/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:24:37,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:24:37,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:24:37,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:24:37,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:24:37,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:24:37,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:24:37,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:24:37,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:24:37,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:24:37,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:24:37,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:24:37,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:24:37,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:24:37,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:24:37,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:24:37,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:24:37,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:24:37,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:24:37,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:24:37,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:24:37,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:24:37,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:24:37,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:24:37,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:24:37,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:24:37,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:24:37,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:24:37,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:24:37,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:24:37,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:24:37,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:24:37,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:24:37,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:24:37,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:24:37,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:24:37,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:24:37,618 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:24:37,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:24:37,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:24:37,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:24:37,621 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:24:37,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:24:37,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:24:37,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:24:37,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:24:37,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:24:37,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:24:37,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:24:37,624 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:24:37,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:24:37,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:24:37,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:24:37,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:24:37,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:24:37,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:24:37,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:24:37,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:24:37,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:24:37,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:24:37,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:24:37,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:24:37,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:24:38,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:24:38,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:24:38,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:24:38,053 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:24:38,054 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:24:38,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:24:38,163 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c56cb15ba/7975df65d6bd43fabd685a0df9d0e96e/FLAGd87e7cc9a [2020-12-22 07:24:38,949 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:24:38,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:24:38,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c56cb15ba/7975df65d6bd43fabd685a0df9d0e96e/FLAGd87e7cc9a [2020-12-22 07:24:39,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c56cb15ba/7975df65d6bd43fabd685a0df9d0e96e [2020-12-22 07:24:39,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:24:39,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:24:39,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:39,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:24:39,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:24:39,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:39" (1/1) ... [2020-12-22 07:24:39,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dded8b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:39, skipping insertion in model container [2020-12-22 07:24:39,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:39" (1/1) ... [2020-12-22 07:24:39,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:24:39,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:24:39,954 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.UNBOUNDED.pals.c[61125,61138] [2020-12-22 07:24:39,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:39,983 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:24:40,099 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.UNBOUNDED.pals.c[61125,61138] [2020-12-22 07:24:40,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:40,123 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:24:40,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:40 WrapperNode [2020-12-22 07:24:40,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:40,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:40,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:24:40,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:24:40,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:40" (1/1) ... [2020-12-22 07:24:40,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:40" (1/1) ... [2020-12-22 07:24:40,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:40,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:24:40,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:24:40,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:24:40,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:40" (1/1) ... [2020-12-22 07:24:40,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:40" (1/1) ... [2020-12-22 07:24:40,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:40" (1/1) ... [2020-12-22 07:24:40,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:40" (1/1) ... [2020-12-22 07:24:40,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:40" (1/1) ... [2020-12-22 07:24:40,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:40" (1/1) ... [2020-12-22 07:24:40,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:40" (1/1) ... [2020-12-22 07:24:40,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:24:40,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:24:40,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:24:40,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:24:40,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:40" (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 07:24:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:24:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:24:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:24:40,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:24:43,274 