/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops-crafted-1/watermelon.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:48:26,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:48:26,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:48:26,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:48:26,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:48:26,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:48:26,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:48:26,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:48:26,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:48:26,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:48:26,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:48:26,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:48:26,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:48:26,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:48:26,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:48:26,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:48:26,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:48:26,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:48:26,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:48:26,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:48:26,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:48:26,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:48:26,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:48:26,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:48:26,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:48:26,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:48:26,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:48:26,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:48:26,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:48:26,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:48:26,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:48:26,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:48:26,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:48:26,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:48:26,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:48:26,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:48:26,189 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:48:26,243 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:48:26,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:48:26,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:48:26,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:48:26,248 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:48:26,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:48:26,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:48:26,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:48:26,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:48:26,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:48:26,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:48:26,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:48:26,252 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:48:26,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:48:26,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:48:26,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:48:26,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:48:26,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:48:26,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:48:26,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:48:26,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:48:26,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:48:26,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:48:26,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:48:26,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:48:26,255 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:48:26,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:48:26,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:48:26,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:48:26,775 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:48:26,775 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:48:26,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/watermelon.c [2020-12-22 04:48:26,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69312e49c/75740290287b4a32881f33cc741aabbe/FLAG052c001fa [2020-12-22 04:48:27,513 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:48:27,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c [2020-12-22 04:48:27,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69312e49c/75740290287b4a32881f33cc741aabbe/FLAG052c001fa [2020-12-22 04:48:27,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69312e49c/75740290287b4a32881f33cc741aabbe [2020-12-22 04:48:27,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:48:27,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:48:27,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:48:27,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:48:27,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:48:27,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:48:27" (1/1) ... [2020-12-22 04:48:27,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1868fc50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:27, skipping insertion in model container [2020-12-22 04:48:27,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:48:27" (1/1) ... [2020-12-22 04:48:27,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:48:27,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:48:28,048 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2020-12-22 04:48:28,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:48:28,080 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:48:28,095 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2020-12-22 04:48:28,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:48:28,122 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:48:28,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:28 WrapperNode [2020-12-22 04:48:28,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:48:28,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:48:28,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:48:28,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:48:28,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:28" (1/1) ... [2020-12-22 04:48:28,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:28" (1/1) ... [2020-12-22 04:48:28,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:48:28,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:48:28,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:48:28,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:48:28,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:28" (1/1) ... [2020-12-22 04:48:28,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:28" (1/1) ... [2020-12-22 04:48:28,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:28" (1/1) ... [2020-12-22 04:48:28,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:28" (1/1) ... [2020-12-22 04:48:28,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:28" (1/1) ... [2020-12-22 04:48:28,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:28" (1/1) ... [2020-12-22 04:48:28,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:28" (1/1) ... [2020-12-22 04:48:28,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:48:28,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:48:28,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:48:28,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:48:28,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:48:28,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:48:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:48:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:48:28,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:48:28,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:48:28,838 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-22 04:48:28,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:48:28 BoogieIcfgContainer [2020-12-22 04:48:28,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:48:28,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:48:28,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:48:28,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:48:28,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:48:27" (1/3) ... [2020-12-22 04:48:28,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72aa4f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:48:28, skipping insertion in model container [2020-12-22 04:48:28,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:28" (2/3) ... [2020-12-22 04:48:28,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72aa4f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:48:28, skipping insertion in model container [2020-12-22 04:48:28,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:48:28" (3/3) ... [2020-12-22 04:48:28,867 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.c [2020-12-22 04:48:28,882 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:48:28,894 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:48:28,915 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:48:28,943 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:48:28,943 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:48:28,943 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:48:28,943 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:48:28,944 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:48:28,944 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:48:28,944 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:48:28,944 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:48:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-22 04:48:28,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:48:28,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:28,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:28,966 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:28,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:28,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2143149025, now seen corresponding path program 1 times [2020-12-22 04:48:28,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:28,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133189908] [2020-12-22 04:48:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:29,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133189908] [2020-12-22 04:48:29,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:48:29,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 04:48:29,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801002993] [2020-12-22 04:48:29,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:48:29,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:29,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:48:29,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:48:29,363 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 8 states. [2020-12-22 04:48:29,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:29,683 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2020-12-22 04:48:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:48:29,686 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-22 04:48:29,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:29,698 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:48:29,698 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:48:29,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:48:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:48:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2020-12-22 04:48:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:48:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-12-22 04:48:29,745 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 11 [2020-12-22 04:48:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:29,746 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-12-22 04:48:29,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:48:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2020-12-22 04:48:29,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:48:29,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:29,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:29,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:48:29,747 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash -906524851, now seen corresponding path program 1 times [2020-12-22 04:48:29,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:29,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817335248] [2020-12-22 04:48:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:29,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817335248] [2020-12-22 04:48:29,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:48:29,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:48:29,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142929193] [2020-12-22 04:48:29,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:48:29,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:29,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:48:29,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:48:29,864 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 3 states. [2020-12-22 04:48:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:29,894 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-12-22 04:48:29,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:48:29,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-22 04:48:29,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:29,897 INFO L225 Difference]: With dead ends: 35 [2020-12-22 04:48:29,897 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:48:29,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:48:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:48:29,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-12-22 04:48:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:48:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-22 04:48:29,906 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2020-12-22 04:48:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:29,907 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-22 04:48:29,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:48:29,907 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-22 04:48:29,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:48:29,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:29,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:29,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:48:29,908 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:29,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:29,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1897717841, now seen corresponding path program 1 times [2020-12-22 04:48:29,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:29,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183503826] [2020-12-22 04:48:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:29,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183503826] [2020-12-22 04:48:29,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:48:29,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:48:29,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689796272] [2020-12-22 04:48:29,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:48:29,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:29,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:48:29,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:48:29,974 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 3 states. [2020-12-22 04:48:30,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:30,005 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-12-22 04:48:30,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:48:30,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-22 04:48:30,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:30,010 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:48:30,010 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:48:30,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:48:30,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:48:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-22 04:48:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:48:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-22 04:48:30,024 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 13 [2020-12-22 04:48:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:30,024 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-22 04:48:30,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:48:30,025 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-22 04:48:30,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:48:30,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:30,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:30,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:48:30,029 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:30,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:30,030 INFO L82 PathProgramCache]: Analyzing trace with hash 983883823, now seen corresponding path program 1 times [2020-12-22 04:48:30,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:30,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047289998] [2020-12-22 04:48:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:30,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047289998] [2020-12-22 04:48:30,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773089446] [2020-12-22 04:48:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:30,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:48:30,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:30,313 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:30,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:30,435 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:30,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:30,447 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:30,506 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:48:30,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:30,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2020-12-22 04:48:30,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738348897] [2020-12-22 04:48:30,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:48:30,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:30,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:48:30,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:48:30,672 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 5 states. [2020-12-22 04:48:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:30,818 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-22 04:48:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:48:30,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 04:48:30,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:30,820 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:48:30,820 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:48:30,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:48:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:48:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-12-22 04:48:30,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:48:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-12-22 04:48:30,829 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2020-12-22 04:48:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:30,829 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-12-22 04:48:30,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:48:30,829 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-12-22 04:48:30,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:48:30,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:30,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:31,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:31,046 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:31,048 INFO L82 PathProgramCache]: Analyzing trace with hash 891572815, now seen corresponding path program 1 times [2020-12-22 04:48:31,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:31,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924349511] [2020-12-22 04:48:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:31,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924349511] [2020-12-22 04:48:31,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707630868] [2020-12-22 04:48:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:31,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:48:31,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:31,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:31,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 04:48:31,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637327925] [2020-12-22 04:48:31,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:48:31,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:31,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:48:31,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:48:31,231 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 6 states. [2020-12-22 04:48:31,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:31,256 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-12-22 04:48:31,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:48:31,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-22 04:48:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:31,257 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:48:31,258 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:48:31,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:48:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:48:31,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-22 04:48:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:48:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-12-22 04:48:31,265 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2020-12-22 04:48:31,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:31,265 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-12-22 04:48:31,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:48:31,265 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-12-22 04:48:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:48:31,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:31,266 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:31,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:31,481 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:31,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:31,482 INFO L82 PathProgramCache]: Analyzing trace with hash 353844429, now seen corresponding path program 2 times [2020-12-22 04:48:31,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:31,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649234893] [2020-12-22 04:48:31,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:31,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649234893] [2020-12-22 04:48:31,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:48:31,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 04:48:31,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735038983] [2020-12-22 04:48:31,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:48:31,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:31,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:48:31,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:48:31,710 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-12-22 04:48:31,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:31,785 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-22 04:48:31,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:48:31,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-22 04:48:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:31,788 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:48:31,788 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:48:31,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:48:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:48:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-22 