [2020-07-19 21:45:19,610 INFO L226 Difference]: Without dead ends: 76 [2020-07-19 21:45:19,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1444, Invalid=4106, Unknown=0, NotChecked=0, Total=5550 [2020-07-19 21:45:19,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-19 21:45:19,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-07-19 21:45:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-19 21:45:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-07-19 21:45:19,615 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-07-19 21:45:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:19,615 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-07-19 21:45:19,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-19 21:45:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-07-19 21:45:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-19 21:45:19,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:19,616 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:19,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-07-19 21:45:19,826 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:19,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:19,827 INFO L82 PathProgramCache]: Analyzing trace with hash 445672884, now seen corresponding path program 22 times [2020-07-19 21:45:19,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:19,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818309564] [2020-07-19 21:45:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:45:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:21,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818309564] [2020-07-19 21:45:21,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094773408] [2020-07-19 21:45:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:45:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:21,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 21:45:21,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:22,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:22,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 52 [2020-07-19 21:45:22,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142311562] [2020-07-19 21:45:22,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-19 21:45:22,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:22,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-19 21:45:22,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=2044, Unknown=0, NotChecked=0, Total=2652 [2020-07-19 21:45:22,288 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 52 states. [2020-07-19 21:45:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:24,173 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-07-19 21:45:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-19 21:45:24,173 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 70 [2020-07-19 21:45:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:24,175 INFO L225 Difference]: With dead ends: 100 [2020-07-19 21:45:24,175 INFO L226 Difference]: Without dead ends: 78 [2020-07-19 21:45:24,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1566, Invalid=4440, Unknown=0, NotChecked=0, Total=6006 [2020-07-19 21:45:24,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-19 21:45:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-07-19 21:45:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-19 21:45:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-07-19 21:45:24,180 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-07-19 21:45:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:24,181 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-07-19 21:45:24,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-19 21:45:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-07-19 21:45:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-19 21:45:24,182 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:24,182 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:24,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:24,391 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:24,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:24,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1251665142, now seen corresponding path program 23 times [2020-07-19 21:45:24,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:24,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489276796] [2020-07-19 21:45:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:45:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:25,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489276796] [2020-07-19 21:45:25,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909982018] [2020-07-19 21:45:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:45:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:25,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-19 21:45:25,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:27,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:27,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 54 [2020-07-19 21:45:27,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664769266] [2020-07-19 21:45:27,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-19 21:45:27,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:27,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-19 21:45:27,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2020-07-19 21:45:27,179 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 54 states. [2020-07-19 21:45:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:29,161 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-07-19 21:45:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-19 21:45:29,162 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 72 [2020-07-19 21:45:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:29,163 INFO L225 Difference]: With dead ends: 102 [2020-07-19 21:45:29,163 INFO L226 Difference]: Without dead ends: 80 [2020-07-19 21:45:29,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1693, Invalid=4787, Unknown=0, NotChecked=0, Total=6480 [2020-07-19 21:45:29,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-19 21:45:29,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-07-19 21:45:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-19 21:45:29,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-07-19 21:45:29,169 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-07-19 21:45:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:29,169 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-07-19 21:45:29,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-19 21:45:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-07-19 21:45:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-07-19 21:45:29,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:29,170 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:29,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-19 21:45:29,381 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:29,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:29,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1578855496, now seen corresponding path program 24 times [2020-07-19 21:45:29,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:29,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480614719] [2020-07-19 21:45:29,382 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:45:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:30,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480614719] [2020-07-19 21:45:30,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801885134] [2020-07-19 21:45:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:45:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:30,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 21:45:30,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:32,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:32,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28] total 56 [2020-07-19 21:45:32,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589424179] [2020-07-19 21:45:32,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-19 21:45:32,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:32,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-19 21:45:32,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=2370, Unknown=0, NotChecked=0, Total=3080 [2020-07-19 21:45:32,320 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 56 states. [2020-07-19 21:45:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:34,499 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-07-19 21:45:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-19 21:45:34,500 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 74 [2020-07-19 21:45:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:34,501 INFO L225 Difference]: With dead ends: 104 [2020-07-19 21:45:34,501 INFO L226 Difference]: Without dead ends: 82 [2020-07-19 21:45:34,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1825, Invalid=5147, Unknown=0, NotChecked=0, Total=6972 [2020-07-19 21:45:34,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-19 21:45:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-07-19 21:45:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-19 21:45:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-07-19 21:45:34,506 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2020-07-19 21:45:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:34,506 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-07-19 21:45:34,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-19 21:45:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-07-19 21:45:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-19 21:45:34,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:34,507 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:34,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-19 21:45:34,708 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:34,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:34,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1300077050, now seen corresponding path program 25 times [2020-07-19 21:45:34,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:34,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387385866] [2020-07-19 21:45:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:45:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:36,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387385866] [2020-07-19 21:45:36,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024749515] [2020-07-19 21:45:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:45:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:36,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-19 21:45:36,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:37,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:37,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 58 [2020-07-19 21:45:37,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574412417] [2020-07-19 21:45:37,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-19 21:45:37,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:37,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-19 21:45:37,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=2542, Unknown=0, NotChecked=0, Total=3306 [2020-07-19 21:45:37,863 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 58 states. [2020-07-19 21:45:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:40,195 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-07-19 21:45:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-19 21:45:40,198 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 76 [2020-07-19 21:45:40,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:40,199 INFO L225 Difference]: With dead ends: 106 [2020-07-19 21:45:40,199 INFO L226 Difference]: Without dead ends: 84 [2020-07-19 21:45:40,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1962, Invalid=5520, Unknown=0, NotChecked=0, Total=7482 [2020-07-19 21:45:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-19 21:45:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-07-19 21:45:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-19 21:45:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-07-19 21:45:40,204 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-07-19 21:45:40,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:40,205 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-07-19 21:45:40,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-19 21:45:40,205 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-07-19 21:45:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-19 21:45:40,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:40,206 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:40,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-19 21:45:40,411 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:40,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:40,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1995315132, now seen corresponding path program 26 times [2020-07-19 21:45:40,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:40,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911771838] [2020-07-19 21:45:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:45:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:42,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911771838] [2020-07-19 21:45:42,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842972415] [2020-07-19 21:45:42,243 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:45:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:42,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-19 21:45:42,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:43,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:43,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 60 [2020-07-19 21:45:43,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651585841] [2020-07-19 21:45:43,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-19 21:45:43,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:43,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-19 21:45:43,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=2720, Unknown=0, NotChecked=0, Total=3540 [2020-07-19 21:45:43,960 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 60 states. [2020-07-19 21:45:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:46,547 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-07-19 21:45:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-19 21:45:46,547 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 78 [2020-07-19 21:45:46,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:46,549 INFO L225 Difference]: With dead ends: 108 [2020-07-19 21:45:46,549 INFO L226 Difference]: Without dead ends: 86 [2020-07-19 21:45:46,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2104, Invalid=5906, Unknown=0, NotChecked=0, Total=8010 [2020-07-19 21:45:46,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-19 21:45:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-07-19 21:45:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-19 21:45:46,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-07-19 21:45:46,555 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-07-19 21:45:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:46,555 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-07-19 21:45:46,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-19 21:45:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-07-19 21:45:46,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-19 21:45:46,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:46,556 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:46,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:46,768 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:46,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:46,768 INFO L82 PathProgramCache]: Analyzing trace with hash 104213758, now seen corresponding path program 27 times [2020-07-19 21:45:46,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:46,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687695804] [2020-07-19 21:45:46,769 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:45:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:48,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687695804] [2020-07-19 