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:24:43,275 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:24:43,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:43 BoogieIcfgContainer [2020-12-22 07:24:43,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:24:43,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:24:43,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:24:43,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:24:43,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:24:39" (1/3) ... [2020-12-22 07:24:43,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc62fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:43, skipping insertion in model container [2020-12-22 07:24:43,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:40" (2/3) ... [2020-12-22 07:24:43,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc62fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:43, skipping insertion in model container [2020-12-22 07:24:43,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:43" (3/3) ... [2020-12-22 07:24:43,287 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:24:43,294 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:24:43,300 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:24:43,320 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:24:43,353 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:24:43,354 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:24:43,354 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:24:43,354 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:24:43,354 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:24:43,354 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:24:43,355 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:24:43,355 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:24:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states. [2020-12-22 07:24:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:43,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:43,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:43,429 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:43,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1253378061, now seen corresponding path program 1 times [2020-12-22 07:24:43,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:43,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67320733] [2020-12-22 07:24:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:44,068 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 07:24:44,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67320733] [2020-12-22 07:24:44,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:44,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:24:44,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972832225] [2020-12-22 07:24:44,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:24:44,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:44,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:24:44,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:24:44,096 INFO L87 Difference]: Start difference. First operand 715 states. Second operand 2 states. [2020-12-22 07:24:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:44,168 INFO L93 Difference]: Finished difference Result 881 states and 1605 transitions. [2020-12-22 07:24:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:24:44,170 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 153 [2020-12-22 07:24:44,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:44,196 INFO L225 Difference]: With dead ends: 881 [2020-12-22 07:24:44,197 INFO L226 Difference]: Without dead ends: 711 [2020-12-22 07:24:44,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:24:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-12-22 07:24:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 711. [2020-12-22 07:24:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 711 states. [2020-12-22 07:24:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1310 transitions. [2020-12-22 07:24:44,360 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1310 transitions. Word has length 153 [2020-12-22 07:24:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:44,362 INFO L481 AbstractCegarLoop]: Abstraction has 711 states and 1310 transitions. [2020-12-22 07:24:44,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:24:44,362 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1310 transitions. [2020-12-22 07:24:44,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:44,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:44,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:44,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:24:44,372 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:44,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:44,377 INFO L82 PathProgramCache]: Analyzing trace with hash 743904971, now seen corresponding path program 1 times [2020-12-22 07:24:44,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:44,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589595002] [2020-12-22 07:24:44,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:44,745 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 07:24:44,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589595002] [2020-12-22 07:24:44,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:44,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:24:44,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316457146] [2020-12-22 07:24:44,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:24:44,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:44,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:24:44,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:44,753 INFO L87 Difference]: Start difference. First operand 711 states and 1310 transitions. Second operand 5 states. [2020-12-22 07:24:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:44,978 INFO L93 Difference]: Finished difference Result 880 states and 1598 transitions. [2020-12-22 07:24:44,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:24:44,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-12-22 07:24:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:44,992 INFO L225 Difference]: With dead ends: 880 [2020-12-22 07:24:44,992 INFO L226 Difference]: Without dead ends: 711 [2020-12-22 07:24:44,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:24:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-12-22 07:24:45,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 711. [2020-12-22 07:24:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 711 states. [2020-12-22 07:24:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1250 transitions. [2020-12-22 07:24:45,042 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1250 transitions. Word has length 153 [2020-12-22 07:24:45,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:45,044 INFO L481 AbstractCegarLoop]: Abstraction has 711 states and 1250 transitions. [2020-12-22 07:24:45,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:24:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1250 transitions. [2020-12-22 07:24:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 07:24:45,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:45,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:45,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:24:45,056 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:45,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:45,057 INFO L82 PathProgramCache]: Analyzing trace with hash 323732946, now seen corresponding path program 1 times [2020-12-22 07:24:45,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:45,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616627813] [2020-12-22 