04:48:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:48:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-22 04:48:31,814 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2020-12-22 04:48:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:31,816 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-22 04:48:31,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:48:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-22 04:48:31,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:48:31,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:31,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:31,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 04:48:31,818 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:31,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1453414625, now seen corresponding path program 1 times [2020-12-22 04:48:31,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:31,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302570024] [2020-12-22 04:48:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:48:31,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302570024] [2020-12-22 04:48:31,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621006843] [2020-12-22 04:48:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:31,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:48:31,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:48:32,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:32,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 04:48:32,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473718515] [2020-12-22 04:48:32,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:48:32,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:32,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:48:32,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:48:32,075 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 10 states. [2020-12-22 04:48:32,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:32,132 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-12-22 04:48:32,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:48:32,132 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-12-22 04:48:32,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:32,137 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:48:32,137 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:48:32,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:48:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:48:32,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2020-12-22 04:48:32,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:48:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-12-22 04:48:32,155 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2020-12-22 04:48:32,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:32,155 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-12-22 04:48:32,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:48:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-12-22 04:48:32,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:48:32,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:32,157 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:32,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:32,372 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:32,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:32,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1197096229, now seen corresponding path program 1 times [2020-12-22 04:48:32,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:32,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900168938] [2020-12-22 04:48:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:32,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900168938] [2020-12-22 04:48:32,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953670375] [2020-12-22 04:48:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:32,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:48:32,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:32,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:32,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 04:48:32,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356541580] [2020-12-22 04:48:32,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:48:32,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:48:32,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:48:32,565 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-12-22 04:48:32,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:32,597 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-12-22 04:48:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:48:32,598 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-22 04:48:32,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:32,599 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:48:32,599 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:48:32,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:48:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:48:32,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-12-22 04:48:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 04:48:32,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-22 04:48:32,614 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2020-12-22 04:48:32,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:32,615 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-22 04:48:32,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:48:32,615 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-22 04:48:32,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:48:32,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:32,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:32,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:32,833 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:32,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:32,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1604143171, now seen corresponding path program 2 times [2020-12-22 04:48:32,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:32,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953495246] [2020-12-22 04:48:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:32,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953495246] [2020-12-22 04:48:32,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692895573] [2020-12-22 04:48:32,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:32,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:32,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:32,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:48:32,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:33,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:33,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 04:48:33,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727123457] [2020-12-22 04:48:33,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:48:33,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:33,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:48:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:48:33,054 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 10 states. [2020-12-22 04:48:33,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:33,097 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-12-22 04:48:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:48:33,097 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-22 04:48:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:33,098 INFO L225 Difference]: With dead ends: 59 [2020-12-22 04:48:33,098 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:48:33,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:48:33,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:48:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-12-22 04:48:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:48:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-12-22 04:48:33,106 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 23 [2020-12-22 04:48:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:33,106 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-12-22 04:48:33,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:48:33,107 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-12-22 04:48:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:48:33,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:33,108 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:33,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:33,322 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:33,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1602296129, now seen corresponding path program 1 times [2020-12-22 04:48:33,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:33,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671184415] [2020-12-22 04:48:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 04:48:33,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671184415] [2020-12-22 04:48:33,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:48:33,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 04:48:33,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906836535] [2020-12-22 04:48:33,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:48:33,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:33,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:48:33,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:48:33,385 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-12-22 04:48:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:33,466 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-12-22 04:48:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:48:33,467 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-12-22 04:48:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:33,468 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:48:33,468 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 04:48:33,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:48:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 04:48:33,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-12-22 04:48:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:48:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-22 04:48:33,476 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2020-12-22 04:48:33,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:33,476 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-22 04:48:33,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:48:33,476 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-22 04:48:33,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:48:33,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:33,477 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:33,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 04:48:33,477 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:33,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:33,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1934230497, now seen corresponding path program 3 times [2020-12-22 04:48:33,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:33,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993051865] [2020-12-22 04:48:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:33,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993051865] [2020-12-22 04:48:33,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545682471] [2020-12-22 04:48:33,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:33,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:48:33,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:33,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:48:33,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:33,788 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:33,929 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:33,948 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:33,950 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:33,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:33,974 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:34,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:34,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-12-22 04:48:34,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509563145] [2020-12-22 04:48:34,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:48:34,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:34,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:48:34,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:48:34,110 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 19 states. [2020-12-22 04:48:34,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:34,585 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-12-22 04:48:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:48:34,586 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2020-12-22 04:48:34,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:34,587 INFO L225 Difference]: With dead ends: 55 [2020-12-22 04:48:34,587 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:48:34,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:48:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:48:34,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-22 04:48:34,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:48:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-22 04:48:34,596 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 25 [2020-12-22 04:48:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:34,596 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-22 04:48:34,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:48:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-22 04:48:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:48:34,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:34,597 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:34,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:34,811 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:34,812 INFO L82 PathProgramCache]: Analyzing trace with hash 836427775, now seen corresponding path program 2 times [2020-12-22 04:48:34,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:34,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657126416] [2020-12-22 04:48:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:35,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657126416] [2020-12-22 04:48:35,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030394332] [2020-12-22 04:48:35,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:35,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:35,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:35,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:48:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:35,135 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:35,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:35,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:35,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:48:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:35,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:35,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-12-22 04:48:35,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404689153] [2020-12-22 04:48:35,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:48:35,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:35,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:48:35,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:48:35,443 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 19 states. [2020-12-22 04:48:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:35,890 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-12-22 04:48:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:48:35,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2020-12-22 04:48:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:35,892 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:48:35,892 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:48:35,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:48:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:48:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-12-22 04:48:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:48:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-22 04:48:35,901 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2020-12-22 04:48:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:35,902 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-22 04:48:35,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:48:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-22 04:48:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:48:35,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:35,903 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:36,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:36,117 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:36,118 INFO L82 PathProgramCache]: Analyzing trace with hash 924111969, now seen corresponding path program 3 times [2020-12-22 04:48:36,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:36,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069488180] [2020-12-22 04:48:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:36,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069488180] [2020-12-22 04:48:36,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589344021] [2020-12-22 04:48:36,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:36,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:48:36,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:36,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:48:36,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:36,510 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:36,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:48:36,754 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:36,756 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:36,759 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:36,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:36,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:36,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-12-22 04:48:36,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650868593] [2020-12-22 04:48:36,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:48:36,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:36,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:48:36,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:48:36,903 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 24 states. [2020-12-22 04:48:37,403 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-22 04:48:37,569 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:48:37,736 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:48:37,884 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:48:38,034 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-22 04:48:38,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:38,255 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-12-22 04:48:38,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:48:38,256 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-22 04:48:38,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:38,257 INFO L225 Difference]: With dead ends: 83 [2020-12-22 04:48:38,257 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:48:38,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:48:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:48:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2020-12-22 04:48:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 04:48:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-22 04:48:38,266 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 27 [2020-12-22 04:48:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:38,266 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-22 04:48:38,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:48:38,266 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-22 04:48:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:48:38,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:38,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:38,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:48:38,483 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:38,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:38,484 INFO L82 PathProgramCache]: Analyzing trace with hash -98803427, now seen corresponding path program 4 times [2020-12-22 04:48:38,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:38,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005535985] [2020-12-22 04:48:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:38,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005535985] [2020-12-22 04:48:38,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332029190] [2020-12-22 04:48:38,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:38,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:48:38,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:38,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:48:38,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:38,855 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:39,077 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:39,109 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:39,113 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:48:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:39,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:39,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-12-22 04:48:39,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353277620] [2020-12-22 04:48:39,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:48:39,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:39,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:48:39,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:48:39,278 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 24 states. [2020-12-22 04:48:39,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:39,993 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-12-22 04:48:39,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:48:39,993 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-22 04:48:39,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:39,994 INFO L225 Difference]: With dead ends: 65 [2020-12-22 04:48:39,994 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 04:48:39,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:48:39,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 04:48:40,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2020-12-22 04:48:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:48:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-12-22 04:48:40,006 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2020-12-22 04:48:40,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:40,007 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-12-22 04:48:40,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:48:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-12-22 04:48:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:48:40,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:40,008 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:40,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:40,222 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:40,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:40,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1588252031, now seen corresponding path program 5 times [2020-12-22 04:48:40,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:40,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818266666] [2020-12-22 04:48:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:40,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818266666] [2020-12-22 04:48:40,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293635638] [2020-12-22 04:48:40,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:40,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 