/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.3.3.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:19:46,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:19:46,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:19:46,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:19:46,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:19:46,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:19:46,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:19:46,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:19:46,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:19:46,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:19:46,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:19:46,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:19:46,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:19:46,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:19:46,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:19:46,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:19:46,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:19:46,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:19:46,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:19:46,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:19:46,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:19:46,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:19:46,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:19:46,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:19:46,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 07:19:46,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 07:19:46,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 07:19:46,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 07:19:46,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 07:19:46,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 07:19:46,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:19:46,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:19:46,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:19:46,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:19:46,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:19:46,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:19:46,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:19:46,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:19:46,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:19:46,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:19:46,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:19:46,488 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:19:46,534 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:19:46,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:19:46,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:19:46,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:19:46,540 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:19:46,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:19:46,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:19:46,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:19:46,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:19:46,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:19:46,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:19:46,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:19:46,542 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:19:46,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:19:46,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:19:46,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:19:46,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:19:46,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:19:46,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:19:46,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:19:46,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:19:46,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:19:46,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:19:46,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:19:46,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:19:46,545 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:19:46,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:19:46,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:19:46,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:19:46,990 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:19:46,991 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:19:46,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:19:47,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b20c1cc31/ac857e3f127547739a518ee6fd9de741/FLAGd23f22a79 [2020-12-22 07:19:47,887 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:19:47,887 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:19:47,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b20c1cc31/ac857e3f127547739a518ee6fd9de741/FLAGd23f22a79 [2020-12-22 07:19:48,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b20c1cc31/ac857e3f127547739a518ee6fd9de741 [2020-12-22 07:19:48,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:19:48,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:19:48,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:19:48,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:19:48,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:19:48,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:19:48" (1/1) ... [2020-12-22 07:19:48,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d1db702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:48, skipping insertion in model container [2020-12-22 07:19:48,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:19:48" (1/1) ... [2020-12-22 07:19:48,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:19:48,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:19:48,508 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.3.3.ufo.UNBOUNDED.pals.c[12968,12981] [2020-12-22 07:19:48,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:19:48,534 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:19:48,674 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.3.3.ufo.UNBOUNDED.pals.c[12968,12981] [2020-12-22 07:19:48,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:19:48,698 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:19:48,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:48 WrapperNode [2020-12-22 07:19:48,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:19:48,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:19:48,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:19:48,700 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:19:48,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:48" (1/1) ... [2020-12-22 07:19:48,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:48" (1/1) ... [2020-12-22 07:19:48,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:19:48,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:19:48,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:19:48,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:19:48,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:48" (1/1) ... [2020-12-22 07:19:48,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:48" (1/1) ... [2020-12-22 07:19:48,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:48" (1/1) ... [2020-12-22 07:19:48,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:48" (1/1) ... [2020-12-22 07:19:48,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:48" (1/1) ... [2020-12-22 07:19:48,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:48" (1/1) ... [2020-12-22 07:19:48,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:48" (1/1) ... [2020-12-22 07:19:48,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:19:48,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:19:48,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:19:48,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:19:48,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:48" (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 07:19:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:19:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:19:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:19:48,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:19:49,840 