/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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:23:26,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:23:26,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:23:26,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:23:26,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:23:26,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:23:26,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:23:26,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:23:26,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:23:26,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:23:26,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:23:26,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:23:26,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:23:26,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:23:26,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:23:26,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:23:26,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:23:26,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:23:26,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:23:26,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:23:26,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:23:26,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:23:26,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:23:26,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:23:26,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:23:26,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:23:26,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:23:26,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:23:26,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:23:26,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:23:26,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:23:26,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:23:26,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:23:26,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:23:26,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:23:26,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:23:26,238 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:23:26,265 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:23:26,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:23:26,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:23:26,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:23:26,268 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:23:26,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:23:26,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:23:26,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:23:26,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:23:26,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:23:26,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:23:26,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:23:26,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:23:26,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:23:26,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:23:26,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:23:26,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:23:26,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:23:26,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:23:26,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:23:26,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:23:26,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:23:26,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:23:26,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:23:26,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:23:26,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:23:26,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:23:26,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:23:26,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:23:26,668 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:23:26,671 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:23:26,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:23:26,742 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ecce9190/4ccbe8aa1eca46c5a09c161defbab36f/FLAGaed3a135d [2020-12-22 08:23:27,378 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:23:27,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:23:27,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ecce9190/4ccbe8aa1eca46c5a09c161defbab36f/FLAGaed3a135d [2020-12-22 08:23:27,706 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ecce9190/4ccbe8aa1eca46c5a09c161defbab36f [2020-12-22 08:23:27,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:23:27,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:23:27,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:23:27,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:23:27,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:23:27,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:23:27" (1/1) ... [2020-12-22 08:23:27,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b58396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:27, skipping insertion in model container [2020-12-22 08:23:27,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:23:27" (1/1) ... [2020-12-22 08:23:27,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:23:27,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:23:28,011 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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4935,4948] [2020-12-22 08:23:28,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:23:28,083 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:23:28,125 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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4935,4948] [2020-12-22 08:23:28,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:23:28,170 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:23:28,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:28 WrapperNode [2020-12-22 08:23:28,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:23:28,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:23:28,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:23:28,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:23:28,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:28" (1/1) ... [2020-12-22 08:23:28,196 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:28" (1/1) ... [2020-12-22 08:23:28,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:23:28,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:23:28,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:23:28,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:23:28,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:28" (1/1) ... [2020-12-22 08:23:28,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:28" (1/1) ... [2020-12-22 08:23:28,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:28" (1/1) ... [2020-12-22 08:23:28,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:28" (1/1) ... [2020-12-22 08:23:28,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:28" (1/1) ... [2020-12-22 08:23:28,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:28" (1/1) ... [2020-12-22 08:23:28,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:28" (1/1) ... [2020-12-22 08:23:28,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:23:28,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:23:28,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:23:28,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:23:28,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:28" (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 08:23:28,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:23:28,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:23:28,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:23:28,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:23:29,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:23:29,151 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:23:29,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:23:29 BoogieIcfgContainer [2020-12-22 08:23:29,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:23:29,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:23:29,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:23:29,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:23:29,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:23:27" (1/3) ... [2020-12-22 