04:48:40,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:40,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:48:40,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:40,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:40,765 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:40,786 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:40,787 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:40,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:40,802 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:40,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:40,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2020-12-22 04:48:40,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541214913] [2020-12-22 04:48:40,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:48:40,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:40,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:48:40,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:48:40,933 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 23 states. [2020-12-22 04:48:41,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:41,528 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-12-22 04:48:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:48:41,529 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 29 [2020-12-22 04:48:41,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:41,530 INFO L225 Difference]: With dead ends: 63 [2020-12-22 04:48:41,530 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:48:41,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:48:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:48:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-22 04:48:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:48:41,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-12-22 04:48:41,540 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 29 [2020-12-22 04:48:41,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:41,540 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-12-22 04:48:41,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:48:41,540 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-12-22 04:48:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:48:41,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:41,545 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:41,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:48:41,760 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:41,761 INFO L82 PathProgramCache]: Analyzing trace with hash -462032417, now seen corresponding path program 4 times [2020-12-22 04:48:41,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:41,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392471033] [2020-12-22 04:48:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:42,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392471033] [2020-12-22 04:48:42,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183602521] [2020-12-22 04:48:42,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:42,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:48:42,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:42,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:48:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:42,159 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:42,324 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:42,353 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:42,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:48:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:42,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:42,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2020-12-22 04:48:42,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888253138] [2020-12-22 04:48:42,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:48:42,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:42,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:48:42,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:48:42,498 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 23 states. [2020-12-22 04:48:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:43,047 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-12-22 04:48:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:48:43,048 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 29 [2020-12-22 04:48:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:43,048 INFO L225 Difference]: With dead ends: 53 [2020-12-22 04:48:43,048 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 04:48:43,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:48:43,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 04:48:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-12-22 04:48:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:48:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-12-22 04:48:43,059 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 29 [2020-12-22 04:48:43,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:43,060 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-12-22 04:48:43,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:48:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-12-22 04:48:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:48:43,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:43,060 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:43,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:48:43,274 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:43,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:43,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1355616703, now seen corresponding path program 5 times [2020-12-22 04:48:43,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:43,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921554656] [2020-12-22 04:48:43,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:43,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921554656] [2020-12-22 04:48:43,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356504056] [2020-12-22 04:48:43,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:43,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 04:48:43,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:43,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:48:43,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:43,710 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:44,048 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:48:44,064 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:44,066 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:44,068 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:44,079 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:44,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:44,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2020-12-22 04:48:44,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71206578] [2020-12-22 04:48:44,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:48:44,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:44,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:48:44,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:48:44,261 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 28 states. [2020-12-22 04:48:45,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:45,633 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-12-22 04:48:45,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:48:45,633 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-12-22 04:48:45,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:45,635 INFO L225 Difference]: With dead ends: 93 [2020-12-22 04:48:45,635 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:48:45,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:48:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:48:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2020-12-22 04:48:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:48:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-12-22 04:48:45,644 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2020-12-22 04:48:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:45,644 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-12-22 04:48:45,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:48:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-12-22 04:48:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:48:45,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:45,645 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:45,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:48:45,849 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:45,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:45,850 INFO L82 PathProgramCache]: Analyzing trace with hash 943358845, now seen corresponding path program 6 times [2020-12-22 04:48:45,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:45,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294913408] [2020-12-22 04:48:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:46,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294913408] [2020-12-22 04:48:46,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318462366] [2020-12-22 04:48:46,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:46,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 04:48:46,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:46,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:48:46,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:46,268 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:46,490 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:46,520 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:46,524 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:48:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:46,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:46,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2020-12-22 04:48:46,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541333917] [2020-12-22 04:48:46,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:48:46,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:46,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:48:46,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:48:46,786 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 28 states. [2020-12-22 04:48:47,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:47,615 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-12-22 04:48:47,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:48:47,615 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-12-22 04:48:47,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:47,615 INFO L225 Difference]: With dead ends: 71 [2020-12-22 04:48:47,615 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 04:48:47,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:48:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 04:48:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-12-22 04:48:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:48:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-22 04:48:47,626 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 31 [2020-12-22 04:48:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:47,626 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-22 04:48:47,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:48:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-22 04:48:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:48:47,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:47,627 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:47,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:48:47,841 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:47,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1916151841, now seen corresponding path program 7 times [2020-12-22 04:48:47,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:47,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320741917] [2020-12-22 04:48:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:48,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320741917] [2020-12-22 04:48:48,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295081842] [2020-12-22 04:48:48,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:48,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:48:48,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:48,252 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:48,538 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:48,554 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:48,556 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:48,558 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:48,575 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:48,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:48,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-12-22 04:48:48,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515863282] [2020-12-22 04:48:48,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:48:48,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:48,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:48:48,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:48:48,748 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 27 states. [2020-12-22 04:48:49,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:49,566 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-12-22 04:48:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:48:49,566 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2020-12-22 04:48:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:49,567 INFO L225 Difference]: With dead ends: 71 [2020-12-22 04:48:49,567 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:48:49,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:48:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:48:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-22 04:48:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:48:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-22 04:48:49,576 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 33 [2020-12-22 04:48:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:49,577 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-22 04:48:49,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:48:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-22 04:48:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:48:49,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:49,577 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:49,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:49,793 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:49,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1672289471, now seen corresponding path program 6 times [2020-12-22 04:48:49,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:49,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22976970] [2020-12-22 04:48:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:50,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22976970] [2020-12-22 04:48:50,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605075036] [2020-12-22 04:48:50,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:50,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 04:48:50,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:50,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:48:50,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:50,240 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:50,478 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:50,515 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:50,518 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:48:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:50,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:50,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-12-22 04:48:50,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775693521] [2020-12-22 04:48:50,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:48:50,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:50,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:48:50,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:48:50,705 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 27 states. [2020-12-22 04:48:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:51,431 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-12-22 04:48:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:48:51,431 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2020-12-22 04:48:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:51,432 INFO L225 Difference]: With dead ends: 59 [2020-12-22 04:48:51,432 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 04:48:51,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:48:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 04:48:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-12-22 04:48:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:48:51,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-12-22 04:48:51,440 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 33 [2020-12-22 04:48:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:51,441 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-12-22 04:48:51,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:48:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-12-22 04:48:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:48:51,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:51,442 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:51,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:51,647 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:51,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1028317473, now seen corresponding path program 7 times [2020-12-22 04:48:51,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:51,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418385824] [2020-12-22 04:48:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:52,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418385824] [2020-12-22 04:48:52,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262130652] [2020-12-22 04:48:52,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:52,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:48:52,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:52,141 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:52,519 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:48:52,538 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:52,540 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:52,542 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:52,551 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:52,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:52,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-12-22 04:48:52,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253728419] [2020-12-22 04:48:52,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:48:52,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:52,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:48:52,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:48:52,789 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 32 states. [2020-12-22 04:48:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:54,562 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-12-22 04:48:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:48:54,563 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-12-22 04:48:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:54,563 INFO L225 Difference]: With dead ends: 103 [2020-12-22 04:48:54,563 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:48:54,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:48:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:48:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2020-12-22 04:48:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:48:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-12-22 04:48:54,574 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 35 [2020-12-22 04:48:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:54,574 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-12-22 04:48:54,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:48:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-12-22 04:48:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:48:54,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:54,575 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:54,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:54,779 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:54,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:54,779 INFO L82 PathProgramCache]: Analyzing trace with hash 208821981, now seen corresponding path program 8 times [2020-12-22 04:48:54,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:54,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035573582] [2020-12-22 04:48:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:55,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035573582] [2020-12-22 04:48:55,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451545239] [2020-12-22 04:48:55,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:55,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:55,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:55,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:48:55,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:55,306 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:55,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:55,632 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:55,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:48:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:55,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:55,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-12-22 04:48:55,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851086818] [2020-12-22 04:48:55,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:48:55,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:55,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:48:55,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:48:55,905 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 32 states. [2020-12-22 04:48:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:56,877 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2020-12-22 04:48:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:48:56,877 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-12-22 04:48:56,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:56,878 INFO L225 Difference]: With dead ends: 77 [2020-12-22 04:48:56,878 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 04:48:56,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=473, Invalid=1333, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:48:56,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 04:48:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-12-22 04:48:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:48:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-22 04:48:56,890 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-12-22 04:48:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:56,890 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-22 04:48:56,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:48:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-22 04:48:56,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:48:56,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:56,891 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:57,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:48:57,106 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:57,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:57,106 INFO L82 PathProgramCache]: Analyzing trace with hash 863525695, now seen corresponding path program 9 times [2020-12-22 04:48:57,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:57,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825204387] [2020-12-22 04:48:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:57,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825204387] [2020-12-22 04:48:57,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300000001] [2020-12-22 