/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/eca-rers2012/Problem14_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 01:53:00,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 01:53:00,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 01:53:00,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 01:53:00,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 01:53:00,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 01:53:00,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 01:53:00,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 01:53:00,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 01:53:00,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 01:53:00,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 01:53:00,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 01:53:00,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 01:53:00,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 01:53:00,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 01:53:00,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 01:53:00,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 01:53:00,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 01:53:00,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 01:53:00,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 01:53:00,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 01:53:00,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 01:53:00,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 01:53:00,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 01:53:00,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 01:53:00,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 01:53:00,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 01:53:00,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 01:53:00,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 01:53:00,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 01:53:00,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 01:53:00,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 01:53:00,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 01:53:00,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 01:53:00,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 01:53:00,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 01:53:00,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 01:53:00,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 01:53:00,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 01:53:00,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 01:53:00,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 01:53:00,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 01:53:00,330 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 01:53:00,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 01:53:00,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 01:53:00,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 01:53:00,338 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 01:53:00,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 01:53:00,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 01:53:00,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 01:53:00,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 01:53:00,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 01:53:00,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 01:53:00,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 01:53:00,342 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 01:53:00,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 01:53:00,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 01:53:00,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 01:53:00,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 01:53:00,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:53:00,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 01:53:00,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 01:53:00,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 01:53:00,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 01:53:00,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 01:53:00,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 01:53:00,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 01:53:00,345 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 01:53:00,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 01:53:00,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 01:53:00,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 01:53:00,876 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 01:53:00,876 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 01:53:00,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem14_label14.c [2020-12-22 01:53:01,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fddf511d/377ed52f371c49fd97f2ed9f30a9af6c/FLAG414d4caa2 [2020-12-22 01:53:01,873 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 01:53:01,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label14.c [2020-12-22 01:53:01,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fddf511d/377ed52f371c49fd97f2ed9f30a9af6c/FLAG414d4caa2 [2020-12-22 01:53:02,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fddf511d/377ed52f371c49fd97f2ed9f30a9af6c [2020-12-22 01:53:02,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 01:53:02,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 01:53:02,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 01:53:02,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 01:53:02,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 01:53:02,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:53:02" (1/1) ... [2020-12-22 01:53:02,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c383357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:02, skipping insertion in model container [2020-12-22 01:53:02,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:53:02" (1/1) ... [2020-12-22 01:53:02,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 01:53:02,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 01:53:02,406 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/eca-rers2012/Problem14_label14.c[2862,2875] [2020-12-22 01:53:02,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:53:02,795 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 01:53:02,820 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/eca-rers2012/Problem14_label14.c[2862,2875] [2020-12-22 01:53:03,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:53:03,073 INFO L208 MainTranslator]: Completed translation [2020-12-22 01:53:03,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:03 WrapperNode [2020-12-22 01:53:03,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 01:53:03,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 01:53:03,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 01:53:03,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 01:53:03,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:03" (1/1) ... [2020-12-22 01:53:03,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:03" (1/1) ... [2020-12-22 01:53:03,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 01:53:03,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 01:53:03,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 01:53:03,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 01:53:03,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:03" (1/1) ... [2020-12-22 01:53:03,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:03" (1/1) ... [2020-12-22 01:53:03,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:03" (1/1) ... [2020-12-22 01:53:03,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:03" (1/1) ... [2020-12-22 01:53:03,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:03" (1/1) ... [2020-12-22 01:53:03,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:03" (1/1) ... [2020-12-22 01:53:03,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:03" (1/1) ... [2020-12-22 01:53:03,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 01:53:03,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 01:53:03,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 01:53:03,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 01:53:03,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:03" (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 01:53:03,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 01:53:03,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 01:53:03,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 01:53:03,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 01:53:05,332 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 01:53:05,332 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 01:53:05,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:53:05 BoogieIcfgContainer [2020-12-22 01:53:05,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 01:53:05,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 01:53:05,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 01:53:05,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 01:53:05,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:53:02" (1/3) ... [2020-12-22 01:53:05,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf3bd83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:53:05, skipping