/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:13:37,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:13:37,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:13:37,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:13:37,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:13:37,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:13:37,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:13:37,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:13:37,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:13:37,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:13:37,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:13:37,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:13:37,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:13:37,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:13:37,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:13:37,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:13:37,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:13:37,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:13:37,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:13:37,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:13:37,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:13:37,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:13:37,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:13:37,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:13:37,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:13:37,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:13:37,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:13:37,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:13:37,301 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:13:37,356 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:13:37,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:13:37,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:13:37,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:13:37,361 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:13:37,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:13:37,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:13:37,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:13:37,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:13:37,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:13:37,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:13:37,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:13:37,364 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:13:37,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:13:37,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:13:37,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:13:37,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:13:37,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:13:37,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:13:37,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:13:37,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:13:37,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:13:37,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:13:37,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:13:37,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:13:37,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:13:37,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:13:37,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:13:37,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:13:37,814 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:13:37,814 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:13:37,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:13:37,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a9ca6f9f/d05f765436f64493bb79cc1e676c61bd/FLAGba0091ea5 [2020-12-22 08:13:38,791 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:13:38,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:13:38,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a9ca6f9f/d05f765436f64493bb79cc1e676c61bd/FLAGba0091ea5 [2020-12-22 08:13:38,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a9ca6f9f/d05f765436f64493bb79cc1e676c61bd [2020-12-22 08:13:38,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:13:38,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:13:38,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:13:38,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:13:38,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:13:38,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:13:38" (1/1) ... [2020-12-22 08:13:38,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d766f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:13:38, skipping insertion in model container [2020-12-22 08:13:38,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:13:38" (1/1) ... [2020-12-22 08:13:38,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:13:39,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:13:39,483 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[21535,21548] [2020-12-22 08:13:39,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:13:39,785 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:13:40,071 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[21535,21548] [2020-12-22 08:13:40,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:13:40,202 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:13:40,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:13:40 WrapperNode [2020-12-22 08:13:40,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:13:40,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:13:40,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:13:40,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:13:40,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:13:40" (1/1) ... [2020-12-22 08:13:40,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:13:40" (1/1) ... [2020-12-22 08:13:40,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:13:40,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:13:40,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:13:40,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:13:40,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:13:40" (1/1) ... [2020-12-22 08:13:40,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:13:40" (1/1) ... [2020-12-22 08:13:40,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:13:40" (1/1) ... [2020-12-22 08:13:40,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:13:40" (1/1) ... [2020-12-22 08:13:40,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:13:40" (1/1) ... [2020-12-22 08:13:40,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:13:40" (1/1) ... [2020-12-22 08:13:40,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:13:40" (1/1) ... [2020-12-22 08:13:40,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:13:40,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:13:40,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:13:40,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:13:40,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:13:40" (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 08:13:40,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:13:40,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:13:40,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:13:40,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:13:43,301 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:13:43,301 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:13:43,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:13:43 BoogieIcfgContainer [2020-12-22 08:13:43,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:13:43,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:13:43,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:13:43,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:13:43,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:13:38" (1/3) ... [2020-12-22 