04:48:57,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:57,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 04:48:57,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:57,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:48:57,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:57,591 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:57,920 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:57,936 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:57,937 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:48:57,939 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:57,948 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:48:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:58,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:58,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2020-12-22 04:48:58,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321998375] [2020-12-22 04:48:58,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:48:58,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:58,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:48:58,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:48:58,159 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 31 states. [2020-12-22 04:48:59,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:59,080 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-12-22 04:48:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:48:59,081 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 37 [2020-12-22 04:48:59,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:59,082 INFO L225 Difference]: With dead ends: 79 [2020-12-22 04:48:59,082 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:48:59,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=321, Invalid=1239, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:48:59,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:48:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-22 04:48:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:48:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-12-22 04:48:59,092 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2020-12-22 04:48:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:59,092 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-12-22 04:48:59,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:48:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-12-22 04:48:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:48:59,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:59,093 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:59,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:48:59,295 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:59,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:59,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1276272481, now seen corresponding path program 8 times [2020-12-22 04:48:59,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:59,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959669483] [2020-12-22 04:48:59,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:59,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959669483] [2020-12-22 04:48:59,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979190646] [2020-12-22 04:48:59,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:59,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:59,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:59,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:48:59,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:59,853 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:00,159 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:00,195 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:00,198 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:49:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:00,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:00,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2020-12-22 04:49:00,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893854622] [2020-12-22 04:49:00,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:49:00,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:00,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:49:00,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:49:00,417 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 31 states. [2020-12-22 04:49:01,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:01,333 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-12-22 04:49:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:49:01,335 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 37 [2020-12-22 04:49:01,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:01,336 INFO L225 Difference]: With dead ends: 65 [2020-12-22 04:49:01,336 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 04:49:01,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=430, Invalid=1130, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:49:01,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 04:49:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-12-22 04:49:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 04:49:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-12-22 04:49:01,344 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 37 [2020-12-22 04:49:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:01,345 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-12-22 04:49:01,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:49:01,345 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-12-22 04:49:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:49:01,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:01,345 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:01,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:49:01,546 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:01,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:01,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2138696961, now seen corresponding path program 9 times [2020-12-22 04:49:01,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:01,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608275182] [2020-12-22 04:49:01,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:02,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608275182] [2020-12-22 04:49:02,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024817510] [2020-12-22 04:49:02,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:02,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 04:49:02,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:02,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:49:02,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:02,128 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:02,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:02,617 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:02,619 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:02,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:02,630 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:02,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:02,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2020-12-22 04:49:02,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853755291] [2020-12-22 04:49:02,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:49:02,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:02,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:49:02,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:49:02,888 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 36 states. [2020-12-22 04:49:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:04,911 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-12-22 04:49:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:49:04,912 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-12-22 04:49:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:04,912 INFO L225 Difference]: With dead ends: 113 [2020-12-22 04:49:04,912 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:49:04,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=483, Invalid=1967, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:49:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:49:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2020-12-22 04:49:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 04:49:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-12-22 04:49:04,925 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 39 [2020-12-22 04:49:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:04,925 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-12-22 04:49:04,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:49:04,925 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-12-22 04:49:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:49:04,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:04,926 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:05,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:49:05,140 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:05,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:05,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1939262659, now seen corresponding path program 10 times [2020-12-22 04:49:05,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:05,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809472522] [2020-12-22 04:49:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:05,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809472522] [2020-12-22 04:49:05,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309447868] [2020-12-22 04:49:05,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:05,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:05,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:05,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:49:05,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:05,721 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:06,118 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:06,152 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:06,155 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:49:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:06,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:06,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2020-12-22 04:49:06,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256766162] [2020-12-22 04:49:06,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:49:06,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:06,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:49:06,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:49:06,512 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 36 states. [2020-12-22 04:49:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:07,753 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2020-12-22 04:49:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:49:07,754 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-12-22 04:49:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:07,754 INFO L225 Difference]: With dead ends: 83 [2020-12-22 04:49:07,755 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 04:49:07,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=587, Invalid=1669, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:49:07,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 04:49:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-12-22 04:49:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 04:49:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-12-22 04:49:07,765 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 39 [2020-12-22 04:49:07,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:07,765 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-12-22 04:49:07,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:49:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-12-22 04:49:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:49:07,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:07,765 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:07,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:49:07,966 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:07,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1861511265, now seen corresponding path program 11 times [2020-12-22 04:49:07,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:07,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123568590] [2020-12-22 04:49:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:08,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123568590] [2020-12-22 04:49:08,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265856460] [2020-12-22 04:49:08,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:08,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 04:49:08,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:08,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:49:08,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:08,512 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:08,936 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:08,953 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:08,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:08,956 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:08,963 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:09,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:09,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2020-12-22 04:49:09,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841590234] [2020-12-22 04:49:09,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:49:09,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:09,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:49:09,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:49:09,224 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 35 states. [2020-12-22 04:49:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:10,360 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-12-22 04:49:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:49:10,361 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 41 [2020-12-22 04:49:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:10,361 INFO L225 Difference]: With dead ends: 87 [2020-12-22 04:49:10,362 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:49:10,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:49:10,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:49:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-22 04:49:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:49:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-12-22 04:49:10,370 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 41 [2020-12-22 04:49:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:10,370 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-12-22 04:49:10,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:49:10,370 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-12-22 04:49:10,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:49:10,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:10,371 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:10,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:10,572 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:10,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:10,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1603583359, now seen corresponding path program 10 times [2020-12-22 04:49:10,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:10,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434048888] [2020-12-22 04:49:10,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:11,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434048888] [2020-12-22 04:49:11,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278660056] [2020-12-22 04:49:11,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:11,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:11,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:11,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:49:11,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:11,220 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:11,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:11,661 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:11,664 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:49:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:11,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:11,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2020-12-22 04:49:11,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647320324] [2020-12-22 04:49:11,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:49:11,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:11,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:49:11,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:49:11,937 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 35 states. [2020-12-22 04:49:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:13,029 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-12-22 04:49:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:49:13,030 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 41 [2020-12-22 04:49:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:13,030 INFO L225 Difference]: With dead ends: 71 [2020-12-22 04:49:13,030 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 04:49:13,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=541, Invalid=1439, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:49:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 04:49:13,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-12-22 04:49:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 04:49:13,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-12-22 04:49:13,043 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 41 [2020-12-22 04:49:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:13,043 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-12-22 04:49:13,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:49:13,043 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-12-22 04:49:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:49:13,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:13,044 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:13,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:49:13,258 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:13,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:13,258 INFO L82 PathProgramCache]: Analyzing trace with hash -573746719, now seen corresponding path program 11 times [2020-12-22 04:49:13,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:13,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290738293] [2020-12-22 04:49:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:13,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290738293] [2020-12-22 04:49:13,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962022619] [2020-12-22 04:49:13,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:13,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 04:49:13,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:13,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:49:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:13,909 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:14,508 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:14,527 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:14,528 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:14,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:14,538 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:14,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:14,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2020-12-22 04:49:14,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239074302] [2020-12-22 04:49:14,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:49:14,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:14,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:49:14,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1275, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:49:14,882 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 40 states. [2020-12-22 04:49:15,821 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:17,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:17,082 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-12-22 04:49:17,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:49:17,083 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-12-22 04:49:17,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:17,084 INFO L225 Difference]: With dead ends: 123 [2020-12-22 04:49:17,084 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 04:49:17,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=576, Invalid=2394, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:49:17,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 04:49:17,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2020-12-22 04:49:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 04:49:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-12-22 04:49:17,099 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 43 [2020-12-22 04:49:17,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:17,099 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-12-22 04:49:17,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:49:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-12-22 04:49:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:49:17,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:17,100 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:17,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:49:17,301 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:17,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:17,302 INFO L82 PathProgramCache]: Analyzing trace with hash -709607267, now seen corresponding path program 12 times [2020-12-22 04:49:17,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:17,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970958028] [2020-12-22 04:49:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:17,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970958028] [2020-12-22 04:49:17,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403751840] [2020-12-22 04:49:17,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:17,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 04:49:17,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:18,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:49:18,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:18,004 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:18,495 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:18,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:18,532 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:49:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:18,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:18,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2020-12-22 04:49:18,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933406976] [2020-12-22 04:49:18,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:49:18,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:18,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:49:18,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:49:18,935 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 40 states. [2020-12-22 04:49:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:20,295 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-12-22 04:49:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:49:20,295 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-12-22 04:49:20,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:20,296 INFO L225 Difference]: With dead ends: 89 [2020-12-22 04:49:20,297 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 04:49:20,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=714, Invalid=2042, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:49:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 04:49:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-12-22 