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:19:49,841 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:19:49,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:19:49 BoogieIcfgContainer [2020-12-22 07:19:49,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:19:49,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:19:49,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:19:49,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:19:49,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:19:48" (1/3) ... [2020-12-22 07:19:49,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8ba489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:19:49, skipping insertion in model container [2020-12-22 07:19:49,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:48" (2/3) ... [2020-12-22 07:19:49,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8ba489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:19:49, skipping insertion in model container [2020-12-22 07:19:49,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:19:49" (3/3) ... [2020-12-22 07:19:49,852 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:19:49,859 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:19:49,864 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:19:49,884 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:19:49,912 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:19:49,912 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:19:49,913 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:19:49,913 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:19:49,913 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:19:49,913 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:19:49,913 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:19:49,914 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:19:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states. [2020-12-22 07:19:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:19:49,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:49,944 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] [2020-12-22 07:19:49,944 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:49,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:49,951 INFO L82 PathProgramCache]: Analyzing trace with hash 298975739, now seen corresponding path program 1 times [2020-12-22 07:19:49,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:49,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710655440] [2020-12-22 07:19:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:50,230 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 07:19:50,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710655440] [2020-12-22 07:19:50,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:50,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:19:50,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103982322] [2020-12-22 07:19:50,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:19:50,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:50,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:19:50,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:19:50,260 INFO L87 Difference]: Start difference. First operand 136 states. Second operand 2 states. [2020-12-22 07:19:50,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:50,295 INFO L93 Difference]: Finished difference Result 212 states and 365 transitions. [2020-12-22 07:19:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:19:50,297 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:19:50,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:50,310 INFO L225 Difference]: With dead ends: 212 [2020-12-22 07:19:50,311 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 07:19:50,314 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 07:19:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 07:19:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-12-22 07:19:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 07:19:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 228 transitions. [2020-12-22 07:19:50,405 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 228 transitions. Word has length 37 [2020-12-22 07:19:50,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:50,406 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 228 transitions. [2020-12-22 07:19:50,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:19:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 228 transitions. [2020-12-22 07:19:50,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:19:50,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:50,411 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] [2020-12-22 07:19:50,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:19:50,413 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:50,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:50,414 INFO L82 PathProgramCache]: Analyzing trace with hash -518672711, now seen corresponding path program 1 times [2020-12-22 07:19:50,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:50,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953314522] [2020-12-22 07:19:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:50,576 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 07:19:50,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953314522] [2020-12-22 07:19:50,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:50,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:19:50,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722088796] [2020-12-22 07:19:50,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:19:50,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:50,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:19:50,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:19:50,581 INFO L87 Difference]: Start difference. First operand 132 states and 228 transitions. Second operand 5 states. [2020-12-22 07:19:50,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:50,770 INFO L93 Difference]: Finished difference Result 211 states and 358 transitions. [2020-12-22 07:19:50,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:19:50,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:19:50,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:50,773 INFO L225 Difference]: With dead ends: 211 [2020-12-22 07:19:50,773 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 07:19:50,777 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 07:19:50,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 07:19:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-12-22 07:19:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 07:19:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 201 transitions. [2020-12-22 07:19:50,800 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 201 transitions. Word has length 37 [2020-12-22 07:19:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:50,800 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 201 transitions. [2020-12-22 07:19:50,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:19:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 201 transitions. [2020-12-22 07:19:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:19:50,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:50,807 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] [2020-12-22 07:19:50,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:19:50,810 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:50,812 INFO L82 PathProgramCache]: Analyzing trace with hash -707453694, now seen corresponding path program 1 times [2020-12-22 07:19:50,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:50,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596065493] [2020-12-22 07:19:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:51,048 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 07:19:51,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596065493] [2020-12-22 07:19:51,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:51,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:51,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854095765] [2020-12-22 