insertion in model container [2020-12-22 01:53:05,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:03" (2/3) ... [2020-12-22 01:53:05,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf3bd83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:53:05, skipping insertion in model container [2020-12-22 01:53:05,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:53:05" (3/3) ... [2020-12-22 01:53:05,347 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label14.c [2020-12-22 01:53:05,355 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 01:53:05,362 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 01:53:05,387 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 01:53:05,421 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 01:53:05,421 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 01:53:05,422 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 01:53:05,422 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 01:53:05,422 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 01:53:05,422 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 01:53:05,422 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 01:53:05,422 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 01:53:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states. [2020-12-22 01:53:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 01:53:05,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:05,465 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] [2020-12-22 01:53:05,466 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:05,476 INFO L82 PathProgramCache]: Analyzing trace with hash 678582746, now seen corresponding path program 1 times [2020-12-22 01:53:05,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:05,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913204776] [2020-12-22 01:53:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:05,920 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 01:53:05,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913204776] [2020-12-22 01:53:05,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:05,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:53:05,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025658340] [2020-12-22 01:53:05,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:05,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:05,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:05,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:53:05,969 INFO L87 Difference]: Start difference. First operand 245 states. Second operand 3 states. [2020-12-22 01:53:07,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:07,518 INFO L93 Difference]: Finished difference Result 669 states and 1200 transitions. [2020-12-22 01:53:07,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:07,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-22 01:53:07,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:07,542 INFO L225 Difference]: With dead ends: 669 [2020-12-22 01:53:07,542 INFO L226 Difference]: Without dead ends: 360 [2020-12-22 01:53:07,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 01:53:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-12-22 01:53:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2020-12-22 01:53:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-12-22 01:53:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 588 transitions. [2020-12-22 01:53:07,668 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 588 transitions. Word has length 26 [2020-12-22 01:53:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:07,669 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 588 transitions. [2020-12-22 01:53:07,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 588 transitions. [2020-12-22 01:53:07,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 01:53:07,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:07,680 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:53:07,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 01:53:07,683 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:07,685 INFO L82 PathProgramCache]: Analyzing trace with hash 321162416, now seen corresponding path program 1 times [2020-12-22 01:53:07,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:07,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661933775] [2020-12-22 01:53:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:53:07,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661933775] [2020-12-22 01:53:07,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:07,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:53:07,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664082740] [2020-12-22 01:53:07,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:07,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:07,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:07,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:53:07,967 INFO L87 Difference]: Start difference. First operand 360 states and 588 transitions. Second operand 3 states. [2020-12-22 01:53:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:09,184 INFO L93 Difference]: Finished difference Result 1074 states and 1759 transitions. [2020-12-22 01:53:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:09,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 01:53:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:09,193 INFO L225 Difference]: With dead ends: 1074 [2020-12-22 01:53:09,193 INFO L226 Difference]: Without dead ends: 716 [2020-12-22 01:53:09,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 01:53:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-12-22 01:53:09,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2020-12-22 01:53:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2020-12-22 01:53:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1089 transitions. [2020-12-22 01:53:09,258 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1089 transitions. Word has length 91 [2020-12-22 01:53:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:09,259 INFO L481 AbstractCegarLoop]: Abstraction has 716 states and 1089 transitions. [2020-12-22 01:53:09,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:09,260 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1089 transitions. [2020-12-22 01:53:09,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 01:53:09,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:09,263 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:53:09,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 01:53:09,264 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:09,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:09,267 INFO L82 PathProgramCache]: Analyzing trace with hash -974947575, now seen corresponding path program 1 times [2020-12-22 01:53:09,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:09,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165355881] [2020-12-22 01:53:09,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:53:09,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165355881] [2020-12-22 01:53:09,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:09,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:53:09,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067754378] [2020-12-22 01:53:09,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:09,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:09,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:09,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:53:09,512 INFO L87 Difference]: Start difference. First operand 716 states and 1089 transitions. Second operand 3 states. [2020-12-22 01:53:10,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:10,676 INFO L93 Difference]: Finished difference Result 1786 states and 2718 transitions. [2020-12-22 01:53:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:10,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-12-22 01:53:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:10,685 INFO L225 Difference]: With dead ends: 1786 [2020-12-22 01:53:10,686 INFO L226 Difference]: Without dead ends: 1072 [2020-12-22 01:53:10,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 01:53:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2020-12-22 01:53:10,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2020-12-22 01:53:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1072 states. [2020-12-22 01:53:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1475 transitions. [2020-12-22 01:53:10,719 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1475 transitions. Word has length 92 [2020-12-22 01:53:10,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:10,720 INFO L481 AbstractCegarLoop]: Abstraction has 1072 states and 1475 transitions. [2020-12-22 01:53:10,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1475 transitions. [2020-12-22 01:53:10,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 01:53:10,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:10,723 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:53:10,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 01:53:10,723 