21:45:48,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526546617] [2020-07-19 21:45:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:45:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:48,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-19 21:45:48,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:50,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:50,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 62 [2020-07-19 21:45:50,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081566269] [2020-07-19 21:45:50,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-19 21:45:50,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:50,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-19 21:45:50,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=2904, Unknown=0, NotChecked=0, Total=3782 [2020-07-19 21:45:50,705 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 62 states. [2020-07-19 21:45:53,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:53,420 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-07-19 21:45:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-19 21:45:53,421 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 80 [2020-07-19 21:45:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:53,422 INFO L225 Difference]: With dead ends: 110 [2020-07-19 21:45:53,422 INFO L226 Difference]: Without dead ends: 88 [2020-07-19 21:45:53,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2251, Invalid=6305, Unknown=0, NotChecked=0, Total=8556 [2020-07-19 21:45:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-19 21:45:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-07-19 21:45:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-19 21:45:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-07-19 21:45:53,428 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-07-19 21:45:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:53,428 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-07-19 21:45:53,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-19 21:45:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-07-19 21:45:53,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-19 21:45:53,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:53,429 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:53,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-07-19 21:45:53,634 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:53,635 INFO L82 PathProgramCache]: Analyzing trace with hash -473040448, now seen corresponding path program 28 times [2020-07-19 21:45:53,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:53,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982486530] [2020-07-19 21:45:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:45:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:55,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982486530] [2020-07-19 21:45:55,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089570274] [2020-07-19 21:45:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:45:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:55,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 21:45:55,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:57,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:57,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 64 [2020-07-19 21:45:57,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825151327] [2020-07-19 21:45:57,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-19 21:45:57,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:57,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-19 21:45:57,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=938, Invalid=3094, Unknown=0, NotChecked=0, Total=4032 [2020-07-19 21:45:57,670 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 64 states. [2020-07-19 21:46:00,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:00,572 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-07-19 21:46:00,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-19 21:46:00,573 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 82 [2020-07-19 21:46:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:00,574 INFO L225 Difference]: With dead ends: 112 [2020-07-19 21:46:00,574 INFO L226 Difference]: Without dead ends: 90 [2020-07-19 21:46:00,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2403, Invalid=6717, Unknown=0, NotChecked=0, Total=9120 [2020-07-19 21:46:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-19 21:46:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-07-19 21:46:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-19 21:46:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-07-19 21:46:00,584 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2020-07-19 21:46:00,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:00,584 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-07-19 21:46:00,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-19 21:46:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-07-19 21:46:00,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-07-19 21:46:00,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:00,585 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:00,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:00,799 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:00,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:00,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1163551230, now seen corresponding path program 29 times [2020-07-19 21:46:00,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:00,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297637498] [2020-07-19 21:46:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:46:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:03,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297637498] [2020-07-19 21:46:03,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651504700] [2020-07-19 21:46:03,144 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:46:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:03,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-19 21:46:03,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:05,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:05,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 66 [2020-07-19 21:46:05,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647778492] [2020-07-19 21:46:05,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-19 21:46:05,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:05,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-19 21:46:05,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2020-07-19 21:46:05,325 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 66 states. [2020-07-19 21:46:08,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:08,458 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-07-19 21:46:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-19 21:46:08,459 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 84 [2020-07-19 21:46:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:08,460 INFO L225 Difference]: With dead ends: 114 [2020-07-19 21:46:08,460 INFO L226 Difference]: Without dead ends: 92 [2020-07-19 21:46:08,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2560, Invalid=7142, Unknown=0, NotChecked=0, Total=9702 [2020-07-19 21:46:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-19 21:46:08,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-07-19 21:46:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-19 21:46:08,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-07-19 21:46:08,466 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2020-07-19 21:46:08,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:08,467 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-07-19 21:46:08,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-19 21:46:08,467 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-07-19 21:46:08,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-19 21:46:08,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:08,468 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:08,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-07-19 21:46:08,679 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:08,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:08,680 INFO L82 PathProgramCache]: Analyzing trace with hash 975518148, now seen corresponding path program 30 times [2020-07-19 21:46:08,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:08,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094012288] [2020-07-19 21:46:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:46:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:11,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094012288] [2020-07-19 21:46:11,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050061461] [2020-07-19 21:46:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:46:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:11,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-19 21:46:11,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:13,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:13,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 68 [2020-07-19 21:46:13,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246809624] [2020-07-19 21:46:13,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-19 21:46:13,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:13,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-19 21:46:13,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1064, Invalid=3492, Unknown=0, NotChecked=0, Total=4556 [2020-07-19 21:46:13,434 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 68 states. [2020-07-19 21:46:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:16,721 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-07-19 21:46:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-19 21:46:16,727 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 86 [2020-07-19 21:46:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:16,728 INFO L225 Difference]: With dead ends: 116 [2020-07-19 21:46:16,728 INFO L226 Difference]: Without dead ends: 94 [2020-07-19 21:46:16,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2722, Invalid=7580, Unknown=0, NotChecked=0, Total=10302 [2020-07-19 21:46:16,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-19 21:46:16,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-07-19 21:46:16,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-19 21:46:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-07-19 21:46:16,732 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2020-07-19 21:46:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:16,733 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-07-19 21:46:16,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-19 21:46:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-07-19 21:46:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-07-19 21:46:16,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:16,733 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:16,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-07-19 21:46:16,934 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:16,935 INFO L82 PathProgramCache]: Analyzing trace with hash -668144378, now seen corresponding path program 31 times [2020-07-19 21:46:16,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:16,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092033747] [2020-07-19 21:46:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:46:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:19,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092033747] [2020-07-19 21:46:19,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551328501] [2020-07-19 21:46:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:46:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:19,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-19 21:46:19,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:22,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:22,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35] total 70 [2020-07-19 21:46:22,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173214745] [2020-07-19 21:46:22,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-19 21:46:22,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:22,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-19 21:46:22,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=3700, Unknown=0, NotChecked=0, Total=4830 [2020-07-19 21:46:22,124 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 70 states. [2020-07-19 21:46:25,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:25,760 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-07-19 21:46:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-19 21:46:25,761 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 88 [2020-07-19 21:46:25,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:25,762 INFO L225 Difference]: With dead ends: 118 [2020-07-19 21:46:25,762 INFO L226 Difference]: Without dead ends: 96 [2020-07-19 21:46:25,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2889, Invalid=8031, Unknown=0, NotChecked=0, Total=10920 [2020-07-19 21:46:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-19 21:46:25,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-07-19 21:46:25,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-19 21:46:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-07-19 21:46:25,768 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2020-07-19 21:46:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:25,769 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-07-19 21:46:25,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-19 21:46:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-07-19 21:46:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-19 21:46:25,769 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:25,770 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:25,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-19 21:46:25,981 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:25,982 INFO L82 PathProgramCache]: Analyzing trace with hash 320133064, now seen corresponding path program 32 times [2020-07-19 21:46:25,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:25,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208351012] [2020-07-19 21:46:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:46:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:28,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208351012] [2020-07-19 21:46:28,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394804285] [2020-07-19 21:46:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:46:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:28,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-19 21:46:28,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:31,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:31,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36] total 72 [2020-07-19 21:46:31,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836446300] [2020-07-19 21:46:31,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-19 21:46:31,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:31,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-19 21:46:31,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=3914, Unknown=0, NotChecked=0, Total=5112 [2020-07-19 21:46:31,600 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 72 states. [2020-07-19 21:46:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:35,540 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-07-19 21:46:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-19 21:46:35,541 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 90 [2020-07-19 21:46:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:35,543 INFO L225 Difference]: With dead ends: 120 [2020-07-19 21:46:35,543 INFO L226 Difference]: Without dead ends: 98 [2020-07-19 21:46:35,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=3061, Invalid=8495, Unknown=0, NotChecked=0, Total=11556 [2020-07-19 21:46:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-19 21:46:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-07-19 21:46:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-19 21:46:35,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-07-19 