07:24:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:45,446 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 07:24:45,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616627813] [2020-12-22 07:24:45,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:45,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:45,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667627241] [2020-12-22 07:24:45,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:45,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:45,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:45,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:45,454 INFO L87 Difference]: Start difference. First operand 711 states and 1250 transitions. Second operand 3 states. [2020-12-22 07:24:45,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:45,555 INFO L93 Difference]: Finished difference Result 1028 states and 1793 transitions. [2020-12-22 07:24:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:45,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-22 07:24:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:45,568 INFO L225 Difference]: With dead ends: 1028 [2020-12-22 07:24:45,568 INFO L226 Difference]: Without dead ends: 863 [2020-12-22 07:24:45,571 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 07:24:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-12-22 07:24:45,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 860. [2020-12-22 07:24:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 07:24:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1501 transitions. [2020-12-22 07:24:45,625 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1501 transitions. Word has length 212 [2020-12-22 07:24:45,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:45,634 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1501 transitions. [2020-12-22 07:24:45,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1501 transitions. [2020-12-22 07:24:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 07:24:45,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:45,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:45,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:24:45,644 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:45,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1975826350, now seen corresponding path program 1 times [2020-12-22 07:24:45,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:45,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417652677] [2020-12-22 07:24:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:46,100 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 07:24:46,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417652677] [2020-12-22 07:24:46,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:46,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:46,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665516831] [2020-12-22 07:24:46,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:46,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:46,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:46,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:46,108 INFO L87 Difference]: Start difference. First operand 860 states and 1501 transitions. Second operand 3 states. [2020-12-22 07:24:46,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:46,209 INFO L93 Difference]: Finished difference Result 1466 states and 2529 transitions. [2020-12-22 07:24:46,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:46,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-12-22 07:24:46,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:46,220 INFO L225 Difference]: With dead ends: 1466 [2020-12-22 07:24:46,221 INFO L226 Difference]: Without dead ends: 1152 [2020-12-22 07:24:46,222 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 07:24:46,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2020-12-22 07:24:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1148. [2020-12-22 07:24:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1148 states. [2020-12-22 07:24:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1987 transitions. [2020-12-22 07:24:46,283 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1987 transitions. Word has length 216 [2020-12-22 07:24:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:46,284 INFO L481 AbstractCegarLoop]: Abstraction has 1148 states and 1987 transitions. [2020-12-22 07:24:46,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:46,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1987 transitions. [2020-12-22 07:24:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 07:24:46,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:46,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:46,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:24:46,292 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:46,293 INFO L82 PathProgramCache]: Analyzing trace with hash 194635210, now seen corresponding path program 1 times [2020-12-22 07:24:46,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:46,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40319586] [2020-12-22 07:24:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:46,603 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 07:24:46,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40319586] [2020-12-22 07:24:46,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:46,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:46,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969088177] [2020-12-22 07:24:46,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:46,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:46,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:46,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:46,607 INFO L87 Difference]: Start difference. First operand 1148 states and 1987 transitions. Second operand 3 states. [2020-12-22 07:24:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:46,693 INFO L93 Difference]: Finished difference Result 2308 states and 3945 transitions. [2020-12-22 07:24:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:46,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 07:24:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:46,705 INFO L225 Difference]: With dead ends: 2308 [2020-12-22 07:24:46,706 INFO L226 Difference]: Without dead ends: 1706 [2020-12-22 07:24:46,708 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 07:24:46,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-12-22 07:24:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1700. [2020-12-22 07:24:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1700 states. [2020-12-22 07:24:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2911 transitions. [2020-12-22 07:24:46,772 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2911 transitions. Word has length 220 [2020-12-22 07:24:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:46,772 INFO L481 AbstractCegarLoop]: Abstraction has 1700 states and 2911 transitions. [2020-12-22 07:24:46,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2911 transitions. [2020-12-22 07:24:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 07:24:46,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:46,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:46,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:24:46,779 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:46,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1875750874, now seen corresponding path program 1 times [2020-12-22 07:24:46,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:46,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372548818] [2020-12-22 