08:23:29,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca59d4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:23:29, skipping insertion in model container [2020-12-22 08:23:29,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:28" (2/3) ... [2020-12-22 08:23:29,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca59d4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:23:29, skipping insertion in model container [2020-12-22 08:23:29,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:23:29" (3/3) ... [2020-12-22 08:23:29,163 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:23:29,170 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:23:29,176 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:23:29,195 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:23:29,225 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:23:29,225 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:23:29,226 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:23:29,226 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:23:29,226 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:23:29,226 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:23:29,226 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:23:29,226 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:23:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-12-22 08:23:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 08:23:29,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:29,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:29,256 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:29,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:29,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1289871298, now seen corresponding path program 1 times [2020-12-22 08:23:29,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:29,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112468376] [2020-12-22 08:23:29,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:29,687 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 08:23:29,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112468376] [2020-12-22 08:23:29,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:29,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:29,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408780195] [2020-12-22 08:23:29,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:29,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:29,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:29,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:29,712 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-12-22 08:23:29,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:29,788 INFO L93 Difference]: Finished difference Result 250 states and 403 transitions. [2020-12-22 08:23:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:29,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 08:23:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:29,805 INFO L225 Difference]: With dead ends: 250 [2020-12-22 08:23:29,805 INFO L226 Difference]: Without dead ends: 166 [2020-12-22 08:23:29,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:29,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-22 08:23:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-12-22 08:23:29,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-22 08:23:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 245 transitions. [2020-12-22 08:23:29,885 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 245 transitions. Word has length 48 [2020-12-22 08:23:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:29,885 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 245 transitions. [2020-12-22 08:23:29,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:23:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 245 transitions. [2020-12-22 08:23:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 08:23:29,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:29,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:29,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:23:29,889 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:29,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:29,890 INFO L82 PathProgramCache]: Analyzing trace with hash 809542357, now seen corresponding path program 1 times [2020-12-22 08:23:29,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:29,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554118529] [2020-12-22 08:23:29,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:30,015 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 08:23:30,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554118529] [2020-12-22 08:23:30,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:30,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:30,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167833653] [2020-12-22 08:23:30,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:30,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:30,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:30,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:30,019 INFO L87 Difference]: Start difference. First operand 164 states and 245 transitions. Second operand 3 states. [2020-12-22 08:23:30,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:30,070 INFO L93 Difference]: Finished difference Result 406 states and 629 transitions. [2020-12-22 08:23:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:30,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 08:23:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:30,074 INFO L225 Difference]: With dead ends: 406 [2020-12-22 08:23:30,074 INFO L226 Difference]: Without dead ends: 269 [2020-12-22 08:23:30,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-22 08:23:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 267. [2020-12-22 08:23:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-22 08:23:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 408 transitions. [2020-12-22 08:23:30,133 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 408 transitions. Word has length 48 [2020-12-22 08:23:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:30,134 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 408 transitions. [2020-12-22 08:23:30,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:23:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 408 transitions. [2020-12-22 08:23:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:23:30,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:30,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:30,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:23:30,138 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:30,140 INFO L82 PathProgramCache]: Analyzing trace with hash 981236370, now seen corresponding path program 1 times [2020-12-22 08:23:30,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:30,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929013670] [2020-12-22 08:23:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:30,264 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 08:23:30,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929013670] [2020-12-22 08:23:30,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:30,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:30,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093603290] [2020-12-22 08:23:30,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:30,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:30,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:30,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:30,267 INFO L87 Difference]: Start difference. First operand 267 states and 408 transitions. Second operand 3 states. [2020-12-22 08:23:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:30,319 INFO L93 Difference]: Finished difference Result 683 states and 1066 transitions. [2020-12-22 08:23:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:30,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 08:23:30,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:30,328 INFO L225 Difference]: With dead ends: 683 [2020-12-22 08:23:30,329 INFO L226 Difference]: Without dead ends: 443 [2020-12-22 08:23:30,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:30,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-12-22 08:23:30,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 441. [2020-12-22 08:23:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-12-22 08:23:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 680 transitions. [2020-12-22 