21:46:35,549 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2020-07-19 21:46:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:35,549 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-07-19 21:46:35,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-19 21:46:35,550 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-07-19 21:46:35,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-19 21:46:35,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:35,550 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:35,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-07-19 21:46:35,764 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash 866982410, now seen corresponding path program 33 times [2020-07-19 21:46:35,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:35,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591055638] [2020-07-19 21:46:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:46:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:38,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591055638] [2020-07-19 21:46:38,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227698015] [2020-07-19 21:46:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:46:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:38,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-19 21:46:38,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:41,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:41,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37] total 74 [2020-07-19 21:46:41,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745815408] [2020-07-19 21:46:41,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-07-19 21:46:41,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:41,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-07-19 21:46:41,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1268, Invalid=4134, Unknown=0, NotChecked=0, Total=5402 [2020-07-19 21:46:41,744 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 74 states. [2020-07-19 21:46:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:45,972 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-07-19 21:46:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-19 21:46:45,974 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 92 [2020-07-19 21:46:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:45,975 INFO L225 Difference]: With dead ends: 122 [2020-07-19 21:46:45,975 INFO L226 Difference]: Without dead ends: 100 [2020-07-19 21:46:45,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3238, Invalid=8972, Unknown=0, NotChecked=0, Total=12210 [2020-07-19 21:46:45,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-19 21:46:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-07-19 21:46:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-19 21:46:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-07-19 21:46:45,981 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2020-07-19 21:46:45,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:45,981 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-07-19 21:46:45,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-07-19 21:46:45,982 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-07-19 21:46:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-19 21:46:45,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:45,982 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:46,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-19 21:46:46,185 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:46,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1891773492, now seen corresponding path program 34 times [2020-07-19 21:46:46,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:46,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999784008] [2020-07-19 21:46:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:46:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:49,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999784008] [2020-07-19 21:46:49,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842523743] [2020-07-19 21:46:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:46:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:49,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-19 21:46:49,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:52,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:52,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38] total 76 [2020-07-19 21:46:52,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824472873] [2020-07-19 21:46:52,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-07-19 21:46:52,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:52,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-07-19 21:46:52,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1340, Invalid=4360, Unknown=0, NotChecked=0, Total=5700 [2020-07-19 21:46:52,582 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 76 states. [2020-07-19 21:46:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:57,152 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-07-19 21:46:57,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-19 21:46:57,154 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 94 [2020-07-19 21:46:57,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:57,155 INFO L225 Difference]: With dead ends: 124 [2020-07-19 21:46:57,155 INFO L226 Difference]: Without dead ends: 102 [2020-07-19 21:46:57,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3420, Invalid=9462, Unknown=0, NotChecked=0, Total=12882 [2020-07-19 21:46:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-19 21:46:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-07-19 21:46:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-19 21:46:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-07-19 21:46:57,160 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2020-07-19 21:46:57,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:57,160 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-07-19 21:46:57,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-07-19 21:46:57,160 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-07-19 21:46:57,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-19 21:46:57,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:57,161 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:57,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-19 21:46:57,373 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:57,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:57,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1233593614, now seen corresponding path program 35 times [2020-07-19 21:46:57,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:57,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750191301] [2020-07-19 21:46:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:46:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:00,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750191301] [2020-07-19 21:47:00,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375704992] [2020-07-19 21:47:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:47:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:00,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-19 21:47:00,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:04,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:04,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39] total 78 [2020-07-19 21:47:04,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639706476] [2020-07-19 21:47:04,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-07-19 21:47:04,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:04,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-07-19 21:47:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1414, Invalid=4592, Unknown=0, NotChecked=0, Total=6006 [2020-07-19 21:47:04,396 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 78 states. [2020-07-19 21:47:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:09,227 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-07-19 21:47:09,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-19 21:47:09,228 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 96 [2020-07-19 21:47:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:09,230 INFO L225 Difference]: With dead ends: 126 [2020-07-19 21:47:09,230 INFO L226 Difference]: Without dead ends: 104 [2020-07-19 21:47:09,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=3607, Invalid=9965, Unknown=0, NotChecked=0, Total=13572 [2020-07-19 21:47:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-19 21:47:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-07-19 21:47:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-19 21:47:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-07-19 21:47:09,236 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2020-07-19 21:47:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:09,236 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-07-19 21:47:09,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-07-19 21:47:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-07-19 21:47:09,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-07-19 21:47:09,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:09,237 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:09,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-19 21:47:09,449 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:09,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1765724720, now seen corresponding path program 36 times [2020-07-19 21:47:09,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:09,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351111044] [2020-07-19 21:47:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:47:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:13,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351111044] [2020-07-19 21:47:13,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086125372] [2020-07-19 21:47:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:47:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:13,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-19 21:47:13,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:17,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:17,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 40] total 80 [2020-07-19 21:47:17,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763094748] [2020-07-19 21:47:17,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-07-19 21:47:17,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:17,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-07-19 21:47:17,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=4830, Unknown=0, NotChecked=0, Total=6320 [2020-07-19 21:47:17,107 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 80 states. [2020-07-19 21:47:22,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:22,101 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-07-19 21:47:22,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-19 21:47:22,103 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 98 [2020-07-19 21:47:22,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:22,104 INFO L225 Difference]: With dead ends: 128 [2020-07-19 21:47:22,104 INFO L226 Difference]: Without dead ends: 106 [2020-07-19 21:47:22,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=3799, Invalid=10481, Unknown=0, NotChecked=0, Total=14280 [2020-07-19 21:47:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-19 21:47:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-07-19 21:47:22,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-19 21:47:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-07-19 21:47:22,109 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2020-07-19 21:47:22,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:22,109 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-07-19 21:47:22,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-07-19 21:47:22,109 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-07-19 21:47:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-19 21:47:22,109 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:22,110 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:22,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-19 21:47:22,310 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:22,311 INFO L82 PathProgramCache]: Analyzing trace with hash 2107379218, now seen corresponding path program 37 times [2020-07-19 21:47:22,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:22,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292926869] [2020-07-19 21:47:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:47:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:26,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292926869] [2020-07-19 21:47:26,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027951126] [2020-07-19 21:47:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:47:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:26,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-19 21:47:26,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:30,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:30,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41] total 82 [2020-07-19 21:47:30,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804736804] [2020-07-19 21:47:30,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-07-19 21:47:30,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:30,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-07-19 21:47:30,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1568, Invalid=5074, Unknown=0, NotChecked=0, Total=6642 [2020-07-19 21:47:30,222 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 82 states. [2020-07-19 21:47:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:35,507 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-07-19 21:47:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-19 21:47:35,508 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 100 [2020-07-19 21:47:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:35,509 INFO L225 Difference]: With dead ends: 130 [2020-07-19 21:47:35,510 INFO L226 Difference]: Without dead ends: 108 [2020-07-19 21:47:35,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=3996, Invalid=11010, Unknown=0, NotChecked=0, Total=15006 [2020-07-19 21:47:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-19 21:47:35,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-07-19 21:47:35,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-19 21:47:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-07-19 21:47:35,516 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2020-07-19 21:47:35,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:35,517 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-07-19 21:47:35,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-07-19 21:47:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-07-19 21:47:35,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-19 21:47:35,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:35,518 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:35,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:35,731 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:35,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:35,732 INFO L82 PathProgramCache]: Analyzing trace with hash 423618004, now seen corresponding path program 38 times [2020-07-19 21:47:35,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:35,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388500824] [2020-07-19 21:47:35,732 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:47:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:39,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388500824] [2020-07-19 21:47:39,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904691870] [2020-07-19 21:47:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:47:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:39,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-19 21:47:39,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:44,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:44,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42] total 84 [2020-07-19 21:47:44,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353075775] [2020-07-19 