07:24:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:47,050 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 07:24:47,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372548818] [2020-12-22 07:24:47,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:47,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:47,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014495367] [2020-12-22 07:24:47,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:47,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:47,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:47,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:47,053 INFO L87 Difference]: Start difference. First operand 1700 states and 2911 transitions. Second operand 3 states. [2020-12-22 07:24:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:47,142 INFO L93 Difference]: Finished difference Result 3920 states and 6633 transitions. [2020-12-22 07:24:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:47,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2020-12-22 07:24:47,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:47,160 INFO L225 Difference]: With dead ends: 3920 [2020-12-22 07:24:47,160 INFO L226 Difference]: Without dead ends: 2766 [2020-12-22 07:24:47,163 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 07:24:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2020-12-22 07:24:47,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2756. [2020-12-22 07:24:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2756 states. [2020-12-22 07:24:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4663 transitions. [2020-12-22 07:24:47,260 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4663 transitions. Word has length 224 [2020-12-22 07:24:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:47,261 INFO L481 AbstractCegarLoop]: Abstraction has 2756 states and 4663 transitions. [2020-12-22 07:24:47,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4663 transitions. [2020-12-22 07:24:47,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 07:24:47,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:47,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:47,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:24:47,268 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:47,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:47,275 INFO L82 PathProgramCache]: Analyzing trace with hash 325314, now seen corresponding path program 1 times [2020-12-22 07:24:47,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:47,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513685802] [2020-12-22 07:24:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:47,565 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 07:24:47,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513685802] [2020-12-22 07:24:47,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:47,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:47,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404797240] [2020-12-22 07:24:47,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:47,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:47,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:47,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:47,569 INFO L87 Difference]: Start difference. First operand 2756 states and 4663 transitions. Second operand 3 states. [2020-12-22 07:24:47,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:47,690 INFO L93 Difference]: Finished difference Result 7000 states and 11721 transitions. [2020-12-22 07:24:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:47,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 228 [2020-12-22 07:24:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:47,722 INFO L225 Difference]: With dead ends: 7000 [2020-12-22 07:24:47,722 INFO L226 Difference]: Without dead ends: 4790 [2020-12-22 07:24:47,731 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 07:24:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4790 states. [2020-12-22 07:24:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4790 to 4772. [2020-12-22 07:24:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4772 states. [2020-12-22 07:24:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 7975 transitions. [2020-12-22 07:24:47,897 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 7975 transitions. Word has length 228 [2020-12-22 07:24:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:47,898 INFO L481 AbstractCegarLoop]: Abstraction has 4772 states and 7975 transitions. [2020-12-22 07:24:47,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:47,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 7975 transitions. [2020-12-22 07:24:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-22 07:24:47,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:47,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:47,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:24:47,906 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:47,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:47,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1486412190, now seen corresponding path program 1 times [2020-12-22 07:24:47,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:47,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287412528] [2020-12-22 07:24:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:48,254 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 07:24:48,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287412528] [2020-12-22 07:24:48,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:48,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:24:48,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684648610] [2020-12-22 07:24:48,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:24:48,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:48,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:24:48,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:24:48,257 INFO L87 Difference]: Start difference. First operand 4772 states and 7975 transitions. Second operand 7 states. [2020-12-22 07:24:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:49,213 INFO L93 Difference]: Finished difference Result 26566 states and 44464 transitions. [2020-12-22 07:24:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:24:49,214 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-12-22 07:24:49,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:49,319 INFO L225 Difference]: With dead ends: 26566 [2020-12-22 07:24:49,320 INFO L226 Difference]: Without dead ends: 22340 [2020-12-22 07:24:49,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:24:49,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22340 states. [2020-12-22 07:24:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22340 to 10944. [2020-12-22 07:24:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10944 states. [2020-12-22 07:24:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10944 states to 10944 states and 18278 transitions. [2020-12-22 07:24:50,008 INFO L78 Accepts]: Start accepts. Automaton has 10944 states and 18278 transitions. Word has length 232 [2020-12-22 07:24:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:50,008 INFO L481 AbstractCegarLoop]: Abstraction has 10944 states and 18278 transitions. [2020-12-22 07:24:50,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:24:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 10944 states and 18278 transitions. [2020-12-22 07:24:50,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:50,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:50,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:50,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:24:50,018 