07:19:51,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:51,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:51,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:51,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:51,055 INFO L87 Difference]: Start difference. First operand 132 states and 201 transitions. Second operand 3 states. [2020-12-22 07:19:51,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:51,139 INFO L93 Difference]: Finished difference Result 273 states and 436 transitions. [2020-12-22 07:19:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:51,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:19:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:51,144 INFO L225 Difference]: With dead ends: 273 [2020-12-22 07:19:51,144 INFO L226 Difference]: Without dead ends: 198 [2020-12-22 07:19:51,145 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 07:19:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-22 07:19:51,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2020-12-22 07:19:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 07:19:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 302 transitions. [2020-12-22 07:19:51,164 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 302 transitions. Word has length 63 [2020-12-22 07:19:51,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:51,165 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 302 transitions. [2020-12-22 07:19:51,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 302 transitions. [2020-12-22 07:19:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:19:51,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:51,168 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] [2020-12-22 07:19:51,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:19:51,168 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:51,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1995563601, now seen corresponding path program 1 times [2020-12-22 07:19:51,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:51,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713310889] [2020-12-22 07:19:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:51,259 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 07:19:51,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713310889] [2020-12-22 07:19:51,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:51,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:51,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374806884] [2020-12-22 07:19:51,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:51,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:51,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:51,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:51,263 INFO L87 Difference]: Start difference. First operand 195 states and 302 transitions. Second operand 3 states. [2020-12-22 07:19:51,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:51,298 INFO L93 Difference]: Finished difference Result 457 states and 730 transitions. [2020-12-22 07:19:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:51,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:19:51,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:51,301 INFO L225 Difference]: With dead ends: 457 [2020-12-22 07:19:51,302 INFO L226 Difference]: Without dead ends: 319 [2020-12-22 07:19:51,303 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 07:19:51,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-12-22 07:19:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 315. [2020-12-22 07:19:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-12-22 07:19:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 496 transitions. [2020-12-22 07:19:51,321 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 496 transitions. Word has length 65 [2020-12-22 07:19:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:51,321 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 496 transitions. [2020-12-22 07:19:51,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 496 transitions. [2020-12-22 07:19:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:19:51,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:51,323 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] [2020-12-22 07:19:51,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:19:51,323 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:51,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2137075392, now seen corresponding path program 1 times [2020-12-22 07:19:51,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:51,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133223943] [2020-12-22 07:19:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:51,402 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 07:19:51,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133223943] [2020-12-22 07:19:51,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:51,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:51,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114601485] [2020-12-22 07:19:51,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:51,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:51,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:51,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:51,405 INFO L87 Difference]: Start difference. First operand 315 states and 496 transitions. Second operand 3 states. [2020-12-22 07:19:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:51,449 INFO L93 Difference]: Finished difference Result 803 states and 1286 transitions. [2020-12-22 07:19:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:51,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:19:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:51,455 INFO L225 Difference]: With dead ends: 803 [2020-12-22 07:19:51,456 INFO L226 Difference]: Without dead ends: 545 [2020-12-22 07:19:51,459 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 07:19:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-12-22 07:19:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 539. [2020-12-22 07:19:51,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-12-22 07:19:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 852 transitions. [2020-12-22 07:19:51,510 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 852 transitions. Word has length 67 [2020-12-22 07:19:51,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:51,512 INFO L481 AbstractCegarLoop]: Abstraction has 539 states and 852 transitions. [2020-12-22 07:19:51,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:51,512 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 852 transitions. [2020-12-22 07:19:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:19:51,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:51,514 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] [2020-12-22 07:19:51,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:19:51,514 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:51,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:51,515 INFO L82 PathProgramCache]: Analyzing trace with hash -544230961, now seen corresponding path program 1 times [2020-12-22 07:19:51,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:51,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69763349] [2020-12-22 07:19:51,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:51,662 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 07:19:51,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69763349] [2020-12-22 07:19:51,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:51,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:19:51,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318823743] [2020-12-22 07:19:51,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:19:51,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:51,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:19:51,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:19:51,665 INFO L87 Difference]: Start difference. First operand 539 states and 852 transitions. Second operand 5 states. [2020-12-22 07:19:51,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:51,886 INFO L93 Difference]: Finished difference Result 2303 states and 3746 