08:13:43,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3cdb31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:13:43, skipping insertion in model container [2020-12-22 08:13:43,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:13:40" (2/3) ... [2020-12-22 08:13:43,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3cdb31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:13:43, skipping insertion in model container [2020-12-22 08:13:43,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:13:43" (3/3) ... [2020-12-22 08:13:43,313 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:13:43,319 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:13:43,325 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:13:43,342 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:13:43,374 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:13:43,374 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:13:43,374 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:13:43,375 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:13:43,375 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:13:43,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:13:43,375 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:13:43,375 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:13:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states. [2020-12-22 08:13:43,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-12-22 08:13:43,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:13:43,435 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] [2020-12-22 08:13:43,436 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:13:43,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:13:43,442 INFO L82 PathProgramCache]: Analyzing trace with hash 571162462, now seen corresponding path program 1 times [2020-12-22 08:13:43,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:13:43,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968295055] [2020-12-22 08:13:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:13:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:13:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:13:44,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968295055] [2020-12-22 08:13:44,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:13:44,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:13:44,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563070005] [2020-12-22 08:13:44,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:13:44,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:13:44,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:13:44,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:13:44,324 INFO L87 Difference]: Start difference. First operand 745 states. Second operand 3 states. [2020-12-22 08:13:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:13:44,594 INFO L93 Difference]: Finished difference Result 1136 states and 2022 transitions. [2020-12-22 08:13:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:13:44,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2020-12-22 08:13:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:13:44,624 INFO L225 Difference]: With dead ends: 1136 [2020-12-22 08:13:44,625 INFO L226 Difference]: Without dead ends: 928 [2020-12-22 08:13:44,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:13:44,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2020-12-22 08:13:44,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 925. [2020-12-22 08:13:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 925 states. [2020-12-22 08:13:44,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1606 transitions. [2020-12-22 08:13:44,779 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1606 transitions. Word has length 203 [2020-12-22 08:13:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:13:44,782 INFO L481 AbstractCegarLoop]: Abstraction has 925 states and 1606 transitions. [2020-12-22 08:13:44,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:13:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1606 transitions. [2020-12-22 08:13:44,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-12-22 08:13:44,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:13:44,800 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] [2020-12-22 08:13:44,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:13:44,802 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:13:44,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:13:44,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1880612795, now seen corresponding path program 1 times [2020-12-22 08:13:44,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:13:44,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566556943] [2020-12-22 08:13:44,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:13:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:13:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:13:45,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566556943] [2020-12-22 08:13:45,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:13:45,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:13:45,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826843850] [2020-12-22 08:13:45,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:13:45,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:13:45,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:13:45,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:13:45,080 INFO L87 Difference]: Start difference. First operand 925 states and 1606 transitions. Second operand 3 states. [2020-12-22 08:13:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:13:45,166 INFO L93 Difference]: Finished difference Result 1667 states and 2850 transitions. [2020-12-22 08:13:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:13:45,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2020-12-22 08:13:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:13:45,175 INFO L225 Difference]: With dead ends: 1667 [2020-12-22 08:13:45,175 INFO L226 Difference]: Without dead ends: 1285 [2020-12-22 08:13:45,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:13:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2020-12-22 08:13:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1281. [2020-12-22 08:13:45,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-12-22 08:13:45,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 2200 transitions. [2020-12-22 08:13:45,231 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 2200 transitions. Word has length 207 [2020-12-22 08:13:45,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:13:45,232 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 2200 transitions. [2020-12-22 08:13:45,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:13:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 2200 transitions. [2020-12-22 08:13:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-12-22 08:13:45,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:13:45,237 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] [2020-12-22 08:13:45,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:13:45,238 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:13:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:13:45,239 INFO L82 PathProgramCache]: Analyzing trace with hash -828629634, now seen corresponding path program 1 times [2020-12-22 08:13:45,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:13:45,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312571968] [2020-12-22 