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:50,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:50,019 INFO L82 PathProgramCache]: Analyzing trace with hash 862725536, now seen corresponding path program 1 times [2020-12-22 07:24:50,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:50,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164677974] [2020-12-22 07:24:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:50,244 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 07:24:50,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164677974] [2020-12-22 07:24:50,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:50,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:50,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491992168] [2020-12-22 07:24:50,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:50,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:50,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:50,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:50,247 INFO L87 Difference]: Start difference. First operand 10944 states and 18278 transitions. Second operand 4 states. [2020-12-22 07:24:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:50,743 INFO L93 Difference]: Finished difference Result 25679 states and 42893 transitions. [2020-12-22 07:24:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:50,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 233 [2020-12-22 07:24:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:50,786 INFO L225 Difference]: With dead ends: 25679 [2020-12-22 07:24:50,786 INFO L226 Difference]: Without dead ends: 15281 [2020-12-22 07:24:50,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 07:24:50,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15281 states. [2020-12-22 07:24:51,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15281 to 15246. [2020-12-22 07:24:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15246 states. [2020-12-22 07:24:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15246 states to 15246 states and 25455 transitions. [2020-12-22 07:24:51,311 INFO L78 Accepts]: Start accepts. Automaton has 15246 states and 25455 transitions. Word has length 233 [2020-12-22 07:24:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:51,312 INFO L481 AbstractCegarLoop]: Abstraction has 15246 states and 25455 transitions. [2020-12-22 07:24:51,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:51,312 INFO L276 IsEmpty]: Start isEmpty. Operand 15246 states and 25455 transitions. [2020-12-22 07:24:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-22 07:24:51,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:51,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:51,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:24:51,325 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:51,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1122687211, now seen corresponding path program 1 times [2020-12-22 07:24:51,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:51,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777926257] [2020-12-22 07:24:51,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:51,690 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 07:24:51,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777926257] [2020-12-22 07:24:51,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:51,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:51,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618043063] [2020-12-22 07:24:51,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:51,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:51,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:51,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:51,693 INFO L87 Difference]: Start difference. First operand 15246 states and 25455 transitions. Second operand 4 states. [2020-12-22 07:24:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:52,386 INFO L93 Difference]: Finished difference Result 45284 states and 75706 transitions. [2020-12-22 07:24:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:52,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 234 [2020-12-22 07:24:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:52,598 INFO L225 Difference]: With dead ends: 45284 [2020-12-22 07:24:52,598 INFO L226 Difference]: Without dead ends: 30584 [2020-12-22 07:24:52,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 07:24:52,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30584 states. [2020-12-22 07:24:53,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30584 to 22679. [2020-12-22 07:24:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22679 states. [2020-12-22 07:24:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22679 states to 22679 states and 37827 transitions. [2020-12-22 07:24:53,440 INFO L78 Accepts]: Start accepts. Automaton has 22679 states and 37827 transitions. Word has length 234 [2020-12-22 07:24:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:53,441 INFO L481 AbstractCegarLoop]: Abstraction has 22679 states and 37827 transitions. [2020-12-22 07:24:53,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 22679 states and 37827 transitions. [2020-12-22 07:24:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:24:53,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:53,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:53,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:24:53,456 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2140950537, now seen corresponding path program 1 times [2020-12-22 07:24:53,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:53,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809839686] [2020-12-22 07:24:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:53,743 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 07:24:53,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809839686] [2020-12-22 07:24:53,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:53,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:53,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671157587] [2020-12-22 07:24:53,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:53,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:53,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:53,755 INFO L87 Difference]: Start difference. First operand 22679 states and 37827 transitions. Second operand 3 states. [2020-12-22 07:24:54,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:54,347 INFO L93 Difference]: Finished difference Result 52304 states and 87469 transitions. [2020-12-22 07:24:54,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:54,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:24:54,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:54,547 INFO L225 Difference]: With dead ends: 52304 [2020-12-22 07:24:54,547 INFO L226 Difference]: Without dead ends: 35949 [2020-12-22 07:24:54,570 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 07:24:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35949 states. [2020-12-22 07:24:55,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35949 to 35947. [2020-12-22 07:24:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35947 states. [2020-12-22 07:24:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35947 states to 35947 states and 59851 transitions. [2020-12-22 07:24:55,688 INFO L78 Accepts]: Start accepts. Automaton has 35947 states and 59851 transitions. Word has length 235 [2020-12-22 07:24:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:55,689 INFO L481 AbstractCegarLoop]: Abstraction has 35947 states and 59851 transitions. [2020-12-22 07:24:55,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand 35947 states and 59851 transitions. [2020-12-22 