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:10,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:10,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1697536284, now seen corresponding path program 1 times [2020-12-22 01:53:10,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:10,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11457417] [2020-12-22 01:53:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:53:10,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11457417] [2020-12-22 01:53:10,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:10,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:53:10,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716666433] [2020-12-22 01:53:10,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:10,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:10,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:10,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:53:10,850 INFO L87 Difference]: Start difference. First operand 1072 states and 1475 transitions. Second operand 3 states. [2020-12-22 01:53:11,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:11,822 INFO L93 Difference]: Finished difference Result 2854 states and 3878 transitions. [2020-12-22 01:53:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:11,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 01:53:11,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:11,842 INFO L225 Difference]: With dead ends: 2854 [2020-12-22 01:53:11,843 INFO L226 Difference]: Without dead ends: 1784 [2020-12-22 01:53:11,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 01:53:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2020-12-22 01:53:11,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1428. [2020-12-22 01:53:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1428 states. [2020-12-22 01:53:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1873 transitions. [2020-12-22 01:53:11,889 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1873 transitions. Word has length 94 [2020-12-22 01:53:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:11,890 INFO L481 AbstractCegarLoop]: Abstraction has 1428 states and 1873 transitions. [2020-12-22 01:53:11,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1873 transitions. [2020-12-22 01:53:11,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 01:53:11,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:11,898 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:53:11,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 01:53:11,899 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:11,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:11,900 INFO L82 PathProgramCache]: Analyzing trace with hash -256152627, now seen corresponding path program 1 times [2020-12-22 01:53:11,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:11,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140517230] [2020-12-22 01:53:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:53:12,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140517230] [2020-12-22 01:53:12,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:12,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:53:12,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929369602] [2020-12-22 01:53:12,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:53:12,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:12,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:53:12,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:53:12,171 INFO L87 Difference]: Start difference. First operand 1428 states and 1873 transitions. Second operand 4 states. [2020-12-22 01:53:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:13,907 INFO L93 Difference]: Finished difference Result 3388 states and 4344 transitions. [2020-12-22 01:53:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:53:13,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 01:53:13,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:13,920 INFO L225 Difference]: With dead ends: 3388 [2020-12-22 01:53:13,921 INFO L226 Difference]: Without dead ends: 1962 [2020-12-22 01:53:13,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:53:13,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2020-12-22 01:53:13,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1784. [2020-12-22 01:53:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1784 states. [2020-12-22 01:53:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2247 transitions. [2020-12-22 01:53:13,974 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2247 transitions. Word has length 105 [2020-12-22 01:53:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:13,974 INFO L481 AbstractCegarLoop]: Abstraction has 1784 states and 2247 transitions. [2020-12-22 01:53:13,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:53:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2247 transitions. [2020-12-22 01:53:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-22 01:53:13,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:13,978 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:53:13,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 01:53:13,979 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:13,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:13,979 INFO L82 PathProgramCache]: Analyzing trace with hash 592580129, now seen corresponding path program 1 times [2020-12-22 01:53:13,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:13,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750462903] [2020-12-22 01:53:13,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:53:14,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750462903] [2020-12-22 01:53:14,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:14,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:53:14,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255040540] [2020-12-22 01:53:14,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:53:14,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:14,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:53:14,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:53:14,255 INFO L87 Difference]: Start difference. First operand 1784 states and 2247 transitions. Second operand 4 states. [2020-12-22 01:53:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:15,586 INFO L93 Difference]: Finished difference Result 3773 states and 4735 transitions. [2020-12-22 01:53:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:53:15,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 185 [2020-12-22 01:53:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:15,602 INFO L225 Difference]: With dead ends: 3773 [2020-12-22 01:53:15,602 INFO L226 Difference]: Without dead ends: 2140 [2020-12-22 01:53:15,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:53:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2020-12-22 01:53:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140. [2020-12-22 01:53:15,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2140 states. [2020-12-22 01:53:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2434 transitions. [2020-12-22 01:53:15,661 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2434 transitions. Word has length 185 [2020-12-22 01:53:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:15,661 INFO L481 AbstractCegarLoop]: Abstraction has 2140 states and 2434 transitions. [2020-12-22 01:53:15,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:53:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2434 transitions. [2020-12-22 01:53:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-12-22 01:53:15,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:15,667 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:53:15,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 01:53:15,668 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1648638209, now seen corresponding path program 1 times [2020-12-22 01:53:15,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:15,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912864617] [2020-12-22 01:53:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 182 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:53:16,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912864617] [2020-12-22 01:53:16,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108059304] [2020-12-22 01:53:16,290 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 01:53:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:16,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 01:53:16,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:53:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-12-22 01:53:17,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:53:17,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2020-12-22 01:53:17,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235268664] [2020-12-22 01:53:17,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:53:17,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:17,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:53:17,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 01:53:17,620 INFO L87 Difference]: Start difference. First operand 2140 states and 2434 transitions. Second operand 4 states. [2020-12-22 