08:13:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:13:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:13:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:13:45,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312571968] [2020-12-22 08:13:45,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:13:45,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:13:45,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456205797] [2020-12-22 08:13:45,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:13:45,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:13:45,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:13:45,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:13:45,530 INFO L87 Difference]: Start difference. First operand 1281 states and 2200 transitions. Second operand 3 states. [2020-12-22 08:13:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:13:45,678 INFO L93 Difference]: Finished difference Result 2713 states and 4590 transitions. [2020-12-22 08:13:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:13:45,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2020-12-22 08:13:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:13:45,699 INFO L225 Difference]: With dead ends: 2713 [2020-12-22 08:13:45,700 INFO L226 Difference]: Without dead ends: 1975 [2020-12-22 08:13:45,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:13:45,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2020-12-22 08:13:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1969. [2020-12-22 08:13:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1969 states. [2020-12-22 08:13:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3340 transitions. [2020-12-22 08:13:45,832 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3340 transitions. Word has length 211 [2020-12-22 08:13:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:13:45,843 INFO L481 AbstractCegarLoop]: Abstraction has 1969 states and 3340 transitions. [2020-12-22 08:13:45,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:13:45,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3340 transitions. [2020-12-22 08:13:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-22 08:13:45,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:13:45,854 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] [2020-12-22 08:13:45,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:13:45,854 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:13:45,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:13:45,855 INFO L82 PathProgramCache]: Analyzing trace with hash -295065701, now seen corresponding path program 1 times [2020-12-22 08:13:45,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:13:45,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550363180] [2020-12-22 08:13:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:13:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:13:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:13:46,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550363180] [2020-12-22 08:13:46,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:13:46,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:13:46,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277901618] [2020-12-22 08:13:46,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:13:46,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:13:46,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:13:46,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:13:46,176 INFO L87 Difference]: Start difference. First operand 1969 states and 3340 transitions. Second operand 3 states. [2020-12-22 08:13:46,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:13:46,378 INFO L93 Difference]: Finished difference Result 4733 states and 7926 transitions. [2020-12-22 08:13:46,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:13:46,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2020-12-22 08:13:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:13:46,397 INFO L225 Difference]: With dead ends: 4733 [2020-12-22 08:13:46,397 INFO L226 Difference]: Without dead ends: 3307 [2020-12-22 08:13:46,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:13:46,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2020-12-22 08:13:46,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 3297. [2020-12-22 08:13:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3297 states. [2020-12-22 08:13:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3297 states to 3297 states and 5524 transitions. [2020-12-22 08:13:46,623 INFO L78 Accepts]: Start accepts. Automaton has 3297 states and 5524 transitions. Word has length 215 [2020-12-22 08:13:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:13:46,623 INFO L481 AbstractCegarLoop]: Abstraction has 3297 states and 5524 transitions. [2020-12-22 08:13:46,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:13:46,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3297 states and 5524 transitions. [2020-12-22 08:13:46,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-12-22 08:13:46,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:13:46,629 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] [2020-12-22 08:13:46,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:13:46,630 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:13:46,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:13:46,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1180849054, now seen corresponding path program 1 times [2020-12-22 08:13:46,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:13:46,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903859910] [2020-12-22 08:13:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:13:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:13:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:13:46,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903859910] [2020-12-22 08:13:46,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:13:46,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:13:46,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497222134] [2020-12-22 08:13:46,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:13:46,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:13:46,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:13:46,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:13:46,887 INFO L87 Difference]: Start difference. First operand 3297 states and 5524 transitions. Second operand 3 states. [2020-12-22 08:13:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:13:47,283 INFO L93 Difference]: Finished difference Result 8629 states and 14310 transitions. [2020-12-22 08:13:47,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:13:47,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2020-12-22 08:13:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:13:47,318 INFO L225 Difference]: With dead ends: 8629 [2020-12-22 08:13:47,318 INFO L226 Difference]: Without dead ends: 5875 [2020-12-22 08:13:47,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:13:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2020-12-22 08:13:47,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 5857. [2020-12-22 08:13:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5857 states. [2020-12-22 08:13:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5857 states to 5857 states and 9700 transitions. [2020-12-22 08:13:47,756 INFO L78 Accepts]: Start accepts. Automaton has 5857 states and 9700 transitions. Word has length 219 [2020-12-22 08:13:47,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:13:47,757 INFO L481 AbstractCegarLoop]: Abstraction has 5857 states and 9700 transitions. [2020-12-22 08:13:47,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:13:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 5857 states and 9700 transitions. [2020-12-22 