04:49:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 04:49:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-12-22 04:49:20,308 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 43 [2020-12-22 04:49:20,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:20,309 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-12-22 04:49:20,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:49:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-12-22 04:49:20,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:49:20,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:20,309 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:20,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:20,520 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1278685953, now seen corresponding path program 13 times [2020-12-22 04:49:20,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:20,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873671711] [2020-12-22 04:49:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:21,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873671711] [2020-12-22 04:49:21,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121103860] [2020-12-22 04:49:21,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:21,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:49:21,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:21,167 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:21,691 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:21,706 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:21,707 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:21,709 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:21,715 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:22,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:22,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2020-12-22 04:49:22,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610383665] [2020-12-22 04:49:22,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:49:22,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:22,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:49:22,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1200, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:49:22,040 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 39 states. [2020-12-22 04:49:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:23,554 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-12-22 04:49:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:49:23,555 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 45 [2020-12-22 04:49:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:23,556 INFO L225 Difference]: With dead ends: 95 [2020-12-22 04:49:23,556 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:49:23,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:49:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:49:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-22 04:49:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:49:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-12-22 04:49:23,568 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 45 [2020-12-22 04:49:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:23,568 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-12-22 04:49:23,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:49:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-12-22 04:49:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:49:23,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:23,569 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:23,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:23,771 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:23,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:23,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1695567009, now seen corresponding path program 12 times [2020-12-22 04:49:23,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:23,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752414950] [2020-12-22 04:49:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:24,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752414950] [2020-12-22 04:49:24,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158733757] [2020-12-22 04:49:24,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:24,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 04:49:24,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:24,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:49:24,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:24,520 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:24,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:25,034 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:25,036 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:49:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:25,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:25,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2020-12-22 04:49:25,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139460745] [2020-12-22 04:49:25,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:49:25,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:25,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:49:25,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1186, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:49:25,421 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 39 states. [2020-12-22 04:49:26,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:26,712 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2020-12-22 04:49:26,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:49:26,713 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 45 [2020-12-22 04:49:26,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:26,714 INFO L225 Difference]: With dead ends: 77 [2020-12-22 04:49:26,714 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 04:49:26,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:49:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 04:49:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-12-22 04:49:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:49:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-12-22 04:49:26,726 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 45 [2020-12-22 04:49:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:26,726 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-12-22 04:49:26,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:49:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-12-22 04:49:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 04:49:26,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:26,733 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:26,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 04:49:26,947 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:26,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:26,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1371385919, now seen corresponding path program 13 times [2020-12-22 04:49:26,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:26,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115423599] [2020-12-22 04:49:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:27,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115423599] [2020-12-22 04:49:27,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172930228] [2020-12-22 04:49:27,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:27,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:49:27,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:27,654 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:28,373 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:28,388 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:28,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:28,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:28,398 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:28,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:28,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2020-12-22 04:49:28,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714304282] [2020-12-22 04:49:28,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:49:28,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:28,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:49:28,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:49:28,810 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 44 states. [2020-12-22 04:49:29,704 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:30,110 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:30,306 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:30,503 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:30,694 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:30,902 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:31,304 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-22 04:49:31,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:31,666 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-12-22 04:49:31,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:49:31,667 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-12-22 04:49:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:31,668 INFO L225 Difference]: With dead ends: 133 [2020-12-22 04:49:31,668 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 04:49:31,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=678, Invalid=2862, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:49:31,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 04:49:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2020-12-22 04:49:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 04:49:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-12-22 04:49:31,685 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 47 [2020-12-22 04:49:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:31,685 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-12-22 04:49:31,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:49:31,685 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-12-22 04:49:31,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 04:49:31,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:31,686 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:31,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:31,896 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:31,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1311193347, now seen corresponding path program 14 times [2020-12-22 04:49:31,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:31,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978724773] [2020-12-22 04:49:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:32,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978724773] [2020-12-22 04:49:32,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64538394] [2020-12-22 04:49:32,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:32,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:32,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:49:32,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:32,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:33,351 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:33,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:33,385 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:49:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:33,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:33,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2020-12-22 04:49:33,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600356299] [2020-12-22 04:49:33,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:49:33,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:33,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:49:33,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1530, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:49:33,885 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 44 states. [2020-12-22 04:49:35,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:35,618 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2020-12-22 04:49:35,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:49:35,619 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-12-22 04:49:35,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:35,619 INFO L225 Difference]: With dead ends: 95 [2020-12-22 04:49:35,619 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 04:49:35,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=854, Invalid=2452, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:49:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 04:49:35,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-12-22 04:49:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 04:49:35,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-12-22 04:49:35,633 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 47 [2020-12-22 04:49:35,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:35,633 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-12-22 04:49:35,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:49:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-12-22 04:49:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:49:35,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:35,634 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:35,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 04:49:35,848 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:35,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:35,848 INFO L82 PathProgramCache]: Analyzing trace with hash 417676127, now seen corresponding path program 15 times [2020-12-22 04:49:35,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:35,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010628437] [2020-12-22 04:49:35,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:36,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010628437] [2020-12-22 04:49:36,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788167206] [2020-12-22 04:49:36,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:36,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:49:36,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:36,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:49:36,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:36,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:37,244 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:37,262 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:37,263 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:37,265 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:37,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:37,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:37,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2020-12-22 04:49:37,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026644510] [2020-12-22 04:49:37,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:49:37,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:37,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:49:37,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:49:37,655 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 43 states. [2020-12-22 04:49:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:39,510 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2020-12-22 04:49:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:49:39,511 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2020-12-22 04:49:39,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:39,512 INFO L225 Difference]: With dead ends: 103 [2020-12-22 04:49:39,512 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:49:39,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=582, Invalid=2388, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:49:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:49:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-22 04:49:39,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 04:49:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-12-22 04:49:39,525 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 49 [2020-12-22 04:49:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:39,525 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-12-22 04:49:39,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:49:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-12-22 04:49:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:49:39,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:39,526 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:39,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:39,727 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:39,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1748746815, now seen corresponding path program 14 times [2020-12-22 04:49:39,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:39,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282730102] [2020-12-22 04:49:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:40,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282730102] [2020-12-22 04:49:40,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149656696] [2020-12-22 04:49:40,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:40,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:40,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:40,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:49:40,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:40,594 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:41,158 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:41,198 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:41,200 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:49:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:41,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:41,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2020-12-22 04:49:41,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692152183] [2020-12-22 04:49:41,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:49:41,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:41,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:49:41,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:49:41,655 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 43 states. [2020-12-22 04:49:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:43,264 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2020-12-22 04:49:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:49:43,265 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2020-12-22 04:49:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:43,266 INFO L225 Difference]: With dead ends: 83 [2020-12-22 04:49:43,266 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 04:49:43,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=802, Invalid=2168, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:49:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 04:49:43,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2020-12-22 04:49:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 04:49:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-12-22 04:49:43,281 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 49 [2020-12-22 04:49:43,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:43,282 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-12-22 04:49:43,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:49:43,282 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-12-22 04:49:43,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 04:49:43,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:43,282 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:43,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:49:43,497 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1489381025, now seen corresponding path program 15 times [2020-12-22 04:49:43,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:43,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353996797] [2020-12-22 04:49:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:44,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353996797] [2020-12-22 04:49:44,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942217414] [2020-12-22 04:49:44,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:44,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:49:44,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:44,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:49:44,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:44,387 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:45,253 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:45,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:45,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:45,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:45,283 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:45,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:45,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2020-12-22 04:49:45,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763468863] [2020-12-22 04:49:45,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:49:45,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:45,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:49:45,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1845, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:49:45,781 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 48 states. [2020-12-22 04:49:46,597 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-22 04:49:46,796 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:47,033 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:47,252 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:47,464 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:47,690 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:47,907 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:48,138 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:48,365 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:48,597 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:49:48,822 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-22 04:49:49,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:49,217 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2020-12-22 04:49:49,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:49:49,218 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2020-12-22 04:49:49,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:49,219 INFO L225 Difference]: With dead ends: 143 [2020-12-22 04:49:49,219 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 04:49:49,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=789, Invalid=3371, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:49:49,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 04:49:49,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2020-12-22 04:49:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 04:49:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-12-22 04:49:49,238 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 51 [2020-12-22 04:49:49,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:49,238 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-12-22 04:49:49,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:49:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-12-22 04:49:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 04:49:49,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:49,239 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:49,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:49:49,443 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:49,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:49,443 INFO L82 PathProgramCache]: Analyzing trace with hash 978060893, now seen corresponding path program 16 times [2020-12-22 04:49:49,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:49,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136911262] [2020-12-22 04:49:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:50,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136911262] [2020-12-22 04:49:50,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780743795] [2020-12-22 