08:23:30,401 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 680 transitions. Word has length 49 [2020-12-22 08:23:30,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:30,401 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 680 transitions. [2020-12-22 08:23:30,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:23:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 680 transitions. [2020-12-22 08:23:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:23:30,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:30,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:30,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:23:30,404 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:30,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1328032366, now seen corresponding path program 1 times [2020-12-22 08:23:30,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:30,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818241551] [2020-12-22 08:23:30,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:30,500 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 08:23:30,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818241551] [2020-12-22 08:23:30,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:30,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:30,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263991657] [2020-12-22 08:23:30,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:30,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:30,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:30,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:30,503 INFO L87 Difference]: Start difference. First operand 441 states and 680 transitions. Second operand 3 states. [2020-12-22 08:23:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:30,608 INFO L93 Difference]: Finished difference Result 1141 states and 1778 transitions. [2020-12-22 08:23:30,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:30,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 08:23:30,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:30,613 INFO L225 Difference]: With dead ends: 1141 [2020-12-22 08:23:30,613 INFO L226 Difference]: Without dead ends: 727 [2020-12-22 08:23:30,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:30,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2020-12-22 08:23:30,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 725. [2020-12-22 08:23:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2020-12-22 08:23:30,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1116 transitions. [2020-12-22 08:23:30,662 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1116 transitions. Word has length 50 [2020-12-22 08:23:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:30,663 INFO L481 AbstractCegarLoop]: Abstraction has 725 states and 1116 transitions. [2020-12-22 08:23:30,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:23:30,663 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1116 transitions. [2020-12-22 08:23:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:23:30,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:30,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:30,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:23:30,666 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:30,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:30,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1540305433, now seen corresponding path program 1 times [2020-12-22 08:23:30,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:30,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051745352] [2020-12-22 08:23:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:30,884 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 08:23:30,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051745352] [2020-12-22 08:23:30,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:30,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:23:30,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300211125] [2020-12-22 08:23:30,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:23:30,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:30,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:23:30,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:30,889 INFO L87 Difference]: Start difference. First operand 725 states and 1116 transitions. Second operand 6 states. [2020-12-22 08:23:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:31,204 INFO L93 Difference]: Finished difference Result 3109 states and 4800 transitions. [2020-12-22 08:23:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:23:31,206 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-22 08:23:31,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:31,223 INFO L225 Difference]: With dead ends: 3109 [2020-12-22 08:23:31,223 INFO L226 Difference]: Without dead ends: 2411 [2020-12-22 08:23:31,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 08:23:31,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2020-12-22 08:23:31,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2405. [2020-12-22 08:23:31,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2405 states. [2020-12-22 08:23:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 3692 transitions. [2020-12-22 08:23:31,445 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 3692 transitions. Word has length 51 [2020-12-22 08:23:31,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:31,447 INFO L481 AbstractCegarLoop]: Abstraction has 2405 states and 3692 transitions. [2020-12-22 08:23:31,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:23:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 3692 transitions. [2020-12-22 08:23:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:23:31,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:31,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:31,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:23:31,453 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:31,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:31,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1674240080, now seen corresponding path program 1 times [2020-12-22 08:23:31,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:31,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367694514] [2020-12-22 08:23:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:31,579 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 08:23:31,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367694514] [2020-12-22 08:23:31,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:31,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:23:31,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066625974] [2020-12-22 08:23:31,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:23:31,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:31,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:23:31,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:31,583 INFO L87 Difference]: Start difference. First operand 2405 states and 3692 transitions. Second operand 6 states. [2020-12-22 08:23:32,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:32,329 INFO L93 Difference]: Finished difference Result 9371 states and 14399 transitions. [2020-12-22 08:23:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:23:32,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 08:23:32,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:32,369 INFO L225 Difference]: With dead ends: 9371 [2020-12-22 08:23:32,369 INFO L226 Difference]: Without dead ends: 6993 [2020-12-22 08:23:32,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:23:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6993 states. [2020-12-22 08:23:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6993 to 6989. [2020-12-22 08:23:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6989 states. [2020-12-22 08:23:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6989 states to 6989 states and 10684 transitions. [2020-12-22 08:23:32,953 INFO L78 Accepts]: Start accepts. Automaton has 6989 states and 10684 transitions. Word has length 53 [2020-12-22 08:23:32,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:32,953 INFO L481 AbstractCegarLoop]: Abstraction has 6989 states and 10684 transitions. [2020-12-22 08:23:32,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:23:32,953 INFO L276 IsEmpty]: Start isEmpty. Operand 6989 states and 10684 transitions. [2020-12-22 