01:53:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:18,966 INFO L93 Difference]: Finished difference Result 4100 states and 4687 transitions. [2020-12-22 01:53:18,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:53:18,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 306 [2020-12-22 01:53:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:18,978 INFO L225 Difference]: With dead ends: 4100 [2020-12-22 01:53:18,978 INFO L226 Difference]: Without dead ends: 2140 [2020-12-22 01:53:18,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 01:53:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2020-12-22 01:53:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140. [2020-12-22 01:53:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2140 states. [2020-12-22 01:53:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2415 transitions. [2020-12-22 01:53:19,054 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2415 transitions. Word has length 306 [2020-12-22 01:53:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:19,055 INFO L481 AbstractCegarLoop]: Abstraction has 2140 states and 2415 transitions. [2020-12-22 01:53:19,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:53:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2415 transitions. [2020-12-22 01:53:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-12-22 01:53:19,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:19,062 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:53:19,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 01:53:19,277 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:19,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:19,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1444073114, now seen corresponding path program 1 times [2020-12-22 01:53:19,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:19,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836570631] [2020-12-22 01:53:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-12-22 01:53:19,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836570631] [2020-12-22 01:53:19,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:19,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:53:19,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352584239] [2020-12-22 01:53:19,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:19,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:19,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:19,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:53:19,689 INFO L87 Difference]: Start difference. First operand 2140 states and 2415 transitions. Second operand 3 states. [2020-12-22 01:53:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:20,702 INFO L93 Difference]: Finished difference Result 4634 states and 5266 transitions. [2020-12-22 01:53:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:20,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 316 [2020-12-22 01:53:20,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:20,718 INFO L225 Difference]: With dead ends: 4634 [2020-12-22 01:53:20,718 INFO L226 Difference]: Without dead ends: 2674 [2020-12-22 01:53:20,723 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 01:53:20,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2020-12-22 01:53:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2496. [2020-12-22 01:53:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2496 states. [2020-12-22 01:53:20,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 2810 transitions. [2020-12-22 01:53:20,794 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 2810 transitions. Word has length 316 [2020-12-22 01:53:20,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:20,797 INFO L481 AbstractCegarLoop]: Abstraction has 2496 states and 2810 transitions. [2020-12-22 01:53:20,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 2810 transitions. [2020-12-22 01:53:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-12-22 01:53:20,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:20,803 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:53:20,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 01:53:20,803 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:20,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:20,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1986254963, now seen corresponding path program 1 times [2020-12-22 01:53:20,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:20,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072996593] [2020-12-22 01:53:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2020-12-22 01:53:21,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072996593] [2020-12-22 01:53:21,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:21,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:53:21,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612295872] [2020-12-22 01:53:21,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:21,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:21,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:21,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:53:21,189 INFO L87 Difference]: Start difference. First operand 2496 states and 2810 transitions. Second operand 3 states. [2020-12-22 01:53:22,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:22,272 INFO L93 Difference]: Finished difference Result 5524 states and 6319 transitions. [2020-12-22 01:53:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:22,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 317 [2020-12-22 01:53:22,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:22,295 INFO L225 Difference]: With dead ends: 5524 [2020-12-22 01:53:22,296 INFO L226 Difference]: Without dead ends: 3208 [2020-12-22 01:53:22,302 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 01:53:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2020-12-22 01:53:22,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 2674. [2020-12-22 01:53:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2674 states. [2020-12-22 01:53:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3019 transitions. [2020-12-22 01:53:22,403 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3019 transitions. Word has length 317 [2020-12-22 01:53:22,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:22,404 INFO L481 AbstractCegarLoop]: Abstraction has 2674 states and 3019 transitions. [2020-12-22 01:53:22,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3019 transitions. [2020-12-22 01:53:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-12-22 01:53:22,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:22,413 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:53:22,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 01:53:22,414 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:22,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:22,415 INFO L82 PathProgramCache]: Analyzing trace with hash -633980486, now seen corresponding path program 1 times [2020-12-22 01:53:22,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:22,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749355844] [2020-12-22 01:53:22,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 331 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2020-12-22 01:53:22,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749355844] [2020-12-22 01:53:22,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:22,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:53:22,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630736749] [2020-12-22 01:53:22,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:53:22,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:22,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:53:22,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:53:22,969 INFO L87 Difference]: Start difference. First operand 2674 states and 3019 transitions. Second operand 4 states. [2020-12-22 01:53:24,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:24,139 INFO L93 Difference]: Finished difference Result 5375 states and 6076 transitions. [2020-12-22 01:53:24,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:53:24,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-12-22 01:53:24,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:24,156 INFO L225 Difference]: With dead ends: 5375 [2020-12-22 01:53:24,156 INFO L226 Difference]: Without dead ends: 2852 [2020-12-22 01:53:24,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:53:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2020-12-22 01:53:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2674. [2020-12-22 01:53:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2674 states. [2020-12-22 01:53:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 2899 transitions. [2020-12-22 01:53:24,248 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 2899 transitions. Word has length 396 [2020-12-22 01:53:24,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:24,249 INFO L481 AbstractCegarLoop]: Abstraction has 2674 states and 2899 transitions. [2020-12-22 01:53:24,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:53:24,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 2899 transitions. [2020-12-22 01:53:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-12-22 