21:47:44,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-07-19 21:47:44,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:44,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-07-19 21:47:44,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1648, Invalid=5324, Unknown=0, NotChecked=0, Total=6972 [2020-07-19 21:47:44,112 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 84 states. [2020-07-19 21:47:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:50,016 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2020-07-19 21:47:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-19 21:47:50,018 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 102 [2020-07-19 21:47:50,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:50,019 INFO L225 Difference]: With dead ends: 132 [2020-07-19 21:47:50,020 INFO L226 Difference]: Without dead ends: 110 [2020-07-19 21:47:50,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=4198, Invalid=11552, Unknown=0, NotChecked=0, Total=15750 [2020-07-19 21:47:50,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-19 21:47:50,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-07-19 21:47:50,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-19 21:47:50,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-07-19 21:47:50,041 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 102 [2020-07-19 21:47:50,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:50,042 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-07-19 21:47:50,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-07-19 21:47:50,042 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-07-19 21:47:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-19 21:47:50,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:50,043 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:50,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:50,244 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:50,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1531761942, now seen corresponding path program 39 times [2020-07-19 21:47:50,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:50,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577571071] [2020-07-19 21:47:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:47:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:54,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577571071] [2020-07-19 21:47:54,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313335988] [2020-07-19 21:47:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:47:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:54,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-19 21:47:54,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:59,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:59,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43] total 86 [2020-07-19 21:47:59,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461012028] [2020-07-19 21:47:59,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-07-19 21:47:59,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:59,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-07-19 21:47:59,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1730, Invalid=5580, Unknown=0, NotChecked=0, Total=7310 [2020-07-19 21:47:59,200 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 86 states. [2020-07-19 21:48:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:05,396 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2020-07-19 21:48:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-19 21:48:05,397 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 104 [2020-07-19 21:48:05,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:05,399 INFO L225 Difference]: With dead ends: 134 [2020-07-19 21:48:05,399 INFO L226 Difference]: Without dead ends: 112 [2020-07-19 21:48:05,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=4405, Invalid=12107, Unknown=0, NotChecked=0, Total=16512 [2020-07-19 21:48:05,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-19 21:48:05,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-07-19 21:48:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-19 21:48:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2020-07-19 21:48:05,405 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 104 [2020-07-19 21:48:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:05,405 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2020-07-19 21:48:05,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-07-19 21:48:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2020-07-19 21:48:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-19 21:48:05,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:05,406 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:05,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-07-19 21:48:05,610 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:05,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:05,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1306196952, now seen corresponding path program 40 times [2020-07-19 21:48:05,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:05,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880796410] [2020-07-19 21:48:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:48:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:10,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880796410] [2020-07-19 21:48:10,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69384895] [2020-07-19 21:48:10,334 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:48:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:10,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-19 21:48:10,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:15,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:48:15,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44] total 88 [2020-07-19 21:48:15,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497959271] [2020-07-19 21:48:15,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-07-19 21:48:15,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:15,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-07-19 21:48:15,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1814, Invalid=5842, Unknown=0, NotChecked=0, Total=7656 [2020-07-19 21:48:15,401 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 88 states. [2020-07-19 21:48:21,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:21,963 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-07-19 21:48:21,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-19 21:48:21,964 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 106 [2020-07-19 21:48:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:21,965 INFO L225 Difference]: With dead ends: 136 [2020-07-19 21:48:21,966 INFO L226 Difference]: Without dead ends: 114 [2020-07-19 21:48:21,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=4617, Invalid=12675, Unknown=0, NotChecked=0, Total=17292 [2020-07-19 21:48:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-19 21:48:21,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-07-19 21:48:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-19 21:48:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-07-19 21:48:21,971 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 106 [2020-07-19 21:48:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:21,971 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-07-19 21:48:21,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-07-19 21:48:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-07-19 21:48:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-19 21:48:21,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:21,972 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:22,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:22,175 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:22,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:22,175 INFO L82 PathProgramCache]: Analyzing trace with hash -713393638, now seen corresponding path program 41 times [2020-07-19 21:48:22,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:22,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415072510] [2020-07-19 21:48:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:48:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:27,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415072510] [2020-07-19 21:48:27,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737322126] [2020-07-19 21:48:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:48:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:27,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-19 21:48:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:32,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:48:32,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 45] total 90 [2020-07-19 21:48:32,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943597199] [2020-07-19 21:48:32,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-07-19 21:48:32,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:32,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-07-19 21:48:32,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1900, Invalid=6110, Unknown=0, NotChecked=0, Total=8010 [2020-07-19 21:48:32,665 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 90 states. [2020-07-19 21:48:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:39,365 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2020-07-19 21:48:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-19 21:48:39,366 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 108 [2020-07-19 21:48:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:39,367 INFO L225 Difference]: With dead ends: 138 [2020-07-19 21:48:39,368 INFO L226 Difference]: Without dead ends: 116 [2020-07-19 21:48:39,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=4834, Invalid=13256, Unknown=0, NotChecked=0, Total=18090 [2020-07-19 21:48:39,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-19 21:48:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-07-19 21:48:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-07-19 21:48:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2020-07-19 21:48:39,373 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 108 [2020-07-19 21:48:39,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:39,374 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2020-07-19 21:48:39,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-07-19 21:48:39,374 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2020-07-19 21:48:39,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-19 21:48:39,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:39,374 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:39,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:39,575 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:39,576 INFO L82 PathProgramCache]: Analyzing trace with hash -214732836, now seen corresponding path program 42 times [2020-07-19 21:48:39,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:39,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929894039] [2020-07-19 21:48:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:48:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:45,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929894039] [2020-07-19 21:48:45,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155410219] [2020-07-19 21:48:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:48:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:45,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-19 21:48:45,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:51,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:48:51,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 46] total 92 [2020-07-19 21:48:51,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339383772] [2020-07-19 21:48:51,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-07-19 21:48:51,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:51,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-07-19 21:48:51,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1988, Invalid=6384, Unknown=0, NotChecked=0, Total=8372 [2020-07-19 21:48:51,499 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand 92 states. [2020-07-19 21:48:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:59,598 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-07-19 21:48:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-19 21:48:59,601 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 110 [2020-07-19 21:48:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:59,602 INFO L225 Difference]: With dead ends: 140 [2020-07-19 21:48:59,602 INFO L226 Difference]: Without dead ends: 118 [2020-07-19 21:48:59,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3010 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=5056, Invalid=13850, Unknown=0, NotChecked=0, Total=18906 [2020-07-19 21:48:59,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-19 21:48:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-07-19 21:48:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-19 21:48:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-07-19 21:48:59,608 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 110 [2020-07-19 21:48:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:59,608 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-07-19 21:48:59,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-07-19 21:48:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-07-19 21:48:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-07-19 21:48:59,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:59,609 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:59,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-07-19 21:48:59,810 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:59,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:59,811 INFO L82 PathProgramCache]: Analyzing trace with hash -2038039266, now seen corresponding path program 43 times [2020-07-19 21:48:59,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:59,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975112734] [2020-07-19 21:48:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:48:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:49:06,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975112734] [2020-07-19 21:49:06,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315581206] [2020-07-19 21:49:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:49:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:06,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-19 21:49:06,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:49:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:49:12,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:49:12,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 47] total 94 [2020-07-19 21:49:12,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421050269] [2020-07-19 21:49:12,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-07-19 21:49:12,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:49:12,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-07-19 21:49:12,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2078, Invalid=6664, Unknown=0, NotChecked=0, Total=8742 [2020-07-19 21:49:12,949 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 94 states. [2020-07-19 21:49:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:49:21,633 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2020-07-19 21:49:21,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-19 21:49:21,635 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 112 [2020-07-19 21:49:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:49:21,637 INFO L225 Difference]: With dead ends: 142 [2020-07-19 21:49:21,637 INFO L226 Difference]: Without dead ends: 120 [2020-07-19 21:49:21,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3146 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=5283, Invalid=14457, Unknown=0, NotChecked=0, Total=19740 [2020-07-19 21:49:21,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-19 21:49:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-07-19 21:49:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-07-19 