08:23:32,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:23:32,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:32,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:32,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:23:32,956 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:32,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:32,957 INFO L82 PathProgramCache]: Analyzing trace with hash 100603883, now seen corresponding path program 1 times [2020-12-22 08:23:32,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:32,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809547302] [2020-12-22 08:23:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:33,101 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 08:23:33,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809547302] [2020-12-22 08:23:33,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:33,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:23:33,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665646095] [2020-12-22 08:23:33,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:23:33,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:33,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:23:33,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:33,104 INFO L87 Difference]: Start difference. First operand 6989 states and 10684 transitions. Second operand 6 states. [2020-12-22 08:23:34,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:34,751 INFO L93 Difference]: Finished difference Result 31855 states and 48729 transitions. [2020-12-22 08:23:34,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:23:34,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 08:23:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:34,880 INFO L225 Difference]: With dead ends: 31855 [2020-12-22 08:23:34,880 INFO L226 Difference]: Without dead ends: 24893 [2020-12-22 08:23:34,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:23:34,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24893 states. [2020-12-22 08:23:36,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24893 to 13949. [2020-12-22 08:23:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13949 states. [2020-12-22 08:23:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13949 states to 13949 states and 20956 transitions. [2020-12-22 08:23:36,160 INFO L78 Accepts]: Start accepts. Automaton has 13949 states and 20956 transitions. Word has length 53 [2020-12-22 08:23:36,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:36,162 INFO L481 AbstractCegarLoop]: Abstraction has 13949 states and 20956 transitions. [2020-12-22 08:23:36,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:23:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 13949 states and 20956 transitions. [2020-12-22 08:23:36,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:23:36,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:36,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:36,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:23:36,165 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:36,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:36,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1195703203, now seen corresponding path program 1 times [2020-12-22 08:23:36,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:36,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779338413] [2020-12-22 08:23:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:36,249 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 08:23:36,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779338413] [2020-12-22 08:23:36,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:36,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:23:36,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874078917] [2020-12-22 08:23:36,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:23:36,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:36,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:23:36,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:23:36,252 INFO L87 Difference]: Start difference. First operand 13949 states and 20956 transitions. Second operand 5 states. [2020-12-22 08:23:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:38,015 INFO L93 Difference]: Finished difference Result 28639 states and 42653 transitions. [2020-12-22 08:23:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:23:38,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:23:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:38,098 INFO L225 Difference]: With dead ends: 28639 [2020-12-22 08:23:38,099 INFO L226 Difference]: Without dead ends: 28637 [2020-12-22 08:23:38,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28637 states. [2020-12-22 08:23:39,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28637 to 14717. [2020-12-22 08:23:39,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14717 states. [2020-12-22 08:23:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14717 states to 14717 states and 21724 transitions. [2020-12-22 08:23:39,583 INFO L78 Accepts]: Start accepts. Automaton has 14717 states and 21724 transitions. Word has length 54 [2020-12-22 08:23:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:39,583 INFO L481 AbstractCegarLoop]: Abstraction has 14717 states and 21724 transitions. [2020-12-22 08:23:39,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:23:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 14717 states and 21724 transitions. [2020-12-22 08:23:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:23:39,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:39,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:39,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:23:39,585 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:39,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:39,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1598479419, now seen corresponding path program 1 times [2020-12-22 08:23:39,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:39,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609222723] [2020-12-22 08:23:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:39,635 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 08:23:39,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609222723] [2020-12-22 08:23:39,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:39,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:39,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405809005] [2020-12-22 08:23:39,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:39,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:39,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:39,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:39,637 INFO L87 Difference]: Start difference. First operand 14717 states and 21724 transitions. Second operand 3 states. [2020-12-22 08:23:40,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:40,898 INFO L93 Difference]: Finished difference Result 35623 states and 52544 transitions. [2020-12-22 08:23:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:40,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 08:23:40,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:40,951 INFO L225 Difference]: With dead ends: 35623 [2020-12-22 08:23:40,951 INFO L226 Difference]: Without dead ends: 20933 [2020-12-22 08:23:40,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20933 states. [2020-12-22 08:23:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20933 to 20931. [2020-12-22 08:23:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20931 states. [2020-12-22 08:23:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20931 states to 20931 states and 30678 transitions. [2020-12-22 08:23:42,525 INFO L78 Accepts]: Start accepts. Automaton has 20931 states and 30678 transitions. Word has length 55 [2020-12-22 08:23:42,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:42,525 INFO L481 AbstractCegarLoop]: Abstraction has 20931 states and 30678 transitions. [2020-12-22 08:23:42,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:23:42,525 INFO L276 IsEmpty]: Start isEmpty. Operand 20931 states and 30678 transitions. [2020-12-22 08:23:42,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 08:23:42,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:42,535 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:42,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:23:42,535 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:42,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:42,536 INFO L82 PathProgramCache]: Analyzing trace with hash -517305580, now seen corresponding path program 1 times [2020-12-22 08:23:42,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:42,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226077085] [2020-12-22 08:23:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:23:42,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226077085] [2020-12-22 08:23:42,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679702511] [2020-12-22 08:23:42,660 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 08:23:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:42,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 08:23:42,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:23:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:23:42,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:23:42,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2020-12-22 08:23:42,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815401692] [2020-12-22 08:23:42,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:23:42,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:42,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:23:42,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:23:42,978 INFO L87 Difference]: Start difference. First operand 20931 states and 30678 transitions. Second operand 7 states. [2020-12-22 08:23:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:45,351 INFO L93 Difference]: Finished difference Result 51898 states and 76348 transitions. [2020-12-22 08:23:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:23:45,352 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-12-22 08:23:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:45,429 INFO L225 Difference]: With dead ends: 51898 [2020-12-22 08:23:45,429 INFO L226 Difference]: Without dead ends: 37208 [2020-12-22 08:23:45,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:23:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37208 states. [2020-12-22 08:23:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37208 to 34755. [2020-12-22 08:23:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34755 states. [2020-12-22 08:23:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34755 states to 34755 states and 50646 transitions. [2020-12-22 08:23:48,189 INFO L78 Accepts]: Start accepts. Automaton has 34755 states and 50646 transitions. Word has length 76 [2020-12-22 08:23:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:48,190 INFO L481 AbstractCegarLoop]: Abstraction has 34755 states and 50646 transitions. [2020-12-22 08:23:48,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:23:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 34755 states and 50646 transitions. [2020-12-22 08:23:48,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:23:48,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:48,203 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:48,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 08:23:48,419 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:48,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:48,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1873970904, now seen corresponding path program 1 times [2020-12-22 08:23:48,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:48,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453414095] [2020-12-22 08:23:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:23:48,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453414095] [2020-12-22 08:23:48,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:48,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:23:48,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407916423] [2020-12-22 08:23:48,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:23:48,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:48,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:23:48,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:48,533 INFO L87 Difference]: Start difference. First operand 34755 states and 50646 transitions. Second operand 6 states. [2020-12-22 08:23:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:52,558 INFO L93 Difference]: Finished difference Result 73585 states and 107975 transitions. [2020-12-22 08:23:52,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:23:52,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-12-22 08:23:52,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:52,643 INFO L225 Difference]: With dead ends: 73585 [2020-12-22 08:23:52,643 INFO L226 Difference]: Without dead ends: 59683 [2020-12-22 08:23:52,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:23:52,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59683 states. [2020-12-22 08:23:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59683 to 47259. [2020-12-22 08:23:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47259 states. [2020-12-22 08:23:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47259 states to 47259 states and 68750 transitions. [2020-12-22 08:23:56,457 INFO L78 Accepts]: Start accepts. Automaton has 47259 states and 68750 transitions. Word has length 77 [2020-12-22 08:23:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:56,457 INFO L481 AbstractCegarLoop]: Abstraction has 47259 states and 68750 transitions. [2020-12-22 08:23:56,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:23:56,457 INFO L276 IsEmpty]: Start isEmpty. Operand 47259 states and 68750 transitions. [2020-12-22 08:23:56,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:23:56,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:56,466 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:56,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:23:56,467 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1469487211, now seen corresponding path program 1 times [2020-12-22 08:23:56,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:56,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937985305] [2020-12-22 08:23:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:56,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937985305] [2020-12-22 08:23:56,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:56,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:56,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473511410] [2020-12-22 08:23:56,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:56,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:56,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:56,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:56,525 INFO L87 Difference]: Start difference. First operand 47259 states and 68750 transitions. Second operand 3 states. [2020-12-22 08:24:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:00,871 INFO L93 Difference]: Finished difference Result 93173 states and 135316 transitions. [2020-12-22 08:24:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:00,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 08:24:00,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:00,953 INFO L225 Difference]: With dead ends: 93173 [2020-12-22 08:24:00,954 INFO L226 Difference]: Without dead ends: 65067 [2020-12-22 08:24:00,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65067 states. [2020-12-22 08:24:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65067 to 61413. [2020-12-22 08:24:05,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61413 states. [2020-12-22 08:24:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61413 states to 61413 states and 88134 transitions. [2020-12-22 08:24:05,526 INFO L78 Accepts]: Start accepts. Automaton has 61413 states and 88134 transitions. Word has length 77 [2020-12-22 08:24:05,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:05,526 INFO L481 AbstractCegarLoop]: Abstraction has 61413 states and 88134 transitions. [2020-12-22 08:24:05,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 61413 states and 88134 transitions. [2020-12-22 08:24:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:24:05,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:05,536 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:05,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:24:05,537 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:05,537 INFO L82 PathProgramCache]: Analyzing trace with hash 948797308, now seen corresponding path program 1 times [2020-12-22 08:24:05,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:05,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095381760] [2020-12-22 08:24:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:05,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095381760] [2020-12-22 