07:24:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:24:55,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:55,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:55,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:24:55,697 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:55,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:55,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1580766843, now seen corresponding path program 1 times [2020-12-22 07:24:55,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:55,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647695169] [2020-12-22 07:24:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:56,053 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 07:24:56,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647695169] [2020-12-22 07:24:56,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:56,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:56,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412856794] [2020-12-22 07:24:56,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:56,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:56,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:56,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:56,056 INFO L87 Difference]: Start difference. First operand 35947 states and 59851 transitions. Second operand 3 states. [2020-12-22 07:24:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:57,005 INFO L93 Difference]: Finished difference Result 70304 states and 117205 transitions. [2020-12-22 07:24:57,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:57,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:24:57,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:57,224 INFO L225 Difference]: With dead ends: 70304 [2020-12-22 07:24:57,224 INFO L226 Difference]: Without dead ends: 51206 [2020-12-22 07:24:57,271 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 07:24:57,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51206 states. [2020-12-22 07:24:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51206 to 51204. [2020-12-22 07:24:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51204 states. [2020-12-22 07:24:58,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51204 states to 51204 states and 85035 transitions. [2020-12-22 07:24:58,932 INFO L78 Accepts]: Start accepts. Automaton has 51204 states and 85035 transitions. Word has length 235 [2020-12-22 07:24:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:58,933 INFO L481 AbstractCegarLoop]: Abstraction has 51204 states and 85035 transitions. [2020-12-22 07:24:58,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:58,933 INFO L276 IsEmpty]: Start isEmpty. Operand 51204 states and 85035 transitions. [2020-12-22 07:24:58,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:24:58,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:58,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:58,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:24:58,940 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:58,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:58,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1900282093, now seen corresponding path program 1 times [2020-12-22 07:24:58,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:58,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578695932] [2020-12-22 07:24:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:59,295 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 07:24:59,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578695932] [2020-12-22 07:24:59,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:59,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:59,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784063087] [2020-12-22 07:24:59,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:59,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:59,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:59,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:59,299 INFO L87 Difference]: Start difference. First operand 51204 states and 85035 transitions. Second operand 3 states. [2020-12-22 07:25:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:00,556 INFO L93 Difference]: Finished difference Result 99832 states and 166071 transitions. [2020-12-22 07:25:00,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:00,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:25:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:00,703 INFO L225 Difference]: With dead ends: 99832 [2020-12-22 07:25:00,704 INFO L226 Difference]: Without dead ends: 72694 [2020-12-22 07:25:00,744 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 07:25:00,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72694 states. [2020-12-22 07:25:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72694 to 72692. [2020-12-22 07:25:02,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72692 states. [2020-12-22 07:25:02,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72692 states to 72692 states and 120401 transitions. [2020-12-22 07:25:02,785 INFO L78 Accepts]: Start accepts. Automaton has 72692 states and 120401 transitions. Word has length 235 [2020-12-22 07:25:02,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:02,785 INFO L481 AbstractCegarLoop]: Abstraction has 72692 states and 120401 transitions. [2020-12-22 07:25:02,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 72692 states and 120401 transitions. [2020-12-22 07:25:02,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:25:02,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:02,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:02,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:25:02,791 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:02,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:02,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1923031415, now seen corresponding path program 1 times [2020-12-22 07:25:02,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:02,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646642441] [2020-12-22 07:25:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:02,974 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 07:25:02,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646642441] [2020-12-22 07:25:02,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:02,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:02,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950977404] [2020-12-22 07:25:02,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:02,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:02,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:02,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:02,977 INFO L87 Difference]: Start difference. First operand 72692 states and 120401 transitions. Second operand 4 states. [2020-12-22 07:25:06,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:06,051 INFO L93 Difference]: Finished difference Result 237257 states and 393670 transitions. [2020-12-22 07:25:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:06,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2020-12-22 07:25:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:06,358 INFO L225 Difference]: With dead ends: 237257 [2020-12-22 07:25:06,358 INFO L226 Difference]: Without dead ends: 165360 [2020-12-22 07:25:06,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:25:06,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165360 states. [2020-12-22 07:25:09,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165360 to 118818. [2020-12-22 07:25:09,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118818 states. [2020-12-22 07:25:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118818 states to 118818 