21:49:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2020-07-19 21:49:21,644 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 112 [2020-07-19 21:49:21,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:49:21,644 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2020-07-19 21:49:21,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-07-19 21:49:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2020-07-19 21:49:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-19 21:49:21,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:49:21,646 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:49:21,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-07-19 21:49:21,859 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:49:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:49:21,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1888861728, now seen corresponding path program 44 times [2020-07-19 21:49:21,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:49:21,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218109879] [2020-07-19 21:49:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:49:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:49:29,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218109879] [2020-07-19 21:49:29,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314196507] [2020-07-19 21:49:29,221 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:49:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:29,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-19 21:49:29,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:49:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:49:36,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:49:36,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 48] total 96 [2020-07-19 21:49:36,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975752356] [2020-07-19 21:49:36,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-19 21:49:36,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:49:36,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-19 21:49:36,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2170, Invalid=6950, Unknown=0, NotChecked=0, Total=9120 [2020-07-19 21:49:36,591 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand 96 states. [2020-07-19 21:49:37,198 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:49:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:49:46,648 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2020-07-19 21:49:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-19 21:49:46,651 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 114 [2020-07-19 21:49:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:49:46,652 INFO L225 Difference]: With dead ends: 144 [2020-07-19 21:49:46,653 INFO L226 Difference]: Without dead ends: 122 [2020-07-19 21:49:46,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3285 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=5515, Invalid=15077, Unknown=0, NotChecked=0, Total=20592 [2020-07-19 21:49:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-19 21:49:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-07-19 21:49:46,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-19 21:49:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2020-07-19 21:49:46,658 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 114 [2020-07-19 21:49:46,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:49:46,658 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2020-07-19 21:49:46,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-19 21:49:46,659 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2020-07-19 21:49:46,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-07-19 21:49:46,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:49:46,659 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:49:46,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-07-19 21:49:46,860 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:49:46,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:49:46,861 INFO L82 PathProgramCache]: Analyzing trace with hash -263168478, now seen corresponding path program 45 times [2020-07-19 21:49:46,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:49:46,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860158999] [2020-07-19 21:49:46,862 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:49:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:49:55,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860158999] [2020-07-19 21:49:55,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237708214] [2020-07-19 21:49:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:49:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:55,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-19 21:49:55,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:50:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:50:03,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:50:03,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 49] total 98 [2020-07-19 21:50:03,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187076588] [2020-07-19 21:50:03,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-07-19 21:50:03,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:50:03,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-07-19 21:50:03,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2264, Invalid=7242, Unknown=0, NotChecked=0, Total=9506 [2020-07-19 21:50:03,690 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand 98 states. [2020-07-19 21:50:04,400 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:50:14,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:50:14,920 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2020-07-19 21:50:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-19 21:50:14,923 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 116 [2020-07-19 21:50:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:50:14,924 INFO L225 Difference]: With dead ends: 146 [2020-07-19 21:50:14,924 INFO L226 Difference]: Without dead ends: 124 [2020-07-19 21:50:14,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3427 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=5752, Invalid=15710, Unknown=0, NotChecked=0, Total=21462 [2020-07-19 21:50:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-19 21:50:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-07-19 21:50:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-19 21:50:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2020-07-19 21:50:14,933 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 116 [2020-07-19 21:50:14,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:50:14,933 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2020-07-19 21:50:14,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-07-19 21:50:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2020-07-19 21:50:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-19 21:50:14,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:50:14,934 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:50:15,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:50:15,149 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:50:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:50:15,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1340050972, now seen corresponding path program 46 times [2020-07-19 21:50:15,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:50:15,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85834632] [2020-07-19 21:50:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:50:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:50:24,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85834632] [2020-07-19 21:50:24,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078286431] [2020-07-19 21:50:24,082 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:50:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:24,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-19 21:50:24,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:50:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:50:33,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:50:33,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 50] total 100 [2020-07-19 21:50:33,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268413729] [2020-07-19 21:50:33,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-07-19 21:50:33,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:50:33,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-07-19 21:50:33,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2360, Invalid=7540, Unknown=0, NotChecked=0, Total=9900 [2020-07-19 21:50:33,006 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand 100 states. [2020-07-19 21:50:33,453 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:50:44,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:50:44,175 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2020-07-19 21:50:44,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-07-19 21:50:44,178 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 118 [2020-07-19 21:50:44,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:50:44,179 INFO L225 Difference]: With dead ends: 148 [2020-07-19 21:50:44,179 INFO L226 Difference]: Without dead ends: 126 [2020-07-19 21:50:44,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3572 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=5994, Invalid=16356, Unknown=0, NotChecked=0, Total=22350 [2020-07-19 21:50:44,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-19 21:50:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-07-19 21:50:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-19 21:50:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2020-07-19 21:50:44,186 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 118 [2020-07-19 21:50:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:50:44,187 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2020-07-19 21:50:44,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-07-19 21:50:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2020-07-19 21:50:44,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-19 21:50:44,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:50:44,188 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:50:44,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-07-19 21:50:44,389 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:50:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:50:44,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1137009370, now seen corresponding path program 47 times [2020-07-19 21:50:44,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:50:44,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607413857] [2020-07-19 21:50:44,391 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:50:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:50:54,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607413857] [2020-07-19 21:50:54,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328200055] [2020-07-19 21:50:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:50:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:54,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-19 21:50:54,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:51:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:51:04,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:51:04,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51] total 102 [2020-07-19 21:51:04,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488679579] [2020-07-19 21:51:04,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-07-19 21:51:04,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:51:04,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-07-19 21:51:04,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2458, Invalid=7844, Unknown=0, NotChecked=0, Total=10302 [2020-07-19 21:51:04,148 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand 102 states. [2020-07-19 21:51:04,901 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:51:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:51:17,153 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2020-07-19 21:51:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-19 21:51:17,157 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 120 [2020-07-19 21:51:17,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:51:17,158 INFO L225 Difference]: With dead ends: 150 [2020-07-19 21:51:17,158 INFO L226 Difference]: Without dead ends: 128 [2020-07-19 21:51:17,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3720 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=6241, Invalid=17015, Unknown=0, NotChecked=0, Total=23256 [2020-07-19 21:51:17,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-19 21:51:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-07-19 21:51:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-07-19 21:51:17,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-07-19 21:51:17,168 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 120 [2020-07-19 21:51:17,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:51:17,168 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-07-19 21:51:17,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-07-19 21:51:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-07-19 21:51:17,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-19 21:51:17,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:51:17,171 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:51:17,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:51:17,386 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:51:17,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:51:17,387 INFO L82 PathProgramCache]: Analyzing trace with hash 712441832, now seen corresponding path program 48 times [2020-07-19 21:51:17,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:51:17,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782198815] [2020-07-19 21:51:17,388 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:51:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:51:28,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782198815] [2020-07-19 21:51:28,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383772507] [2020-07-19 21:51:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:51:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:28,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 52 conjunts are in the unsatisfiable core [2020-07-19 21:51:28,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:51:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:51:39,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:51:39,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 52] total 104 [2020-07-19 21:51:39,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447272708] [2020-07-19 21:51:39,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-07-19 21:51:39,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:51:39,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-07-19 21:51:39,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=8154, Unknown=0, NotChecked=0, Total=10712 [2020-07-19 21:51:39,534 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 104 states. [2020-07-19 21:51:40,540 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:51:53,328 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:51:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:51:54,452 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2020-07-19 21:51:54,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-19 21:51:54,455 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 122 [2020-07-19 21:51:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:51:54,456 INFO L225 Difference]: With dead ends: 152 [2020-07-19 21:51:54,456 INFO L226 Difference]: Without dead ends: 130 [2020-07-19 21:51:54,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=6493, Invalid=17687, Unknown=0, NotChecked=0, Total=24180 [2020-07-19 21:51:54,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-19 21:51:54,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-07-19 21:51:54,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-19 21:51:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2020-07-19 21:51:54,462 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 122 [2020-07-19 