08:13:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-12-22 08:13:47,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:13:47,764 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] [2020-12-22 08:13:47,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:13:47,765 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:13:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:13:47,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1103947909, now seen corresponding path program 1 times [2020-12-22 08:13:47,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:13:47,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467827004] [2020-12-22 08:13:47,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:13:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:13:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:13:48,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467827004] [2020-12-22 08:13:48,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:13:48,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:13:48,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593577513] [2020-12-22 08:13:48,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:13:48,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:13:48,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:13:48,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:13:48,096 INFO L87 Difference]: Start difference. First operand 5857 states and 9700 transitions. Second operand 7 states. [2020-12-22 08:13:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:13:51,186 INFO L93 Difference]: Finished difference Result 35564 states and 58900 transitions. [2020-12-22 08:13:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 08:13:51,187 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 223 [2020-12-22 08:13:51,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:13:51,331 INFO L225 Difference]: With dead ends: 35564 [2020-12-22 08:13:51,331 INFO L226 Difference]: Without dead ends: 30250 [2020-12-22 08:13:51,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:13:51,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30250 states. [2020-12-22 08:13:52,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30250 to 11034. [2020-12-22 08:13:52,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11034 states. [2020-12-22 08:13:52,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11034 states to 11034 states and 18179 transitions. [2020-12-22 08:13:52,571 INFO L78 Accepts]: Start accepts. Automaton has 11034 states and 18179 transitions. Word has length 223 [2020-12-22 08:13:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:13:52,572 INFO L481 AbstractCegarLoop]: Abstraction has 11034 states and 18179 transitions. [2020-12-22 08:13:52,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:13:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 11034 states and 18179 transitions. [2020-12-22 08:13:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 08:13:52,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:13:52,584 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 08:13:52,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:13:52,584 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:13:52,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:13:52,589 INFO L82 PathProgramCache]: Analyzing trace with hash 65733462, now seen corresponding path program 1 times [2020-12-22 08:13:52,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:13:52,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977330975] [2020-12-22 08:13:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:13:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:13:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:13:52,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977330975] [2020-12-22 08:13:52,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:13:52,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:13:52,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437493006] [2020-12-22 08:13:52,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:13:52,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:13:52,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:13:52,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:13:52,859 INFO L87 Difference]: Start difference. First operand 11034 states and 18179 transitions. Second operand 4 states. [2020-12-22 08:13:54,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:13:54,263 INFO L93 Difference]: Finished difference Result 29535 states and 48755 transitions. [2020-12-22 08:13:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:13:54,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 224 [2020-12-22 08:13:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:13:54,312 INFO L225 Difference]: With dead ends: 29535 [2020-12-22 08:13:54,313 INFO L226 Difference]: Without dead ends: 19044 [2020-12-22 08:13:54,333 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 08:13:54,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19044 states. [2020-12-22 08:13:55,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19044 to 16390. [2020-12-22 08:13:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16390 states. [2020-12-22 08:13:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16390 states to 16390 states and 27030 transitions. [2020-12-22 08:13:55,882 INFO L78 Accepts]: Start accepts. Automaton has 16390 states and 27030 transitions. Word has length 224 [2020-12-22 08:13:55,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:13:55,883 INFO L481 AbstractCegarLoop]: Abstraction has 16390 states and 27030 transitions. [2020-12-22 08:13:55,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:13:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 16390 states and 27030 transitions. [2020-12-22 08:13:55,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 08:13:55,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:13:55,897 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] [2020-12-22 08:13:55,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:13:55,898 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:13:55,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:13:55,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1970675618, now seen corresponding path program 1 times [2020-12-22 08:13:55,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:13:55,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622280774] [2020-12-22 08:13:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:13:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:13:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:13:56,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622280774] [2020-12-22 08:13:56,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:13:56,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:13:56,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665305089] [2020-12-22 08:13:56,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:13:56,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:13:56,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:13:56,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:13:56,151 INFO L87 Difference]: Start difference. First operand 16390 states and 27030 transitions. Second operand 4 states. [2020-12-22 08:13:57,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:13:57,758 INFO L93 Difference]: Finished difference Result 44155 states and 72879 transitions. [2020-12-22 08:13:57,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:13:57,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 08:13:57,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:13:57,842 INFO L225 Difference]: With dead ends: 44155 [2020-12-22 08:13:57,843 INFO L226 Difference]: Without dead ends: 28308 [2020-12-22 