states and 196479 transitions. [2020-12-22 07:25:09,788 INFO L78 Accepts]: Start accepts. Automaton has 118818 states and 196479 transitions. Word has length 235 [2020-12-22 07:25:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:09,788 INFO L481 AbstractCegarLoop]: Abstraction has 118818 states and 196479 transitions. [2020-12-22 07:25:09,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 118818 states and 196479 transitions. [2020-12-22 07:25:09,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:25:09,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:09,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:09,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:25:09,791 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:09,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:09,792 INFO L82 PathProgramCache]: Analyzing trace with hash 568583988, now seen corresponding path program 1 times [2020-12-22 07:25:09,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:09,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263243107] [2020-12-22 07:25:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:10,248 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 07:25:10,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263243107] [2020-12-22 07:25:10,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:10,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:10,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695275270] [2020-12-22 07:25:10,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:10,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:10,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:10,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:10,252 INFO L87 Difference]: Start difference. First operand 118818 states and 196479 transitions. Second operand 3 states. [2020-12-22 07:25:12,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:12,799 INFO L93 Difference]: Finished difference Result 231880 states and 384221 transitions. [2020-12-22 07:25:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:12,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:25:12,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:13,108 INFO L225 Difference]: With dead ends: 231880 [2020-12-22 07:25:13,108 INFO L226 Difference]: Without dead ends: 167993 [2020-12-22 07:25:13,174 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 07:25:13,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167993 states. [2020-12-22 07:25:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167993 to 167991. [2020-12-22 07:25:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167991 states. [2020-12-22 07:25:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167991 states to 167991 states and 277009 transitions. [2020-12-22 07:25:17,177 INFO L78 Accepts]: Start accepts. Automaton has 167991 states and 277009 transitions. Word has length 235 [2020-12-22 07:25:17,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:17,177 INFO L481 AbstractCegarLoop]: Abstraction has 167991 states and 277009 transitions. [2020-12-22 07:25:17,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 167991 states and 277009 transitions. [2020-12-22 07:25:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:25:17,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:17,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:17,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:25:17,180 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:17,181 INFO L82 PathProgramCache]: Analyzing trace with hash -311882046, now seen corresponding path program 1 times [2020-12-22 07:25:17,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:17,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577160922] [2020-12-22 07:25:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:17,334 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 07:25:17,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577160922] [2020-12-22 07:25:17,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:17,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:17,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360570679] [2020-12-22 07:25:17,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:17,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:17,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:17,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:17,337 INFO L87 Difference]: Start difference. First operand 167991 states and 277009 transitions. Second operand 3 states. [2020-12-22 07:25:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:21,605 INFO L93 Difference]: Finished difference Result 371939 states and 613964 transitions. [2020-12-22 07:25:21,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:21,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:25:21,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:22,095 INFO L225 Difference]: With dead ends: 371939 [2020-12-22 07:25:22,095 INFO L226 Difference]: Without dead ends: 255733 [2020-12-22 07:25:22,193 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 07:25:22,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255733 states. [2020-12-22 07:25:28,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255733 to 255731. [2020-12-22 07:25:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255731 states. [2020-12-22 07:25:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255731 states to 255731 states and 419742 transitions. [2020-12-22 07:25:29,033 INFO L78 Accepts]: Start accepts. Automaton has 255731 states and 419742 transitions. Word has length 235 [2020-12-22 07:25:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:29,034 INFO L481 AbstractCegarLoop]: Abstraction has 255731 states and 419742 transitions. [2020-12-22 07:25:29,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:29,034 INFO L276 IsEmpty]: Start isEmpty. Operand 255731 states and 419742 transitions. [2020-12-22 07:25:29,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-22 07:25:29,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:29,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:29,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:25:29,038 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2020032652, now seen corresponding path program 1 times [2020-12-22 07:25:29,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:29,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192555523] [2020-12-22 07:25:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:29,234 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 07:25:29,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192555523] [2020-12-22 07:25:29,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:29,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:29,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078225357] [2020-12-22 07:25:29,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:29,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:29,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:29,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:29,237 INFO L87 Difference]: Start difference. First operand 255731 states and 419742 transitions. Second operand 4 states. [2020-12-22 07:25:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:38,992 INFO L93 Difference]: Finished difference Result 837752 states and 1377930 transitions. [2020-12-22 07:25:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:38,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2020-12-22 07:25:38,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:40,473 INFO L225 Difference]: With dead ends: 837752 [2020-12-22 07:25:40,474 INFO L226 Difference]: Without dead ends: 582633 [2020-12-22 07:25:40,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:25:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582633 