21:51:54,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:51:54,462 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2020-07-19 21:51:54,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-07-19 21:51:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2020-07-19 21:51:54,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-19 21:51:54,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:51:54,463 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:51:54,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:51:54,666 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:51:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:51:54,666 INFO L82 PathProgramCache]: Analyzing trace with hash -81413590, now seen corresponding path program 49 times [2020-07-19 21:51:54,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:51:54,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539923420] [2020-07-19 21:51:54,667 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:51:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:52:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:52:07,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539923420] [2020-07-19 21:52:07,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968507932] [2020-07-19 21:52:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:52:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:52:07,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 53 conjunts are in the unsatisfiable core [2020-07-19 21:52:07,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:52:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:52:19,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:52:19,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 53] total 106 [2020-07-19 21:52:19,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392460373] [2020-07-19 21:52:19,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-07-19 21:52:19,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:52:19,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-07-19 21:52:19,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2660, Invalid=8470, Unknown=0, NotChecked=0, Total=11130 [2020-07-19 21:52:19,617 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 106 states. [2020-07-19 21:52:20,506 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:52:34,731 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:52:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:52:35,637 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-07-19 21:52:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-19 21:52:35,640 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 124 [2020-07-19 21:52:35,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:52:35,641 INFO L225 Difference]: With dead ends: 154 [2020-07-19 21:52:35,642 INFO L226 Difference]: Without dead ends: 132 [2020-07-19 21:52:35,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4025 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=6750, Invalid=18372, Unknown=0, NotChecked=0, Total=25122 [2020-07-19 21:52:35,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-19 21:52:35,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-07-19 21:52:35,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-19 21:52:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2020-07-19 21:52:35,648 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 124 [2020-07-19 21:52:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:52:35,648 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2020-07-19 21:52:35,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-07-19 21:52:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2020-07-19 21:52:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-19 21:52:35,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:52:35,649 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:52:35,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-07-19 21:52:35,850 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:52:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:52:35,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1527704556, now seen corresponding path program 50 times [2020-07-19 21:52:35,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:52:35,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985642793] [2020-07-19 21:52:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:52:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:52:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:52:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:52:38,180 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:52:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2505 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:52:50,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985642793] [2020-07-19 21:52:50,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868908365] [2020-07-19 21:52:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:52:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:52:50,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 54 conjunts are in the unsatisfiable core [2020-07-19 21:52:50,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:53:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2505 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:53:03,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:53:03,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54] total 108 [2020-07-19 21:53:03,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891794162] [2020-07-19 21:53:03,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-07-19 21:53:03,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:53:03,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-07-19 21:53:03,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2764, Invalid=8792, Unknown=0, NotChecked=0, Total=11556 [2020-07-19 21:53:03,237 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand 108 states. [2020-07-19 21:53:04,260 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:53:19,682 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:53:20,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:53:20,840 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2020-07-19 21:53:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-07-19 21:53:20,844 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 126 [2020-07-19 21:53:20,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:53:20,845 INFO L225 Difference]: With dead ends: 156 [2020-07-19 21:53:20,845 INFO L226 Difference]: Without dead ends: 134 [2020-07-19 21:53:20,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4182 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=7012, Invalid=19070, Unknown=0, NotChecked=0, Total=26082 [2020-07-19 21:53:20,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-19 21:53:20,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-07-19 21:53:20,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-07-19 21:53:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2020-07-19 21:53:20,850 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 126 [2020-07-19 21:53:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:53:20,851 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2020-07-19 21:53:20,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-07-19 21:53:20,851 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2020-07-19 21:53:20,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-19 21:53:20,851 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:53:20,851 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:53:21,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:53:21,052 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:53:21,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:53:21,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1702016302, now seen corresponding path program 51 times [2020-07-19 21:53:21,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:53:21,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273071195] [2020-07-19 21:53:21,054 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:53:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:53:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:53:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:53:21,335 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:21,466 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:21,605 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:21,750 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:21,903 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:22,062 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:22,227 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:22,401 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:22,579 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:22,764 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:22,957 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:23,156 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:23,362 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:23,576 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:23,795 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:24,021 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:24,253 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:24,493 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:24,740 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:25,012 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:25,272 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:25,543 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:25,819 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:26,101 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:26,390 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:26,680 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:26,950 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:27,257 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:27,571 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:27,896 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:28,225 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:28,561 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:28,905 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:29,255 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:29,605 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:29,939 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:30,310 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:30,675 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:31,048 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:31,425 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:31,807 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:32,211 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:32,608 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:33,007 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:33,415 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:33,832 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:34,639 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:35,090 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:35,548 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:36,019 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:36,489 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2606 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:53:36,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273071195] [2020-07-19 21:53:36,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694595792] [2020-07-19 21:53:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:53:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:53:36,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-19 21:53:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:53:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2606 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:53:51,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:53:51,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 55] total 110 [2020-07-19 21:53:51,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995888319] [2020-07-19 21:53:51,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-07-19 21:53:51,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:53:51,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-07-19 21:53:51,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2870, Invalid=9120, Unknown=0, NotChecked=0, Total=11990 [2020-07-19 21:53:51,215 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand 110 states. [2020-07-19 21:53:52,488 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:53:52,628 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:54:09,564 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:54:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:54:11,036 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2020-07-19 21:54:11,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-19 21:54:11,040 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 128 [2020-07-19 21:54:11,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:54:11,041 INFO L225 Difference]: With dead ends: 158 [2020-07-19 21:54:11,041 INFO L226 Difference]: Without dead ends: 136 [2020-07-19 21:54:11,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=7279, Invalid=19781, Unknown=0, NotChecked=0, Total=27060 [2020-07-19 21:54:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-19 21:54:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-07-19 21:54:11,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-07-19 21:54:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2020-07-19 21:54:11,048 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 128 [2020-07-19 21:54:11,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:54:11,048 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2020-07-19 21:54:11,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-07-19 21:54:11,048 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2020-07-19 21:54:11,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-19 21:54:11,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:54:11,049 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:54:11,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-07-19 21:54:11,250 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:54:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:54:11,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1711879664, now seen corresponding path program 52 times [2020-07-19 21:54:11,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:54:11,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091337218] [2020-07-19 21:54:11,251 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:54:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:54:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:54:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:54:11,567 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:11,709 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:11,858 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:12,014 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:12,178 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:12,348 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:12,526 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:12,711 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:12,903 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:13,103 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:13,310 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:13,522 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:13,744 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:13,973 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:14,208 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:14,450 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:14,700 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:14,958 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:15,221 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:15,475 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:15,742 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:15,992 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:16,288 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:16,591 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:16,889 