04:49:50,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:50,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:50,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:50,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:49:50,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:50,516 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:51,226 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:51,265 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:51,268 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:49:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:51,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:51,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2020-12-22 04:49:51,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293723480] [2020-12-22 04:49:51,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:49:51,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:51,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:49:51,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=1826, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:49:51,827 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 48 states. [2020-12-22 04:49:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:53,602 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-12-22 04:49:53,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:49:53,602 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2020-12-22 04:49:53,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:53,603 INFO L225 Difference]: With dead ends: 101 [2020-12-22 04:49:53,603 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 04:49:53,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1007, Invalid=2899, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:49:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 04:49:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-12-22 04:49:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 04:49:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-12-22 04:49:53,620 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 51 [2020-12-22 04:49:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:53,620 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-12-22 04:49:53,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:49:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-12-22 04:49:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 04:49:53,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:53,621 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:53,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:49:53,823 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:53,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1367745215, now seen corresponding path program 17 times [2020-12-22 04:49:53,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:53,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039607901] [2020-12-22 04:49:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:54,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039607901] [2020-12-22 04:49:54,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921717390] [2020-12-22 04:49:54,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:54,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-22 04:49:54,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:54,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:49:54,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:54,731 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:55,539 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:55,559 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:55,560 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:49:55,561 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:55,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:49:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:56,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:56,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 47 [2020-12-22 04:49:56,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448679260] [2020-12-22 04:49:56,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:49:56,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:56,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:49:56,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1754, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:49:56,059 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 47 states. [2020-12-22 04:49:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:58,377 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2020-12-22 04:49:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:49:58,378 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 53 [2020-12-22 04:49:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:58,379 INFO L225 Difference]: With dead ends: 111 [2020-12-22 04:49:58,379 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:49:58,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=687, Invalid=2853, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:49:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:49:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-22 04:49:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 04:49:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-12-22 04:49:58,394 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 53 [2020-12-22 04:49:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:58,395 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-12-22 04:49:58,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:49:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-12-22 04:49:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 04:49:58,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:58,395 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:58,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:49:58,597 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:58,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1146738145, now seen corresponding path program 16 times [2020-12-22 04:49:58,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:58,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389461731] [2020-12-22 04:49:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:59,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389461731] [2020-12-22 04:49:59,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115299530] [2020-12-22 04:49:59,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:59,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:59,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:59,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:49:59,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:59,678 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:00,409 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:00,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:00,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:50:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:01,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:01,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 47 [2020-12-22 04:50:01,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628543157] [2020-12-22 04:50:01,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:50:01,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:01,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:50:01,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1736, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:50:01,004 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 47 states. [2020-12-22 04:50:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:02,905 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-12-22 04:50:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:50:02,907 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 53 [2020-12-22 04:50:02,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:02,907 INFO L225 Difference]: With dead ends: 89 [2020-12-22 04:50:02,907 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 04:50:02,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=952, Invalid=2588, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:50:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 04:50:02,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-12-22 04:50:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 04:50:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-12-22 04:50:02,925 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 53 [2020-12-22 04:50:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:02,925 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-12-22 04:50:02,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:50:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-12-22 04:50:02,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 04:50:02,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:02,926 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:03,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:50:03,137 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:03,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:03,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2067142273, now seen corresponding path program 17 times [2020-12-22 04:50:03,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:03,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765114519] [2020-12-22 04:50:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:04,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765114519] [2020-12-22 04:50:04,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199445410] [2020-12-22 04:50:04,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:04,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-22 04:50:04,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:04,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:50:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:04,202 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:05,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:50:05,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:05,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:05,299 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:50:05,313 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:50:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:05,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:05,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 52 [2020-12-22 04:50:05,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594006546] [2020-12-22 04:50:05,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 04:50:05,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:05,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 04:50:05,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2169, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:50:05,933 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 52 states. [2020-12-22 04:50:06,758 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-22 04:50:06,958 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:07,184 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:07,386 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:07,598 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:07,800 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:08,003 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:08,205 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:08,411 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:08,626 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:08,838 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:09,047 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-22 04:50:09,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:09,436 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2020-12-22 04:50:09,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:50:09,437 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2020-12-22 04:50:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:09,438 INFO L225 Difference]: With dead ends: 153 [2020-12-22 04:50:09,438 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 04:50:09,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=909, Invalid=3921, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:50:09,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 04:50:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2020-12-22 04:50:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 04:50:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-12-22 04:50:09,458 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 55 [2020-12-22 04:50:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:09,458 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-12-22 04:50:09,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 04:50:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-12-22 04:50:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 04:50:09,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:09,459 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:09,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 04:50:09,674 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:09,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2087927485, now seen corresponding path program 18 times [2020-12-22 04:50:09,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:09,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344533365] [2020-12-22 04:50:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:10,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344533365] [2020-12-22 04:50:10,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854028089] [2020-12-22 04:50:10,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:10,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 04:50:10,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:10,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:50:10,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:10,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:11,800 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:11,842 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:11,844 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:50:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:12,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:12,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 52 [2020-12-22 04:50:12,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019965444] [2020-12-22 04:50:12,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 04:50:12,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:12,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 04:50:12,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=2148, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:50:12,574 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 52 states. [2020-12-22 04:50:14,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:14,948 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-12-22 04:50:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:50:14,949 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2020-12-22 04:50:14,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:14,950 INFO L225 Difference]: With dead ends: 107 [2020-12-22 04:50:14,950 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 04:50:14,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1173, Invalid=3383, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:50:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 04:50:14,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-12-22 04:50:14,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 04:50:14,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-12-22 04:50:14,973 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 55 [2020-12-22 04:50:14,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:14,974 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-12-22 04:50:14,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 04:50:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-12-22 04:50:14,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 04:50:14,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:14,974 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:15,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 04:50:15,183 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:15,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:15,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1497316577, now seen corresponding path program 19 times [2020-12-22 04:50:15,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:15,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994876075] [2020-12-22 04:50:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:16,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994876075] [2020-12-22 04:50:16,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370764758] [2020-12-22 04:50:16,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:16,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:50:16,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:16,252 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:17,249 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:17,268 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:17,270 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:17,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:50:17,282 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:50:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:17,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:17,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2020-12-22 04:50:17,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334139095] [2020-12-22 04:50:17,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 04:50:17,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:17,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 04:50:17,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2070, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:50:17,891 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 51 states. [2020-12-22 04:50:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:20,776 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2020-12-22 04:50:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:50:20,778 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 57 [2020-12-22 04:50:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:20,781 INFO L225 Difference]: With dead ends: 119 [2020-12-22 04:50:20,781 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:50:20,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=801, Invalid=3359, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:50:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:50:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-22 04:50:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 04:50:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-12-22 04:50:20,807 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 57 [2020-12-22 04:50:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:20,809 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-12-22 04:50:20,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 04:50:20,809 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-12-22 04:50:20,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 04:50:20,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:20,810 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:21,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:21,024 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:21,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:21,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1622398209, now seen corresponding path program 18 times [2020-12-22 04:50:21,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:21,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479926425] [2020-12-22 04:50:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:22,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479926425] [2020-12-22 04:50:22,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220648549] [2020-12-22 04:50:22,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:22,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-22 04:50:22,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:22,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:50:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:22,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:23,262 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:23,315 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:23,317 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:50:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:23,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:23,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2020-12-22 04:50:23,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121055283] [2020-12-22 04:50:23,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 04:50:23,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:23,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 04:50:23,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=2050, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:50:23,990 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 51 states. [2020-12-22 04:50:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:26,285 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2020-12-22 04:50:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:50:26,286 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 57 [2020-12-22 04:50:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:26,286 INFO L225 Difference]: With dead ends: 95 [2020-12-22 04:50:26,286 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 04:50:26,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1115, Invalid=3045, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:50:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 04:50:26,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-12-22 04:50:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 04:50:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-12-22 04:50:26,304 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 57 [2020-12-22 04:50:26,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:26,304 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-12-22 04:50:26,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 04:50:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-12-22 04:50:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 04:50:26,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:26,305 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:26,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 04:50:26,505 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:26,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:26,506 INFO L82 PathProgramCache]: Analyzing trace with hash 224354145, now seen corresponding path program 19 times [2020-12-22 04:50:26,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:26,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403439603] [2020-12-22 04:50:26,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:27,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403439603] [2020-12-22 04:50:27,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351109204] [2020-12-22 04:50:27,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:27,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:50:27,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:27,755 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:29,029 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:50:29,049 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:29,051 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:29,053 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:50:29,060 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:50:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:29,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:29,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 56 [2020-12-22 04:50:29,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811671175] [2020-12-22 