08:13:57,870 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 08:13:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28308 states. [2020-12-22 08:13:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28308 to 24389. [2020-12-22 08:13:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24389 states. [2020-12-22 08:13:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24389 states to 24389 states and 40184 transitions. [2020-12-22 08:13:59,894 INFO L78 Accepts]: Start accepts. Automaton has 24389 states and 40184 transitions. Word has length 225 [2020-12-22 08:13:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:13:59,894 INFO L481 AbstractCegarLoop]: Abstraction has 24389 states and 40184 transitions. [2020-12-22 08:13:59,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:13:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 24389 states and 40184 transitions. [2020-12-22 08:13:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-22 08:13:59,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:00,000 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] [2020-12-22 08:14:00,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:14:00,000 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:00,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1272079426, now seen corresponding path program 1 times [2020-12-22 08:14:00,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:00,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822588165] [2020-12-22 08:14:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:14:00,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822588165] [2020-12-22 08:14:00,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:00,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:00,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487031606] [2020-12-22 08:14:00,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:00,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:00,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:00,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:00,259 INFO L87 Difference]: Start difference. First operand 24389 states and 40184 transitions. Second operand 3 states. [2020-12-22 08:14:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:02,386 INFO L93 Difference]: Finished difference Result 53977 states and 89263 transitions. [2020-12-22 08:14:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:02,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 226 [2020-12-22 08:14:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:02,465 INFO L225 Difference]: With dead ends: 53977 [2020-12-22 08:14:02,465 INFO L226 Difference]: Without dead ends: 37561 [2020-12-22 08:14:02,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37561 states. [2020-12-22 08:14:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37561 to 37559. [2020-12-22 08:14:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37559 states. [2020-12-22 08:14:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37559 states to 37559 states and 61901 transitions. [2020-12-22 08:14:04,860 INFO L78 Accepts]: Start accepts. Automaton has 37559 states and 61901 transitions. Word has length 226 [2020-12-22 08:14:04,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:04,861 INFO L481 AbstractCegarLoop]: Abstraction has 37559 states and 61901 transitions. [2020-12-22 08:14:04,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:04,861 INFO L276 IsEmpty]: Start isEmpty. Operand 37559 states and 61901 transitions. [2020-12-22 08:14:04,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-22 08:14:04,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:04,867 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] [2020-12-22 08:14:04,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:14:04,867 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:04,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:04,868 INFO L82 PathProgramCache]: Analyzing trace with hash -360564415, now seen corresponding path program 1 times [2020-12-22 08:14:04,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:04,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045942318] [2020-12-22 08:14:04,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:14:05,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045942318] [2020-12-22 08:14:05,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:05,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:05,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323119314] [2020-12-22 08:14:05,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:05,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:05,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:05,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:05,008 INFO L87 Difference]: Start difference. First operand 37559 states and 61901 transitions. Second operand 3 states. [2020-12-22 08:14:08,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:08,062 INFO L93 Difference]: Finished difference Result 82989 states and 136957 transitions. [2020-12-22 08:14:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:08,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 226 [2020-12-22 08:14:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:08,168 INFO L225 Difference]: With dead ends: 82989 [2020-12-22 08:14:08,169 INFO L226 Difference]: Without dead ends: 57576 [2020-12-22 08:14:08,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:08,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57576 states. [2020-12-22 08:14:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57576 to 57574. [2020-12-22 08:14:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57574 states. [2020-12-22 08:14:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57574 states to 57574 states and 94733 transitions. [2020-12-22 08:14:11,744 INFO L78 Accepts]: Start accepts. Automaton has 57574 states and 94733 transitions. Word has length 226 [2020-12-22 08:14:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:11,745 INFO L481 AbstractCegarLoop]: Abstraction has 57574 states and 94733 transitions. [2020-12-22 08:14:11,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 57574 states and 94733 transitions. [2020-12-22 08:14:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-22 08:14:11,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:11,749 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] [2020-12-22 08:14:11,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:14:11,749 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:11,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:11,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1104908596, now seen corresponding path program 1 times [2020-12-22 08:14:11,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:11,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373208937] [2020-12-22 08:14:11,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:14:11,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373208937] [2020-12-22 08:14:11,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:11,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:11,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055320716] [2020-12-22 08:14:11,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:11,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:11,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:11,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:11,897 INFO L87 Difference]: Start difference. First operand 57574 states and 94733 transitions. Second operand 3 states. [2020-12-22 08:14:16,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:16,310 INFO L93 Difference]: Finished difference Result 111162 states and 183332 transitions. [2020-12-22 