transitions. [2020-12-22 07:19:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:19:51,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 07:19:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:51,897 INFO L225 Difference]: With dead ends: 2303 [2020-12-22 07:19:51,897 INFO L226 Difference]: Without dead ends: 1821 [2020-12-22 07:19:51,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:19:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2020-12-22 07:19:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 960. [2020-12-22 07:19:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 960 states. [2020-12-22 07:19:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1532 transitions. [2020-12-22 07:19:51,944 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1532 transitions. Word has length 69 [2020-12-22 07:19:51,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:51,945 INFO L481 AbstractCegarLoop]: Abstraction has 960 states and 1532 transitions. [2020-12-22 07:19:51,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:19:51,945 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1532 transitions. [2020-12-22 07:19:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:19:51,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:51,946 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] [2020-12-22 07:19:51,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:19:51,947 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:51,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1614123231, now seen corresponding path program 1 times [2020-12-22 07:19:51,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:51,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063741945] [2020-12-22 07:19:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:52,013 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 07:19:52,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063741945] [2020-12-22 07:19:52,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:52,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:52,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211471633] [2020-12-22 07:19:52,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:52,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:52,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:52,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:52,016 INFO L87 Difference]: Start difference. First operand 960 states and 1532 transitions. Second operand 4 states. [2020-12-22 07:19:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:52,125 INFO L93 Difference]: Finished difference Result 2793 states and 4533 transitions. [2020-12-22 07:19:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:52,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 07:19:52,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:52,136 INFO L225 Difference]: With dead ends: 2793 [2020-12-22 07:19:52,136 INFO L226 Difference]: Without dead ends: 1890 [2020-12-22 07:19:52,138 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 07:19:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2020-12-22 07:19:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1416. [2020-12-22 07:19:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-12-22 07:19:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2275 transitions. [2020-12-22 07:19:52,214 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2275 transitions. Word has length 70 [2020-12-22 07:19:52,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:52,214 INFO L481 AbstractCegarLoop]: Abstraction has 1416 states and 2275 transitions. [2020-12-22 07:19:52,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:52,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2275 transitions. [2020-12-22 07:19:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:19:52,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:52,216 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] [2020-12-22 07:19:52,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:19:52,217 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:52,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:52,217 INFO L82 PathProgramCache]: Analyzing trace with hash -252040890, now seen corresponding path program 1 times [2020-12-22 07:19:52,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:52,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140305350] [2020-12-22 07:19:52,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:52,360 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 07:19:52,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140305350] [2020-12-22 07:19:52,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:52,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:52,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148222327] [2020-12-22 07:19:52,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:52,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:52,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:52,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:52,363 INFO L87 Difference]: Start difference. First operand 1416 states and 2275 transitions. Second operand 4 states. [2020-12-22 07:19:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:52,509 INFO L93 Difference]: Finished difference Result 4216 states and 6836 transitions. [2020-12-22 07:19:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:52,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 07:19:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:52,524 INFO L225 Difference]: With dead ends: 4216 [2020-12-22 07:19:52,524 INFO L226 Difference]: Without dead ends: 2857 [2020-12-22 07:19:52,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 07:19:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2020-12-22 07:19:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2067. [2020-12-22 07:19:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2067 states. [2020-12-22 07:19:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 3322 transitions. [2020-12-22 07:19:52,625 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 3322 transitions. Word has length 71 [2020-12-22 07:19:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:52,626 INFO L481 AbstractCegarLoop]: Abstraction has 2067 states and 3322 transitions. [2020-12-22 07:19:52,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 3322 transitions. [2020-12-22 07:19:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:19:52,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:52,628 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] [2020-12-22 07:19:52,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:19:52,628 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:52,629 INFO L82 PathProgramCache]: Analyzing trace with hash -630566449, now seen corresponding path program 1 times [2020-12-22 07:19:52,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:52,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804110076] [2020-12-22 07:19:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:52,681 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 07:19:52,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804110076] [2020-12-22 07:19:52,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:52,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:52,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192149487] [2020-12-22 07:19:52,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:52,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:52,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:52,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:52,684 INFO L87 Difference]: Start difference. First operand 2067 states and 3322 transitions. Second operand 3 states. [2020-12-22 07:19:52,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:52,813 INFO L93 Difference]: Finished difference Result 4274 states and 6880 transitions. [2020-12-22 07:19:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:52,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:19:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:52,829 INFO L225 Difference]: With dead ends: 4274 [2020-12-22 07:19:52,830 INFO L226 Difference]: Without dead ends: 