01:53:24,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:24,259 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:53:24,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 01:53:24,259 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:24,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:24,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1999262927, now seen corresponding path program 1 times [2020-12-22 01:53:24,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:24,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394598824] [2020-12-22 01:53:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2020-12-22 01:53:24,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394598824] [2020-12-22 01:53:24,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:24,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:53:24,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374212378] [2020-12-22 01:53:24,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:24,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:24,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:24,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:53:24,784 INFO L87 Difference]: Start difference. First operand 2674 states and 2899 transitions. Second operand 3 states. [2020-12-22 01:53:25,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:25,692 INFO L93 Difference]: Finished difference Result 6058 states and 6629 transitions. [2020-12-22 01:53:25,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:25,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 419 [2020-12-22 01:53:25,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:25,710 INFO L225 Difference]: With dead ends: 6058 [2020-12-22 01:53:25,710 INFO L226 Difference]: Without dead ends: 3564 [2020-12-22 01:53:25,715 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 01:53:25,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2020-12-22 01:53:25,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 3564. [2020-12-22 01:53:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3564 states. [2020-12-22 01:53:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 3845 transitions. [2020-12-22 01:53:25,797 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 3845 transitions. Word has length 419 [2020-12-22 01:53:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:25,798 INFO L481 AbstractCegarLoop]: Abstraction has 3564 states and 3845 transitions. [2020-12-22 01:53:25,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:25,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 3845 transitions. [2020-12-22 01:53:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-12-22 01:53:25,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:25,808 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:53:25,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 01:53:25,809 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:25,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1260304558, now seen corresponding path program 1 times [2020-12-22 01:53:25,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:25,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921470834] [2020-12-22 01:53:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 415 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2020-12-22 01:53:26,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921470834] [2020-12-22 01:53:26,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:26,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:53:26,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704002959] [2020-12-22 01:53:26,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:26,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:26,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:26,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:53:26,267 INFO L87 Difference]: Start difference. First operand 3564 states and 3845 transitions. Second operand 3 states. [2020-12-22 01:53:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:27,116 INFO L93 Difference]: Finished difference Result 8550 states and 9306 transitions. [2020-12-22 01:53:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:27,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 460 [2020-12-22 01:53:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:27,137 INFO L225 Difference]: With dead ends: 8550 [2020-12-22 01:53:27,138 INFO L226 Difference]: Without dead ends: 5166 [2020-12-22 01:53:27,143 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 01:53:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2020-12-22 01:53:27,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4810. [2020-12-22 01:53:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4810 states. [2020-12-22 01:53:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 5160 transitions. [2020-12-22 01:53:27,251 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 5160 transitions. Word has length 460 [2020-12-22 01:53:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:27,252 INFO L481 AbstractCegarLoop]: Abstraction has 4810 states and 5160 transitions. [2020-12-22 01:53:27,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 5160 transitions. [2020-12-22 01:53:27,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2020-12-22 01:53:27,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:27,272 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:53:27,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 01:53:27,273 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:27,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2037680378, now seen corresponding path program 1 times [2020-12-22 01:53:27,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:27,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637607722] [2020-12-22 01:53:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 989 proven. 104 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-12-22 01:53:28,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637607722] [2020-12-22 01:53:28,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773533020] [2020-12-22 01:53:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:53:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:28,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:53:28,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:53:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2020-12-22 01:53:29,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:53:29,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2020-12-22 01:53:29,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968691048] [2020-12-22 01:53:29,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:29,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:29,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:29,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:53:29,507 INFO L87 Difference]: Start difference. First operand 4810 states and 5160 transitions. Second operand 3 states. [2020-12-22 01:53:30,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:30,429 INFO L93 Difference]: Finished difference Result 5702 states and 6112 transitions. [2020-12-22 01:53:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:30,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 605 [2020-12-22 01:53:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:30,458 INFO L225 Difference]: With dead ends: 5702 [2020-12-22 01:53:30,458 INFO L226 Difference]: Without dead ends: 5700 [2020-12-22 01:53:30,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:53:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5700 states. [2020-12-22 01:53:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5700 to 4810. [2020-12-22 01:53:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4810 states. [2020-12-22 01:53:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 5160 transitions. [2020-12-22 01:53:30,561 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 5160 transitions. Word has length 605 [2020-12-22 01:53:30,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:30,562 INFO L481 AbstractCegarLoop]: Abstraction has 4810 states and 5160 transitions. [2020-12-22 01:53:30,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:30,563 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 5160 transitions. [2020-12-22 01:53:30,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2020-12-22 01:53:30,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:30,575 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:30,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 01:53:30,789 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:30,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:30,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1209889031, now seen corresponding path program 1 times [2020-12-22 01:53:30,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:30,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125794499] [2020-12-22 01:53:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 762 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2020-12-22 01:53:31,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125794499] [2020-12-22 01:53:31,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686439602] [2020-12-22 