08:14:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:16,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 226 [2020-12-22 08:14:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:16,624 INFO L225 Difference]: With dead ends: 111162 [2020-12-22 08:14:16,624 INFO L226 Difference]: Without dead ends: 80879 [2020-12-22 08:14:16,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80879 states. [2020-12-22 08:14:21,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80879 to 80877. [2020-12-22 08:14:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80877 states. [2020-12-22 08:14:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80877 states to 80877 states and 132948 transitions. [2020-12-22 08:14:21,591 INFO L78 Accepts]: Start accepts. Automaton has 80877 states and 132948 transitions. Word has length 226 [2020-12-22 08:14:21,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:21,591 INFO L481 AbstractCegarLoop]: Abstraction has 80877 states and 132948 transitions. [2020-12-22 08:14:21,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 80877 states and 132948 transitions. [2020-12-22 08:14:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-22 08:14:21,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:21,594 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] [2020-12-22 08:14:21,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:14:21,595 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:21,595 INFO L82 PathProgramCache]: Analyzing trace with hash -922539701, now seen corresponding path program 1 times [2020-12-22 08:14:21,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:21,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294756391] [2020-12-22 08:14:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:14:22,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294756391] [2020-12-22 08:14:22,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:22,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:22,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726787746] [2020-12-22 08:14:22,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:22,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:22,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:22,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:22,005 INFO L87 Difference]: Start difference. First operand 80877 states and 132948 transitions. Second operand 3 states. [2020-12-22 08:14:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:28,056 INFO L93 Difference]: Finished difference Result 155445 states and 256227 transitions. [2020-12-22 08:14:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:28,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 226 [2020-12-22 08:14:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:28,249 INFO L225 Difference]: With dead ends: 155445 [2020-12-22 08:14:28,249 INFO L226 Difference]: Without dead ends: 112922 [2020-12-22 08:14:28,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112922 states. [2020-12-22 08:14:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112922 to 112920. [2020-12-22 08:14:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112920 states. [2020-12-22 08:14:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112920 states to 112920 states and 185453 transitions. [2020-12-22 08:14:34,884 INFO L78 Accepts]: Start accepts. Automaton has 112920 states and 185453 transitions. Word has length 226 [2020-12-22 08:14:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:34,885 INFO L481 AbstractCegarLoop]: Abstraction has 112920 states and 185453 transitions. [2020-12-22 08:14:34,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 112920 states and 185453 transitions. [2020-12-22 08:14:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-22 08:14:34,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:34,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:14:34,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:14:34,888 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:34,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:34,889 INFO L82 PathProgramCache]: Analyzing trace with hash 898898333, now seen corresponding path program 1 times [2020-12-22 08:14:34,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:34,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274634976] [2020-12-22 08:14:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:14:35,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274634976] [2020-12-22 08:14:35,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:35,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:14:35,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028897697] [2020-12-22 08:14:35,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:14:35,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:35,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:14:35,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:14:35,293 INFO L87 Difference]: Start difference. First operand 112920 states and 185453 transitions. Second operand 4 states. [2020-12-22 08:14:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:47,453 INFO L93 Difference]: Finished difference Result 332619 states and 547427 transitions. [2020-12-22 08:14:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:14:47,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 226 [2020-12-22 08:14:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:48,003 INFO L225 Difference]: With dead ends: 332619 [2020-12-22 08:14:48,003 INFO L226 Difference]: Without dead ends: 220312 [2020-12-22 08:14:48,153 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 08:14:48,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220312 states. [2020-12-22 08:14:58,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220312 to 184958. [2020-12-22 08:14:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184958 states. [2020-12-22 08:14:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184958 states to 184958 states and 303392 transitions. [2020-12-22 08:14:59,405 INFO L78 Accepts]: Start accepts. Automaton has 184958 states and 303392 transitions. Word has length 226 [2020-12-22 08:14:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:59,406 INFO L481 AbstractCegarLoop]: Abstraction has 184958 states and 303392 transitions. [2020-12-22 08:14:59,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:14:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 184958 states and 303392 transitions. [2020-12-22 08:14:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-22 08:14:59,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:59,408 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] [2020-12-22 08:14:59,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:14:59,408 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:59,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:59,409 INFO L82 PathProgramCache]: Analyzing trace with hash 151241642, now seen corresponding path program 1 times [2020-12-22 08:14:59,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:59,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898403915] [2020-12-22 08:14:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:14:59,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898403915] [2020-12-22 08:14:59,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:59,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:59,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554541344] [2020-12-22 08:14:59,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:59,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:59,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:59,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:59,879 INFO L87 Difference]: Start difference. First operand 184958 states and 303392 transitions. Second operand 3 states.