04:50:29,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:50:29,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:29,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:50:29,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2519, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:50:29,821 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 56 states. [2020-12-22 04:50:30,558 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-22 04:50:30,832 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-22 04:50:31,115 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:31,414 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:31,700 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:31,978 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:32,255 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:32,542 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:32,821 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:33,111 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:33,406 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:33,702 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:33,996 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:50:34,300 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-22 04:50:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:34,733 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2020-12-22 04:50:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:50:34,734 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2020-12-22 04:50:34,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:34,735 INFO L225 Difference]: With dead ends: 163 [2020-12-22 04:50:34,735 INFO L226 Difference]: Without dead ends: 128 [2020-12-22 04:50:34,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1038, Invalid=4512, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:50:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-22 04:50:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 90. [2020-12-22 04:50:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 04:50:34,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-12-22 04:50:34,755 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 59 [2020-12-22 04:50:34,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:34,755 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-12-22 04:50:34,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:50:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-12-22 04:50:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 04:50:34,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:34,756 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:34,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:34,957 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:34,957 INFO L82 PathProgramCache]: Analyzing trace with hash 497266717, now seen corresponding path program 20 times [2020-12-22 04:50:34,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:34,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885636618] [2020-12-22 04:50:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:36,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885636618] [2020-12-22 04:50:36,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051784565] [2020-12-22 04:50:36,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:36,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:50:36,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:36,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:50:36,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:36,473 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:37,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:37,612 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:37,613 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:50:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:38,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:38,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 56 [2020-12-22 04:50:38,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920540101] [2020-12-22 04:50:38,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:50:38,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:38,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:50:38,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=2496, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:50:38,529 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 56 states. [2020-12-22 04:50:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:41,395 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2020-12-22 04:50:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:50:41,395 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2020-12-22 04:50:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:41,396 INFO L225 Difference]: With dead ends: 113 [2020-12-22 04:50:41,396 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 04:50:41,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1352, Invalid=3904, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 04:50:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 04:50:41,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-12-22 04:50:41,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 04:50:41,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-12-22 04:50:41,419 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 59 [2020-12-22 04:50:41,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:41,419 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-12-22 04:50:41,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:50:41,419 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-12-22 04:50:41,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 04:50:41,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:41,420 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:41,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 04:50:41,635 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:41,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1113957249, now seen corresponding path program 21 times [2020-12-22 04:50:41,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:41,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090455588] [2020-12-22 04:50:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:42,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090455588] [2020-12-22 04:50:42,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479906128] [2020-12-22 04:50:42,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:42,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-22 04:50:42,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:42,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:50:42,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:42,899 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:44,114 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:44,136 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:44,137 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:44,138 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:50:44,144 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:50:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:44,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:44,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 55 [2020-12-22 04:50:44,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657387006] [2020-12-22 04:50:44,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 04:50:44,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:44,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 04:50:44,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=558, Invalid=2412, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:50:44,898 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 55 states. [2020-12-22 04:50:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:47,887 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2020-12-22 04:50:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:50:47,889 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 61 [2020-12-22 04:50:47,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:47,890 INFO L225 Difference]: With dead ends: 127 [2020-12-22 04:50:47,890 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 04:50:47,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=924, Invalid=3906, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:50:47,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 04:50:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-22 04:50:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 04:50:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-12-22 04:50:47,907 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 61 [2020-12-22 04:50:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:47,907 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-12-22 04:50:47,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 04:50:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-12-22 04:50:47,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 04:50:47,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:47,907 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:48,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:48,109 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:48,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1463485663, now seen corresponding path program 20 times [2020-12-22 04:50:48,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:48,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832654188] [2020-12-22 04:50:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:49,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832654188] [2020-12-22 04:50:49,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549986632] [2020-12-22 04:50:49,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:49,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:50:49,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:49,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:50:49,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:49,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:50,853 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:50,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:50,910 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:50:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:51,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:51,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 55 [2020-12-22 04:50:51,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600964289] [2020-12-22 04:50:51,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 04:50:51,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:51,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 04:50:51,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=2390, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:50:51,744 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 55 states. [2020-12-22 04:50:54,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:54,368 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-12-22 04:50:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:50:54,370 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 61 [2020-12-22 04:50:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:54,370 INFO L225 Difference]: With dead ends: 101 [2020-12-22 04:50:54,370 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 04:50:54,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1291, Invalid=3539, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:50:54,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 04:50:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-12-22 04:50:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 04:50:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-12-22 04:50:54,395 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 61 [2020-12-22 04:50:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:54,396 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-12-22 04:50:54,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 04:50:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-12-22 04:50:54,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 04:50:54,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:54,396 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:54,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 04:50:54,608 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:54,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:54,608 INFO L82 PathProgramCache]: Analyzing trace with hash -2063646399, now seen corresponding path program 21 times [2020-12-22 04:50:54,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:54,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877485415] [2020-12-22 04:50:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:56,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877485415] [2020-12-22 04:50:56,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539293154] [2020-12-22 04:50:56,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:56,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-22 04:50:56,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:56,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:50:56,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:56,113 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:57,700 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:50:57,721 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:57,722 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:50:57,723 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:50:57,729 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:50:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:58,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:58,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 60 [2020-12-22 04:50:58,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065662936] [2020-12-22 04:50:58,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 04:50:58,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:58,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 04:50:58,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=645, Invalid=2895, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:50:58,700 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 60 states. [2020-12-22 04:50:59,483 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-22 04:50:59,741 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-22 04:50:59,987 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:00,258 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:00,510 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:00,752 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:01,007 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:01,260 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:01,514 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:01,779 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:02,046 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:02,313 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:02,577 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:02,848 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:03,122 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-22 04:51:03,340 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2020-12-22 04:51:03,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:03,636 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2020-12-22 04:51:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:51:03,638 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 63 [2020-12-22 04:51:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:03,639 INFO L225 Difference]: With dead ends: 173 [2020-12-22 04:51:03,639 INFO L226 Difference]: Without dead ends: 136 [2020-12-22 04:51:03,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1176, Invalid=5144, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 04:51:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-22 04:51:03,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-12-22 04:51:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 04:51:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-12-22 04:51:03,663 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 63 [2020-12-22 04:51:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:03,663 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-12-22 04:51:03,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 04:51:03,663 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-12-22 04:51:03,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 04:51:03,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:03,664 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:03,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 04:51:03,865 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:03,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:03,865 INFO L82 PathProgramCache]: Analyzing trace with hash -14509443, now seen corresponding path program 22 times [2020-12-22 04:51:03,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:03,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067766310] [2020-12-22 04:51:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:05,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067766310] [2020-12-22 04:51:05,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878015737] [2020-12-22 04:51:05,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:05,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:51:05,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:05,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:51:05,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:05,759 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:07,096 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:07,147 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:07,149 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:51:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:08,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:08,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 60 [2020-12-22 04:51:08,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124225509] [2020-12-22 04:51:08,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 04:51:08,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:08,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 04:51:08,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=2870, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:51:08,245 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 60 states. [2020-12-22 04:51:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:12,050 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2020-12-22 04:51:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:51:12,050 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 63 [2020-12-22 04:51:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:12,051 INFO L225 Difference]: With dead ends: 119 [2020-12-22 04:51:12,052 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 04:51:12,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1544, Invalid=4462, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 04:51:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 04:51:12,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-12-22 04:51:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 04:51:12,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-12-22 04:51:12,081 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 63 [2020-12-22 04:51:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:12,081 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-12-22 04:51:12,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 04:51:12,082 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-12-22 04:51:12,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 04:51:12,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:12,082 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:12,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 04:51:12,285 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:12,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:12,285 INFO L82 PathProgramCache]: Analyzing trace with hash 990392031, now seen corresponding path program 23 times [2020-12-22 04:51:12,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:12,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282447888] [2020-12-22 04:51:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 146 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:13,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282447888] [2020-12-22 04:51:13,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347723637] [2020-12-22 04:51:13,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:13,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-22 04:51:13,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:13,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:51:13,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:13,878 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:15,440 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:15,472 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:15,473 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:15,474 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:51:15,482 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:51:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:16,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:16,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 59 [2020-12-22 04:51:16,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334932566] [2020-12-22 04:51:16,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 04:51:16,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:16,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 04:51:16,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=2780, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:51:16,469 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 59 states. [2020-12-22 04:51:19,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:19,735 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2020-12-22 04:51:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:51:19,737 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 65 [2020-12-22 04:51:19,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:19,738 INFO L225 Difference]: With dead ends: 135 [2020-12-22 04:51:19,738 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 04:51:19,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1056, Invalid=4494, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:51:19,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 04:51:19,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-22 04:51:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 04:51:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-12-22 04:51:19,758 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 65 [2020-12-22 04:51:19,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:19,759 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-12-22 04:51:19,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 04:51:19,759 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-12-22 04:51:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 04:51:19,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:19,759 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:19,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-22 04:51:19,960 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:19,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2056259649, now seen corresponding path program 22 times [2020-12-22 04:51:19,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:19,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106102672] [2020-12-22 04:51:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 121 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:21,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106102672] [2020-12-22 04:51:21,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264046907] [2020-12-22 