01:53:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:53:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:31,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 01:53:31,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:53:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 762 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2020-12-22 01:53:32,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 01:53:32,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-12-22 01:53:32,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748782480] [2020-12-22 01:53:32,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:53:32,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:32,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:53:32,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:53:32,641 INFO L87 Difference]: Start difference. First operand 4810 states and 5160 transitions. Second operand 4 states. [2020-12-22 01:53:34,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:34,111 INFO L93 Difference]: Finished difference Result 10686 states and 11499 transitions. [2020-12-22 01:53:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:53:34,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 615 [2020-12-22 01:53:34,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:34,129 INFO L225 Difference]: With dead ends: 10686 [2020-12-22 01:53:34,129 INFO L226 Difference]: Without dead ends: 6056 [2020-12-22 01:53:34,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:53:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6056 states. [2020-12-22 01:53:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6056 to 5522. [2020-12-22 01:53:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5522 states. [2020-12-22 01:53:34,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5522 states to 5522 states and 5927 transitions. [2020-12-22 01:53:34,303 INFO L78 Accepts]: Start accepts. Automaton has 5522 states and 5927 transitions. Word has length 615 [2020-12-22 01:53:34,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:34,305 INFO L481 AbstractCegarLoop]: Abstraction has 5522 states and 5927 transitions. [2020-12-22 01:53:34,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:53:34,306 INFO L276 IsEmpty]: Start isEmpty. Operand 5522 states and 5927 transitions. [2020-12-22 01:53:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2020-12-22 01:53:34,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:34,317 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-12-22 01:53:34,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 01:53:34,532 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:34,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:34,533 INFO L82 PathProgramCache]: Analyzing trace with hash -612090415, now seen corresponding path program 1 times [2020-12-22 01:53:34,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:34,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138052398] [2020-12-22 01:53:34,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 965 proven. 260 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-22 01:53:36,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138052398] [2020-12-22 01:53:36,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99241613] [2020-12-22 01:53:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:53:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:36,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 01:53:36,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:53:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 1016 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2020-12-22 01:53:37,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:53:37,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2020-12-22 01:53:37,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054822773] [2020-12-22 01:53:37,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:37,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:37,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:37,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:53:37,159 INFO L87 Difference]: Start difference. First operand 5522 states and 5927 transitions. Second operand 3 states. [2020-12-22 01:53:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:38,121 INFO L93 Difference]: Finished difference Result 10864 states and 11673 transitions. [2020-12-22 01:53:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:38,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 625 [2020-12-22 01:53:38,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:38,136 INFO L225 Difference]: With dead ends: 10864 [2020-12-22 01:53:38,137 INFO L226 Difference]: Without dead ends: 5522 [2020-12-22 01:53:38,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 624 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:53:38,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5522 states. [2020-12-22 01:53:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5522 to 5166. [2020-12-22 01:53:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5166 states. [2020-12-22 01:53:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5166 states to 5166 states and 5530 transitions. [2020-12-22 01:53:38,265 INFO L78 Accepts]: Start accepts. Automaton has 5166 states and 5530 transitions. Word has length 625 [2020-12-22 01:53:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:38,266 INFO L481 AbstractCegarLoop]: Abstraction has 5166 states and 5530 transitions. [2020-12-22 01:53:38,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 5166 states and 5530 transitions. [2020-12-22 01:53:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2020-12-22 01:53:38,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:38,277 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:38,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:53:38,483 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:38,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2136798791, now seen corresponding path program 1 times [2020-12-22 01:53:38,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:38,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128118408] [2020-12-22 01:53:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 908 proven. 0 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2020-12-22 01:53:39,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128118408] [2020-12-22 01:53:39,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:39,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:53:39,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232756646] [2020-12-22 01:53:39,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:39,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:39,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:39,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:53:39,267 INFO L87 Difference]: Start difference. First operand 5166 states and 5530 transitions. Second operand 3 states. [2020-12-22 01:53:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:40,287 INFO L93 Difference]: Finished difference Result 11398 states and 12294 transitions. [2020-12-22 01:53:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:40,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 687 [2020-12-22 01:53:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:40,303 INFO L225 Difference]: With dead ends: 11398 [2020-12-22 01:53:40,303 INFO L226 Difference]: Without dead ends: 6412 [2020-12-22 01:53:40,311 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 01:53:40,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6412 states. [2020-12-22 01:53:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6412 to 6234. [2020-12-22 01:53:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6234 states. [2020-12-22 01:53:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6234 states to 6234 states and 6704 transitions. [2020-12-22 01:53:40,472 INFO L78 Accepts]: Start accepts. Automaton has 6234 states and 6704 transitions. Word has length 687 [2020-12-22 01:53:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:40,474 INFO L481 AbstractCegarLoop]: Abstraction has 6234 states and 6704 transitions. [2020-12-22 01:53:40,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 6234 states and 6704 transitions. [2020-12-22 01:53:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2020-12-22 01:53:40,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:40,486 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:40,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 01:53:40,487 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:40,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:40,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2097805772, now seen corresponding path program 1 times [2020-12-22 01:53:40,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:40,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613582305] [2020-12-22 01:53:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 1042 proven. 