3076 [2020-12-22 07:19:52,832 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 07:19:52,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2020-12-22 07:19:52,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 3074. [2020-12-22 07:19:52,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3074 states. [2020-12-22 07:19:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 4900 transitions. [2020-12-22 07:19:52,980 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 4900 transitions. Word has length 72 [2020-12-22 07:19:52,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:52,980 INFO L481 AbstractCegarLoop]: Abstraction has 3074 states and 4900 transitions. [2020-12-22 07:19:52,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:52,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 4900 transitions. [2020-12-22 07:19:52,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:19:52,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:52,982 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] [2020-12-22 07:19:52,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:19:52,983 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:52,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:52,984 INFO L82 PathProgramCache]: Analyzing trace with hash -808156936, now seen corresponding path program 1 times [2020-12-22 07:19:52,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:52,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992730911] [2020-12-22 07:19:52,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:53,044 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 07:19:53,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992730911] [2020-12-22 07:19:53,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:53,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:53,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18561098] [2020-12-22 07:19:53,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:53,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:53,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:53,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:53,047 INFO L87 Difference]: Start difference. First operand 3074 states and 4900 transitions. Second operand 4 states. [2020-12-22 07:19:53,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:53,339 INFO L93 Difference]: Finished difference Result 9240 states and 14853 transitions. [2020-12-22 07:19:53,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:53,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:19:53,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:53,378 INFO L225 Difference]: With dead ends: 9240 [2020-12-22 07:19:53,379 INFO L226 Difference]: Without dead ends: 6354 [2020-12-22 07:19:53,387 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 07:19:53,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6354 states. [2020-12-22 07:19:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6354 to 4698. [2020-12-22 07:19:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4698 states. [2020-12-22 07:19:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 7486 transitions. [2020-12-22 07:19:53,674 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 7486 transitions. Word has length 72 [2020-12-22 07:19:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:53,674 INFO L481 AbstractCegarLoop]: Abstraction has 4698 states and 7486 transitions. [2020-12-22 07:19:53,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:53,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 7486 transitions. [2020-12-22 07:19:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:19:53,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:53,676 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] [2020-12-22 07:19:53,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:19:53,676 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:53,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1968035874, now seen corresponding path program 1 times [2020-12-22 07:19:53,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:53,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492453489] [2020-12-22 07:19:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:53,740 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 07:19:53,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492453489] [2020-12-22 07:19:53,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:53,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:53,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259304377] [2020-12-22 07:19:53,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:53,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:53,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:53,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:53,744 INFO L87 Difference]: Start difference. First operand 4698 states and 7486 transitions. Second operand 3 states. [2020-12-22 07:19:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:54,009 INFO L93 Difference]: Finished difference Result 10286 states and 16464 transitions. [2020-12-22 07:19:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:54,010 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:19:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:54,045 INFO L225 Difference]: With dead ends: 10286 [2020-12-22 07:19:54,046 INFO L226 Difference]: Without dead ends: 6983 [2020-12-22 07:19:54,052 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 07:19:54,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6983 states. [2020-12-22 07:19:54,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6983 to 6981. [2020-12-22 07:19:54,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6981 states. [2020-12-22 07:19:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6981 states to 6981 states and 11071 transitions. [2020-12-22 07:19:54,373 INFO L78 Accepts]: Start accepts. Automaton has 6981 states and 11071 transitions. Word has length 72 [2020-12-22 07:19:54,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:54,373 INFO L481 AbstractCegarLoop]: Abstraction has 6981 states and 11071 transitions. [2020-12-22 07:19:54,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:54,373 INFO L276 IsEmpty]: Start isEmpty. Operand 6981 states and 11071 transitions. [2020-12-22 07:19:54,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:19:54,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:54,374 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] [2020-12-22 07:19:54,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:19:54,375 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:54,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:54,375 INFO L82 PathProgramCache]: Analyzing trace with hash 134390635, now seen corresponding path program 1 times [2020-12-22 07:19:54,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:54,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455686067] [2020-12-22 07:19:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:54,418 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 07:19:54,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455686067] [2020-12-22 07:19:54,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:54,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:54,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75364284] [2020-12-22 07:19:54,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:54,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:54,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:54,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:54,421 INFO L87 Difference]: Start difference. First operand 6981 states and 11071 transitions. Second operand 3 states. [2020-12-22 07:19:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:54,771 INFO L93 Difference]: Finished difference Result 15555 states and 24952 transitions. [2020-12-22 07:19:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:54,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:19:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:54,801 INFO L225 Difference]: With dead ends: 15555 [2020-12-22 07:19:54,801 INFO L226 Difference]: Without dead ends: 10468 [2020-12-22 07:19:54,811 