08:24:05,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:05,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:05,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203398957] [2020-12-22 08:24:05,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:05,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:05,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:05,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:05,592 INFO L87 Difference]: Start difference. First operand 61413 states and 88134 transitions. Second operand 3 states. [2020-12-22 08:24:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:11,134 INFO L93 Difference]: Finished difference Result 97958 states and 139871 transitions. [2020-12-22 08:24:11,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:11,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 08:24:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:11,203 INFO L225 Difference]: With dead ends: 97958 [2020-12-22 08:24:11,203 INFO L226 Difference]: Without dead ends: 63820 [2020-12-22 08:24:11,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:11,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63820 states. [2020-12-22 08:24:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63820 to 61182. [2020-12-22 08:24:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61182 states. [2020-12-22 08:24:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61182 states to 61182 states and 86280 transitions. [2020-12-22 08:24:16,072 INFO L78 Accepts]: Start accepts. Automaton has 61182 states and 86280 transitions. Word has length 77 [2020-12-22 08:24:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:16,072 INFO L481 AbstractCegarLoop]: Abstraction has 61182 states and 86280 transitions. [2020-12-22 08:24:16,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 61182 states and 86280 transitions. [2020-12-22 08:24:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:24:16,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:16,081 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:16,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:24:16,082 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:16,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:16,082 INFO L82 PathProgramCache]: Analyzing trace with hash -231517371, now seen corresponding path program 1 times [2020-12-22 08:24:16,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:16,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253531041] [2020-12-22 08:24:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:16,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253531041] [2020-12-22 08:24:16,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:16,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:16,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784688438] [2020-12-22 08:24:16,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:16,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:16,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:16,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:16,136 INFO L87 Difference]: Start difference. First operand 61182 states and 86280 transitions. Second operand 3 states. [2020-12-22 08:24:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:23,861 INFO L93 Difference]: Finished difference Result 163292 states and 229765 transitions. [2020-12-22 08:24:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:23,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 08:24:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:24,001 INFO L225 Difference]: With dead ends: 163292 [2020-12-22 08:24:24,001 INFO L226 Difference]: Without dead ends: 109481 [2020-12-22 08:24:24,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109481 states. [2020-12-22 08:24:31,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109481 to 109325. [2020-12-22 08:24:31,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109325 states. [2020-12-22 08:24:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109325 states to 109325 states and 152069 transitions. [2020-12-22 08:24:32,113 INFO L78 Accepts]: Start accepts. Automaton has 109325 states and 152069 transitions. Word has length 77 [2020-12-22 08:24:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:32,113 INFO L481 AbstractCegarLoop]: Abstraction has 109325 states and 152069 transitions. [2020-12-22 08:24:32,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 109325 states and 152069 transitions. [2020-12-22 08:24:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:24:32,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:32,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:32,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:24:32,126 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:32,126 INFO L82 PathProgramCache]: Analyzing trace with hash 561359425, now seen corresponding path program 1 times [2020-12-22 08:24:32,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:32,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341578769] [2020-12-22 08:24:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:24:32,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341578769] [2020-12-22 08:24:32,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:32,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:24:32,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948966250] [2020-12-22 08:24:32,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:32,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:32,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:32,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:32,204 INFO L87 Difference]: Start difference. First operand 109325 states and 152069 transitions. Second operand 6 states. [2020-12-22 08:24:52,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:52,428 INFO L93 Difference]: Finished difference Result 379889 states and 526364 transitions. [2020-12-22 08:24:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:24:52,428 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-12-22 08:24:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:53,108 INFO L225 Difference]: With dead ends: 379889 [2020-12-22 08:24:53,109 INFO L226 Difference]: Without dead ends: 270683 [2020-12-22 08:24:53,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:24:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270683 states. [2020-12-22 08:25:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270683 to 266366. [2020-12-22 08:25:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266366 states. [2020-12-22 08:25:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266366 states to 266366 states and 367724 transitions. [2020-12-22 08:25:14,722 INFO L78 Accepts]: Start accepts. Automaton has 266366 states and 367724 transitions. Word has length 77 [2020-12-22 08:25:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:14,728 INFO L481 AbstractCegarLoop]: Abstraction has 266366 states and 367724 transitions. [2020-12-22 08:25:14,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:25:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 266366 states and 367724 transitions. [2020-12-22 08:25:14,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:25:14,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:14,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:14,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:25:14,740 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:14,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:14,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2080317244, now seen corresponding path program 1 times [2020-12-22 08:25:14,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:14,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011750976] [2020-12-22 08:25:14,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 08:25:14,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011750976] [2020-12-22 08:25:14,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:14,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:25:14,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963070963] [2020-12-22 08:25:14,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:25:14,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:14,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:25:14,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:14,841 INFO L87 Difference]: Start difference. First operand 266366 states and 367724 transitions. Second operand 6 states.