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:17,195 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:17,505 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:17,822 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:18,147 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:18,476 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:18,814 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:19,177 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:19,530 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:19,890 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:20,263 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:20,638 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:21,016 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:21,766 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:22,183 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:22,606 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:23,036 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:23,478 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:23,926 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:24,381 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:24,841 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:25,308 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:25,785 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:26,265 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:26,753 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:27,255 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:27,772 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:28,285 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:54:28,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091337218] [2020-07-19 21:54:28,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415530657] [2020-07-19 21:54:28,533 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:54:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:54:28,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 56 conjunts are in the unsatisfiable core [2020-07-19 21:54:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:54:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:54:44,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:54:44,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 56] total 112 [2020-07-19 21:54:44,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973006964] [2020-07-19 21:54:44,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-07-19 21:54:44,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:54:44,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-07-19 21:54:44,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2978, Invalid=9454, Unknown=0, NotChecked=0, Total=12432 [2020-07-19 21:54:44,398 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand 112 states. [2020-07-19 21:54:45,615 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:54:46,742 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:54:49,578 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:54:49,870 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:54:57,700 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:02,811 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:03,375 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:03,942 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:04,244 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:55:05,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:55:05,579 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2020-07-19 21:55:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-07-19 21:55:05,584 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 130 [2020-07-19 21:55:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:55:05,585 INFO L225 Difference]: With dead ends: 160 [2020-07-19 21:55:05,585 INFO L226 Difference]: Without dead ends: 138 [2020-07-19 21:55:05,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4505 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=7551, Invalid=20505, Unknown=0, NotChecked=0, Total=28056 [2020-07-19 21:55:05,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-19 21:55:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-07-19 21:55:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-19 21:55:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2020-07-19 21:55:05,593 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 130 [2020-07-19 21:55:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:55:05,593 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2020-07-19 21:55:05,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-07-19 21:55:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2020-07-19 21:55:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-07-19 21:55:05,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:55:05,595 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:55:05,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-07-19 21:55:05,810 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:55:05,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:55:05,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1694331342, now seen corresponding path program 53 times [2020-07-19 21:55:05,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:55:05,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247174181] [2020-07-19 21:55:05,811 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:55:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:55:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:55:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:55:06,164 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:06,325 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:06,489 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:06,656 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:06,829 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:07,011 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:07,199 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:07,396 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:07,599 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:07,812 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:08,040 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:08,257 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:08,492 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:08,940 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:09,201 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:09,467 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:09,733 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:10,004 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:10,284 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:10,573 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:10,866 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:11,167 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:11,478 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:11,796 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:12,123 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:12,457 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:12,794 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:13,146 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:13,517 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:13,879 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:14,241 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:14,581 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:14,978 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:15,381 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:15,794 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:16,214 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:16,643 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:17,075 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:17,521 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:17,972 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:18,437 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:18,903 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:19,377 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:19,859 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:20,348 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:20,846 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:21,354 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:21,870 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:22,390 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:22,919 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:23,473 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:24,017 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:24,571 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2814 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:55:24,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247174181] [2020-07-19 21:55:24,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003585119] [2020-07-19 21:55:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:55:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:55:24,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-19 21:55:24,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:55:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2814 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:55:42,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:55:42,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 57] total 114 [2020-07-19 21:55:42,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747342081] [2020-07-19 21:55:42,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-07-19 21:55:42,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:55:42,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-07-19 21:55:42,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3088, Invalid=9794, Unknown=0, NotChecked=0, Total=12882 [2020-07-19 21:55:42,169 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand 114 states. [2020-07-19 21:55:43,644 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:55:43,795 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:43,947 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:44,107 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:44,274 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:44,453 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:44,637 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:44,832 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:45,033 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:45,242 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:45,460 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:45,688 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:45,925 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:46,169 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:46,421 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:46,681 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:46,950 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:47,228 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:47,513 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:47,809 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:48,725 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:49,068 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:50,092 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:50,461 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:51,579 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:52,774 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:53,188 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:54,045 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:54,905 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:55,371 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:55,853 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:56,335 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:56,827 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:57,328 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:57,839 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:58,372 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:58,903 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:59,447 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:59,993 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:00,548 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:01,110 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:01,685 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:02,268 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:02,865 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:03,468 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:03,851 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:56:05,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:56:05,560 INFO L93 Difference]: Finished difference Result 162 states and 168 transitions. [2020-07-19 21:56:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-07-19 21:56:05,564 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 132 [2020-07-19 21:56:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:56:05,565 INFO L225 Difference]: With dead ends: 162 [2020-07-19 21:56:05,566 INFO L226 Difference]: Without dead ends: 140 [2020-07-19 21:56:05,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4671 ImplicationChecksByTransitivity, 55.7s TimeCoverageRelationStatistics Valid=7828, Invalid=21242, Unknown=0, NotChecked=0, Total=29070 [2020-07-19 21:56:05,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-19 21:56:05,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-07-19 21:56:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-07-19 21:56:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2020-07-19 21:56:05,572 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 132 [2020-07-19 21:56:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:56:05,572 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2020-07-19 21:56:05,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-07-19 21:56:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2020-07-19 21:56:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-19 21:56:05,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:56:05,573 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:56:05,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:56:05,776 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:56:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:56:05,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1996938740, now seen corresponding path program 54 times [2020-07-19 21:56:05,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:56:05,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475430279] [2020-07-19 21:56:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:56:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:56:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:56:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:56:06,117 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:06,277 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:06,443 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:06,620 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:06,802 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:06,992 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:07,191 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:07,397 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:07,611 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:07,831 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:08,055 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:08,294 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:08,514 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:08,761 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:09,027 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:09,304 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:09,581 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:09,893 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:10,189 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:10,485 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:10,793 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:11,108 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:11,431 