04:51:21,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:21,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:51:21,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:21,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:51:21,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:21,992 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:23,544 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:23,609 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:23,610 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:51:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:24,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:24,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 59 [2020-12-22 04:51:24,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010220335] [2020-12-22 04:51:24,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 04:51:24,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:24,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 04:51:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=2756, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:51:24,715 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 59 states. [2020-12-22 04:51:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:28,047 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-12-22 04:51:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:51:28,049 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 65 [2020-12-22 04:51:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:28,050 INFO L225 Difference]: With dead ends: 107 [2020-12-22 04:51:28,050 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 04:51:28,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1480, Invalid=4070, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:51:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 04:51:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2020-12-22 04:51:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 04:51:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-12-22 04:51:28,075 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 65 [2020-12-22 04:51:28,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:28,075 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-12-22 04:51:28,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 04:51:28,076 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-12-22 04:51:28,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 04:51:28,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:28,076 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:28,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:28,277 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:28,277 INFO L82 PathProgramCache]: Analyzing trace with hash -104661983, now seen corresponding path program 23 times [2020-12-22 04:51:28,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:28,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500789052] [2020-12-22 04:51:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:30,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500789052] [2020-12-22 04:51:30,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460768371] [2020-12-22 04:51:30,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:30,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-22 04:51:30,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:30,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:51:30,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:30,325 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:32,463 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:51:32,489 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:32,490 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:32,491 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:51:32,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:51:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:33,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:33,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 64 [2020-12-22 04:51:33,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806692105] [2020-12-22 04:51:33,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 04:51:33,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:33,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 04:51:33,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=735, Invalid=3297, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:51:33,841 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 64 states. [2020-12-22 04:51:34,347 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-12-22 04:51:34,573 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2020-12-22 04:51:34,847 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-22 04:51:35,148 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-22 04:51:35,439 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:35,797 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:36,148 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:36,491 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:36,836 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:37,195 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:37,553 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:37,904 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:38,262 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:38,632 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:39,003 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:39,375 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:39,729 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:51:40,096 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-22 04:51:40,384 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2020-12-22 04:51:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:40,785 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2020-12-22 04:51:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:51:40,787 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 67 [2020-12-22 04:51:40,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:40,788 INFO L225 Difference]: With dead ends: 183 [2020-12-22 04:51:40,788 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 04:51:40,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1323, Invalid=5817, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 04:51:40,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 04:51:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2020-12-22 04:51:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 04:51:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-12-22 04:51:40,819 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 67 [2020-12-22 04:51:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:40,820 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-12-22 04:51:40,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 04:51:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-12-22 04:51:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 04:51:40,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:40,820 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:41,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:41,034 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:41,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:41,034 INFO L82 PathProgramCache]: Analyzing trace with hash -500875811, now seen corresponding path program 24 times [2020-12-22 04:51:41,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:41,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931345132] [2020-12-22 04:51:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:43,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931345132] [2020-12-22 04:51:43,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859475463] [2020-12-22 04:51:43,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:43,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-22 04:51:43,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:43,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:51:43,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:43,619 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:45,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:45,342 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:45,344 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:51:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:46,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:46,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 64 [2020-12-22 04:51:46,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306441740] [2020-12-22 04:51:46,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 04:51:46,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:46,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 04:51:46,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=762, Invalid=3270, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:51:46,868 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 64 states. [2020-12-22 04:51:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:51,514 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2020-12-22 04:51:51,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:51:51,514 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 67 [2020-12-22 04:51:51,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:51,515 INFO L225 Difference]: With dead ends: 125 [2020-12-22 04:51:51,516 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 04:51:51,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2314 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1749, Invalid=5057, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 04:51:51,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 04:51:51,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2020-12-22 04:51:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 04:51:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-12-22 04:51:51,539 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 67 [2020-12-22 04:51:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:51,540 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-12-22 04:51:51,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 04:51:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-12-22 04:51:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 04:51:51,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:51,541 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:51,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-22 04:51:51,742 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:51,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:51,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1743747647, now seen corresponding path program 25 times [2020-12-22 04:51:51,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:51,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594741674] [2020-12-22 04:51:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 171 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:53,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594741674] [2020-12-22 04:51:53,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393290979] [2020-12-22 04:51:53,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:53,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:51:53,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:53,839 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:55,960 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:55,988 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:55,988 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:51:55,989 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:51:55,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:51:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:57,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:57,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 63 [2020-12-22 04:51:57,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927583756] [2020-12-22 04:51:57,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 04:51:57,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:57,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 04:51:57,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=3174, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:51:57,285 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 63 states. [2020-12-22 04:51:58,110 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-12-22 04:51:58,441 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 04:51:58,787 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 04:51:59,118 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 04:51:59,443 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 04:51:59,769 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 04:52:00,100 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 04:52:00,421 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 04:52:00,755 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 04:52:01,088 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 04:52:01,423 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 04:52:01,764 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 04:52:02,105 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 04:52:02,705 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-12-22 04:52:02,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:02,982 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-12-22 04:52:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:52:02,985 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 69 [2020-12-22 04:52:02,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:02,986 INFO L225 Difference]: With dead ends: 143 [2020-12-22 04:52:02,986 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 04:52:02,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1197, Invalid=5123, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 04:52:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 04:52:03,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-22 04:52:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 04:52:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-12-22 04:52:03,021 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 69 [2020-12-22 04:52:03,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:03,021 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-12-22 04:52:03,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 04:52:03,021 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-12-22 04:52:03,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 04:52:03,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:03,022 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:03,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:03,236 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1306018719, now seen corresponding path program 24 times [2020-12-22 04:52:03,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:03,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072805665] [2020-12-22 04:52:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:05,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072805665] [2020-12-22 04:52:05,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583350144] [2020-12-22 04:52:05,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:05,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-22 04:52:05,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:05,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:52:05,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:05,841 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:52:07,715 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:52:07,777 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:52:07,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:52:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:09,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:09,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 63 [2020-12-22 04:52:09,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248861904] [2020-12-22 04:52:09,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 04:52:09,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:09,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 04:52:09,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=3148, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:52:09,163 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 63 states. [2020-12-22 04:52:13,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:13,496 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2020-12-22 04:52:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:52:13,498 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 69 [2020-12-22 04:52:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:13,498 INFO L225 Difference]: With dead ends: 113 [2020-12-22 04:52:13,498 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 04:52:13,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1682, Invalid=4638, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 04:52:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 04:52:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-12-22 04:52:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 04:52:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-12-22 04:52:13,527 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 69 [2020-12-22 04:52:13,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:13,527 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-12-22 04:52:13,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 04:52:13,527 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-12-22 04:52:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 04:52:13,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:13,528 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:13,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 04:52:13,728 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:13,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1229443073, now seen corresponding path program 25 times [2020-12-22 04:52:13,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:13,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972477678] [2020-12-22 04:52:13,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:15,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972477678] [2020-12-22 04:52:15,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333701330] [2020-12-22 04:52:15,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:15,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:52:15,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:15,857 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:52:18,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:52:18,302 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:52:18,303 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:52:18,304 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:52:18,313 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:52:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:19,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:19,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 68 [2020-12-22 04:52:19,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777056637] [2020-12-22 04:52:19,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 04:52:19,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:19,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 04:52:19,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=3725, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:52:19,856 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 68 states. [2020-12-22 04:52:20,388 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-12-22 04:52:20,648 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2020-12-22 04:52:20,936 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-22 04:52:21,296 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-22 04:52:21,626 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:22,003 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:22,365 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:22,730 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:23,103 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:23,457 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:23,814 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:24,176 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:24,550 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:24,912 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:25,287 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:25,651 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:26,042 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:26,423 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 04:52:26,831 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-22 04:52:27,130 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2020-12-22 04:52:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:27,561 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2020-12-22 04:52:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:52:27,564 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 71 [2020-12-22 04:52:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:27,565 INFO L225 Difference]: With dead ends: 193 [2020-12-22 04:52:27,565 INFO L226 Difference]: Without dead ends: 152 [2020-12-22 04:52:27,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2763 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1479, Invalid=6531, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 04:52:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-22 04:52:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 108. [2020-12-22 04:52:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 04:52:27,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-12-22 04:52:27,604 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 71 [2020-12-22 04:52:27,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:27,604 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-12-22 04:52:27,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 04:52:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-12-22 04:52:27,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 04:52:27,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:27,605 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:27,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-22 04:52:27,806 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:27,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:27,806 INFO L82 PathProgramCache]: Analyzing trace with hash 198236733, now seen corresponding path program 26 times [2020-12-22 04:52:27,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:27,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957926139] [2020-12-22 04:52:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:30,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957926139] [2020-12-22 04:52:30,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998469766] [2020-12-22 04:52:30,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:30,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:52:30,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:30,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:52:30,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:30,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:52:32,578 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:52:32,642 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:52:32,644 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:52:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:34,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:34,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 68 [2020-12-22 04:52:34,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866265281] [2020-12-22 04:52:34,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 04:52:34,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:34,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 04:52:34,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=860, Invalid=3696, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:52:34,350 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 68 states.