states. [2020-12-22 07:25:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582633 to 418325. [2020-12-22 07:25:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418325 states. [2020-12-22 07:25:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418325 states to 418325 states and 685221 transitions. [2020-12-22 07:25:54,742 INFO L78 Accepts]: Start accepts. Automaton has 418325 states and 685221 transitions. Word has length 236 [2020-12-22 07:25:54,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:54,743 INFO L481 AbstractCegarLoop]: Abstraction has 418325 states and 685221 transitions. [2020-12-22 07:25:54,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:54,743 INFO L276 IsEmpty]: Start isEmpty. Operand 418325 states and 685221 transitions. [2020-12-22 07:25:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 07:25:54,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:54,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:54,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:25:54,746 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:54,746 INFO L82 PathProgramCache]: Analyzing trace with hash 901108046, now seen corresponding path program 1 times [2020-12-22 07:25:54,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:54,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673292935] [2020-12-22 07:25:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:55,035 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 07:25:55,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673292935] [2020-12-22 07:25:55,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:55,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:55,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770503709] [2020-12-22 07:25:55,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:55,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:55,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:55,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:55,046 INFO L87 Difference]: Start difference. First operand 418325 states and 685221 transitions. Second operand 4 states. [2020-12-22 07:26:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:15,347 INFO L93 Difference]: Finished difference Result 1356096 states and 2226004 transitions. [2020-12-22 07:26:15,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:26:15,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2020-12-22 07:26:15,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:17,891 INFO L225 Difference]: With dead ends: 1356096 [2020-12-22 07:26:17,891 INFO L226 Difference]: Without dead ends: 938383 [2020-12-22 07:26:18,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:26:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938383 states. [2020-12-22 07:26:42,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938383 to 676987. [2020-12-22 07:26:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676987 states. [2020-12-22 07:26:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676987 states to 676987 states and 1106708 transitions. [2020-12-22 07:26:46,543 INFO L78 Accepts]: Start accepts. Automaton has 676987 states and 1106708 transitions. Word has length 237 [2020-12-22 07:26:46,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:46,543 INFO L481 AbstractCegarLoop]: Abstraction has 676987 states and 1106708 transitions. [2020-12-22 07:26:46,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:26:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 676987 states and 1106708 transitions. [2020-12-22 07:26:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:26:46,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:46,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:26:46,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:26:46,569 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:46,570 INFO L82 PathProgramCache]: Analyzing trace with hash 371666150, now seen corresponding path program 1 times [2020-12-22 07:26:46,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:46,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806561887] [2020-12-22 07:26:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:47,189 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 07:26:47,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806561887] [2020-12-22 07:26:47,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:47,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:26:47,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029646269] [2020-12-22 07:26:47,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:26:47,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:47,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:26:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:26:47,193 INFO L87 Difference]: Start difference. First operand 676987 states and 1106708 transitions. Second operand 7 states. [2020-12-22 07:27:06,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:06,853 INFO L93 Difference]: Finished difference Result 1353366 states and 2212354 transitions. [2020-12-22 07:27:06,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:27:06,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 239 [2020-12-22 07:27:06,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:08,365 INFO L225 Difference]: With dead ends: 1353366 [2020-12-22 07:27:08,366 INFO L226 Difference]: Without dead ends: 676991 [2020-12-22 07:27:09,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:27:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676991 states. [2020-12-22 07:27:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676991 to 676987. [2020-12-22 07:27:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676987 states. [2020-12-22 07:27:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676987 states to 676987 states and 1103583 transitions. [2020-12-22 07:27:30,193 INFO L78 Accepts]: Start accepts. Automaton has 676987 states and 1103583 transitions. Word has length 239 [2020-12-22 07:27:30,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:30,193 INFO L481 AbstractCegarLoop]: Abstraction has 676987 states and 1103583 transitions. [2020-12-22 07:27:30,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:27:30,194 INFO L276 IsEmpty]: Start isEmpty. Operand 676987 states and 1103583 transitions. [2020-12-22 07:27:30,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 07:27:30,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:30,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:30,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:27:30,208 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:30,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:30,208 INFO L82 PathProgramCache]: Analyzing trace with hash 379198031, now seen corresponding path program 1 times [2020-12-22 07:27:30,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:30,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261239167] [2020-12-22 07:27:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:30,640 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 07:27:30,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261239167] [2020-12-22 07:27:30,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:30,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:27:30,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768038909] [2020-12-22 07:27:30,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:27:30,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:30,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:27:30,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:27:30,642 INFO L87 Difference]: Start difference. First operand 676987 states and 1103583 transitions. Second operand 7 states.