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:11,761 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:12,099 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:12,444 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:12,795 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:13,151 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:13,516 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:13,893 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:14,287 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:14,688 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:15,090 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:15,481 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:15,888 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:16,323 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:16,762 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:17,209 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:17,669 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:18,135 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:18,611 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:19,092 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:19,584 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:20,083 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:20,589 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:21,106 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:21,626 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:22,158 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:22,697 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:23,243 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:23,803 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:24,367 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:24,944 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:25,524 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:26,112 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2921 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:56:26,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475430279] [2020-07-19 21:56:26,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344126111] [2020-07-19 21:56:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:56:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:56:26,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 58 conjunts are in the unsatisfiable core [2020-07-19 21:56:26,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:56:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2921 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:56:45,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:56:45,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 58] total 116 [2020-07-19 21:56:45,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967888470] [2020-07-19 21:56:45,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-07-19 21:56:45,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:56:45,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-07-19 21:56:45,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3200, Invalid=10140, Unknown=0, NotChecked=0, Total=13340 [2020-07-19 21:56:45,300 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand 116 states. [2020-07-19 21:56:46,755 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:56:46,912 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:47,077 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:47,245 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:47,431 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:47,620 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:47,814 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:48,019 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:48,231 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:48,451 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:48,681 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:48,919 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:49,167 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:49,426 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:49,691 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:49,965 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:50,247 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:50,543 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:50,843 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:51,155 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:51,476 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:51,808 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:52,150 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:52,499 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:52,862 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:53,202 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:53,585 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:53,976 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:54,366 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:54,769 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:55,175 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:55,595 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:56,017 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:56,446 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:56,905 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:57,357 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:57,820 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:58,291 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:58,770 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:59,262 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:00,235 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:00,761 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:01,291 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:01,829 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:02,377 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:02,935 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:03,503 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:04,080 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:04,665 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:05,257 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:05,875 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:06,487 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:07,112 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:07,743 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:08,384 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:08,744 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:57:10,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:57:10,355 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2020-07-19 21:57:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-07-19 21:57:10,360 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 134 [2020-07-19 21:57:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:57:10,361 INFO L225 Difference]: With dead ends: 164 [2020-07-19 21:57:10,362 INFO L226 Difference]: Without dead ends: 142 [2020-07-19 21:57:10,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4840 ImplicationChecksByTransitivity, 60.7s TimeCoverageRelationStatistics Valid=8110, Invalid=21992, Unknown=0, NotChecked=0, Total=30102 [2020-07-19 21:57:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-19 21:57:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-07-19 21:57:10,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-19 21:57:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2020-07-19 21:57:10,367 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 134 [2020-07-19 21:57:10,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:57:10,368 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2020-07-19 21:57:10,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-07-19 21:57:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2020-07-19 21:57:10,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-19 21:57:10,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:57:10,368 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:57:10,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-07-19 21:57:10,569 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:57:10,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:57:10,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1664501046, now seen corresponding path program 55 times [2020-07-19 21:57:10,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:57:10,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712128315] [2020-07-19 21:57:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f [2020-07-19 21:57:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:57:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:57:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:57:10,949 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:11,117 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:11,292 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:11,476 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:11,668 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:11,867 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:12,078 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:12,297 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:12,523 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:12,759 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:13,001 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:13,254 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:13,513 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:13,784 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:14,062 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:14,368 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:14,663 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:14,966 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:15,277 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:15,582 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:15,902 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:16,226 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:16,584 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:16,936 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:17,293 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:17,662 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:18,035 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:18,420 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:18,815 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:19,218 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:19,633 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:20,053 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:20,484 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:20,922 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:21,372 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:21,822 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:22,275 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:22,740 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:23,173 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:23,672 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:24,174 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:24,689 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:25,208 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:25,737 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:26,293 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:26,837 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:27,392 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:27,954 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:28,536 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:29,121 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:29,711 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:30,307 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:30,913 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:31,528 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:32,149 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:32,781 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3030 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:57:33,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712128315] [2020-07-19 21:57:33,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834124690] [2020-07-19 21:57:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc0f63f 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 [2020-07-19 21:57:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:57:33,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-19 21:57:33,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:57:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3030 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:57:53,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:57:53,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 59] total 118 [2020-07-19 21:57:53,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254256091] [2020-07-19 21:57:53,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-07-19 21:57:53,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:57:53,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-07-19 21:57:53,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3314, Invalid=10492, Unknown=0, NotChecked=0, Total=13806 [2020-07-19 21:57:53,803 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand 118 states. [2020-07-19 21:57:55,248 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:57:55,416 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:55,589 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:55,766 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:55,951 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:56,150 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:56,355 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:56,571 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:56,795 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:57,030 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:57,272 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:57,526 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:57,786 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:58,056 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:58,336 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:58,627 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:58,924 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:59,233 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:59,547 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:59,876 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:00,215 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:00,565 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:00,934 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:01,303 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:01,679 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:02,064 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:02,457 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:02,862 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:03,274 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:03,702 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:04,104 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:04,565 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:05,016 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:05,479 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:05,950 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:06,432 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:06,917 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:07,416 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:07,928 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:08,448 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:08,982 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:09,516 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:10,023 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:10,575 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:58:11,156 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11