93 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2020-12-22 01:53:41,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613582305] [2020-12-22 01:53:41,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103347005] [2020-12-22 01:53:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:53:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:42,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 01:53:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:53:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 1135 proven. 0 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2020-12-22 01:53:43,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:53:43,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 01:53:43,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853070511] [2020-12-22 01:53:43,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:43,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:43,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:43,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:53:43,028 INFO L87 Difference]: Start difference. First operand 6234 states and 6704 transitions. Second operand 3 states. [2020-12-22 01:53:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:43,895 INFO L93 Difference]: Finished difference Result 13000 states and 13964 transitions. [2020-12-22 01:53:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:43,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 705 [2020-12-22 01:53:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:43,911 INFO L225 Difference]: With dead ends: 13000 [2020-12-22 01:53:43,911 INFO L226 Difference]: Without dead ends: 6946 [2020-12-22 01:53:43,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 704 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:53:43,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6946 states. [2020-12-22 01:53:44,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6946 to 6234. [2020-12-22 01:53:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6234 states. [2020-12-22 01:53:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6234 states to 6234 states and 6704 transitions. [2020-12-22 01:53:44,030 INFO L78 Accepts]: Start accepts. Automaton has 6234 states and 6704 transitions. Word has length 705 [2020-12-22 01:53:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:44,031 INFO L481 AbstractCegarLoop]: Abstraction has 6234 states and 6704 transitions. [2020-12-22 01:53:44,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 6234 states and 6704 transitions. [2020-12-22 01:53:44,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2020-12-22 01:53:44,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:44,041 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:53:44,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 01:53:44,257 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:44,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1953931041, now seen corresponding path program 1 times [2020-12-22 01:53:44,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:44,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727828566] [2020-12-22 01:53:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 941 proven. 0 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2020-12-22 01:53:45,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727828566] [2020-12-22 01:53:45,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:45,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:53:45,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291540582] [2020-12-22 01:53:45,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:45,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:45,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:45,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:53:45,119 INFO L87 Difference]: Start difference. First operand 6234 states and 6704 transitions. Second operand 3 states. [2020-12-22 01:53:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:46,152 INFO L93 Difference]: Finished difference Result 12288 states and 13229 transitions. [2020-12-22 01:53:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:46,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 732 [2020-12-22 01:53:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:46,170 INFO L225 Difference]: With dead ends: 12288 [2020-12-22 01:53:46,170 INFO L226 Difference]: Without dead ends: 6234 [2020-12-22 01:53:46,180 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 01:53:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6234 states. [2020-12-22 01:53:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6234 to 6056. [2020-12-22 01:53:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6056 states. [2020-12-22 01:53:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6056 states to 6056 states and 6462 transitions. [2020-12-22 01:53:46,305 INFO L78 Accepts]: Start accepts. Automaton has 6056 states and 6462 transitions. Word has length 732 [2020-12-22 01:53:46,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:46,306 INFO L481 AbstractCegarLoop]: Abstraction has 6056 states and 6462 transitions. [2020-12-22 01:53:46,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:46,307 INFO L276 IsEmpty]: Start isEmpty. Operand 6056 states and 6462 transitions. [2020-12-22 01:53:46,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2020-12-22 01:53:46,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:46,318 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:46,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 01:53:46,319 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1108711326, now seen corresponding path program 1 times [2020-12-22 01:53:46,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:46,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535749535] [2020-12-22 01:53:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 1033 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2020-12-22 01:53:47,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535749535] [2020-12-22 01:53:47,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37360297] [2020-12-22 01:53:47,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:53:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:47,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 01:53:47,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:53:48,225 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 01:53:48,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 01:53:48,449 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:48,774 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:49,462 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:50,136 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:51,155 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 01:53:51,237 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:51,325 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:51,462 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:51,640 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:51,661 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 01:53:51,666 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 01:53:51,669 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-22 01:53:51,684 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 01:53:51,688 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-22 01:53:51,697 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2020-12-22 01:53:51,746 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 01:53:51,753 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 01:53:51,755 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-22 01:53:51,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 01:53:51,768 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-22 01:53:51,777 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2020-12-22 01:53:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 746 proven. 0 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2020-12-22 01:53:52,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:53:52,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2020-12-22 01:53:52,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961434531] [2020-12-22 01:53:52,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:53:52,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:52,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:53:52,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:53:52,644 INFO L87 Difference]: Start difference. First operand 6056 states and 6462 transitions. Second operand 4 states. [2020-12-22 01:53:54,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:54,295 INFO L93 Difference]: Finished difference Result 13358 states and 14263 transitions. [2020-12-22 01:53:54,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:53:54,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 782 [2020-12-22 01:53:54,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:54,319 INFO L225 Difference]: With dead ends: 13358 [2020-12-22 01:53:54,319 INFO L226 Difference]: Without dead ends: 7482 [2020-12-22 01:53:54,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 781 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:53:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7482 states. [2020-12-22 01:53:54,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7482 to 6590. [2020-12-22 01:53:54,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6590 states. [2020-12-22 01:53:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 7017 transitions. [2020-12-22 01:53:54,481 INFO L78 Accepts]: Start accepts. Automaton has 6590 states and 7017 transitions. Word has length 782 [2020-12-22 01:53:54,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:54,482 INFO L481 AbstractCegarLoop]: Abstraction has 6590 states and 7017 transitions. [2020-12-22 01:53:54,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:53:54,483 INFO L276 IsEmpty]: Start isEmpty. Operand 6590 states and 7017 transitions. [2020-12-22 01:53:54,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2020-12-22 01:53:54,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:54,498 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:53:54,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:53:54,714 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:54,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:54,716 INFO L82 PathProgramCache]: Analyzing trace with hash -697382010, now seen corresponding path program 1 times [2020-12-22 01:53:54,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:54,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026286067] [2020-12-22 01:53:54,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2085 backedges. 1069 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2020-12-22 01:53:55,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026286067] [2020-12-22 01:53:55,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367379852] [2020-12-22 01:53:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:53:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:56,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 01:53:56,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:53:57,091 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 01:53:57,121 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 01:53:57,179 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:57,287 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:57,437 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:57,552 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 01:53:57,615 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:57,753 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:57,942 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:53:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2085 backedges. 782 proven. 0 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2020-12-22 01:53:58,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:53:58,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2020-12-22 01:53:58,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105854347] [2020-12-22 01:53:58,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:53:58,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:58,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:53:58,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:53:58,960 INFO L87 Difference]: Start difference. First operand 6590 states and 7017 transitions. Second operand 4 states. [2020-12-22 01:54:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:54:00,295 INFO L93 Difference]: Finished difference Result 14070 states and 14983 transitions. [2020-12-22 01:54:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:54:00,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 815 [2020-12-22 01:54:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:54:00,312 INFO L225 Difference]: With dead ends: 14070 [2020-12-22 01:54:00,312 INFO L226 Difference]: Without dead ends: 7660 [2020-12-22 01:54:00,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 814 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:54:00,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7660 states. [2020-12-22 01:54:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7660 to 6590. [2020-12-22 01:54:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6590 states. [2020-12-22 01:54:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 7017 transitions. [2020-12-22 01:54:00,436 INFO L78 Accepts]: Start accepts. Automaton has 6590 states and 7017 transitions. Word has length 815 [2020-12-22 01:54:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:54:00,437 INFO L481 AbstractCegarLoop]: Abstraction has 6590 states and 7017 transitions. [2020-12-22 01:54:00,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:54:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 6590 states and 7017 transitions. [2020-12-22 01:54:00,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2020-12-22 01:54:00,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:54:00,448 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:54:00,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:54:00,662 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:54:00,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:54:00,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1022736429, now seen corresponding path program 1 times [2020-12-22 01:54:00,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:54:00,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783852179] [2020-12-22 01:54:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:54:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:54:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2086 backedges. 1070 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2020-12-22 01:54:01,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783852179] [2020-12-22 01:54:01,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345470075] [2020-12-22 01:54:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:54:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:54:01,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 01:54:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:54:02,581 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 01:54:02,603 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 01:54:02,665 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:02,768 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:03,068 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:03,552 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:04,326 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:05,367 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:06,648 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:08,290 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:10,576 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:12,843 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:15,562 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:19,175 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:22,225 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:26,561 INFO L757 QuantifierPusher]: Run 140 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:31,167 INFO L757 QuantifierPusher]: Run 150 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:37,415 INFO L757 QuantifierPusher]: Run 160 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:45,371 INFO L757 QuantifierPusher]: Run 170 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:54:54,255 INFO L757 QuantifierPusher]: Run 180 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:55:04,412 INFO L757 QuantifierPusher]: Run 190 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:55:15,519 INFO L757 QuantifierPusher]: Run 200 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:55:27,185 INFO L757 QuantifierPusher]: Run 210 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:55:39,712 INFO L757 QuantifierPusher]: Run 220 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:55:53,106 INFO L757 QuantifierPusher]: Run 230 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:07,433 INFO L757 QuantifierPusher]: Run 240 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:21,847 INFO L757 QuantifierPusher]: Run 250 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:31,816 INFO L757 QuantifierPusher]: Run 260 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:35,426 INFO L757 QuantifierPusher]: Run 270 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:36,562 INFO L757 QuantifierPusher]: Run 280 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:37,856 INFO L757 QuantifierPusher]: Run 290 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:39,335 INFO L757 QuantifierPusher]: Run 300 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:41,121 INFO L757 QuantifierPusher]: Run 310 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:43,282 INFO L757 QuantifierPusher]: Run 320 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:45,836 INFO L757 QuantifierPusher]: Run 330 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:48,498 INFO L757 QuantifierPusher]: Run 340 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:50,822 INFO L757 QuantifierPusher]: Run 350 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:53,114 INFO L757 QuantifierPusher]: Run 360 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:55,545 INFO L757 QuantifierPusher]: Run 370 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:56:58,285 INFO L757 QuantifierPusher]: Run 380 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 01:57:01,190 INFO L757 QuantifierPusher]: Run 390 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.