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 07:19:54,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10468 states. [2020-12-22 07:19:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10468 to 10466. [2020-12-22 07:19:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10466 states. [2020-12-22 07:19:55,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10466 states to 10466 states and 16575 transitions. [2020-12-22 07:19:55,303 INFO L78 Accepts]: Start accepts. Automaton has 10466 states and 16575 transitions. Word has length 72 [2020-12-22 07:19:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:55,304 INFO L481 AbstractCegarLoop]: Abstraction has 10466 states and 16575 transitions. [2020-12-22 07:19:55,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:55,304 INFO L276 IsEmpty]: Start isEmpty. Operand 10466 states and 16575 transitions. [2020-12-22 07:19:55,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:19:55,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:55,305 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] [2020-12-22 07:19:55,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:19:55,305 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:55,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:55,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1377255792, now seen corresponding path program 1 times [2020-12-22 07:19:55,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:55,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911701195] [2020-12-22 07:19:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:55,475 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 07:19:55,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911701195] [2020-12-22 07:19:55,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:55,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:55,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916470910] [2020-12-22 07:19:55,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:55,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:55,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:55,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:55,478 INFO L87 Difference]: Start difference. First operand 10466 states and 16575 transitions. Second operand 4 states. [2020-12-22 07:19:56,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:56,505 INFO L93 Difference]: Finished difference Result 31026 states and 49119 transitions. [2020-12-22 07:19:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:56,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:19:56,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:56,553 INFO L225 Difference]: With dead ends: 31026 [2020-12-22 07:19:56,554 INFO L226 Difference]: Without dead ends: 20569 [2020-12-22 07:19:56,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:19:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20569 states. [2020-12-22 07:19:57,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20569 to 20567. [2020-12-22 07:19:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20567 states. [2020-12-22 07:19:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20567 states to 20567 states and 32332 transitions. [2020-12-22 07:19:57,570 INFO L78 Accepts]: Start accepts. Automaton has 20567 states and 32332 transitions. Word has length 74 [2020-12-22 07:19:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:57,570 INFO L481 AbstractCegarLoop]: Abstraction has 20567 states and 32332 transitions. [2020-12-22 07:19:57,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 20567 states and 32332 transitions. [2020-12-22 07:19:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:19:57,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:57,572 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] [2020-12-22 07:19:57,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:19:57,572 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:57,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1916429764, now seen corresponding path program 1 times [2020-12-22 07:19:57,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:57,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495755904] [2020-12-22 07:19:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:57,611 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 07:19:57,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495755904] [2020-12-22 07:19:57,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:57,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:57,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007804064] [2020-12-22 07:19:57,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:57,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:57,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:57,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:57,614 INFO L87 Difference]: Start difference. First operand 20567 states and 32332 transitions. Second operand 3 states. [2020-12-22 07:19:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:59,443 INFO L93 Difference]: Finished difference Result 61663 states and 96934 transitions. [2020-12-22 07:19:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:59,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 07:19:59,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:59,539 INFO L225 Difference]: With dead ends: 61663 [2020-12-22 07:19:59,539 INFO L226 Difference]: Without dead ends: 41124 [2020-12-22 07:19:59,574 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 07:19:59,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41124 states. [2020-12-22 07:20:00,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41124 to 20569. [2020-12-22 07:20:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20569 states. [2020-12-22 07:20:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20569 states to 20569 states and 32334 transitions. [2020-12-22 07:20:00,826 INFO L78 Accepts]: Start accepts. Automaton has 20569 states and 32334 transitions. Word has length 75 [2020-12-22 07:20:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:00,826 INFO L481 AbstractCegarLoop]: Abstraction has 20569 states and 32334 transitions. [2020-12-22 07:20:00,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:00,826 INFO L276 IsEmpty]: Start isEmpty. Operand 20569 states and 32334 transitions. [2020-12-22 07:20:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:20:00,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:00,830 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] [2020-12-22 07:20:00,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:20:00,831 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:00,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:00,832 INFO L82 PathProgramCache]: Analyzing trace with hash 539922453, now seen corresponding path program 1 times [2020-12-22 07:20:00,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:00,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673255539] [2020-12-22 07:20:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:00,968 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 07:20:00,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673255539] [2020-12-22 07:20:00,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:00,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:00,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119517089] [2020-12-22 07:20:00,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:00,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:00,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:00,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:00,971 INFO L87 Difference]: Start difference. First operand 20569 states and 32334 transitions. Second operand 4 states. [2020-12-22 07:20:02,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:02,929 INFO L93 Difference]: Finished difference Result 60967 states and 95802 transitions. [2020-12-22 07:20:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:02,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:20:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:03,039 INFO L225 Difference]: With dead ends: 60967 [2020-12-22 07:20:03,040 INFO L226 Difference]: Without dead ends: 40410 [2020-12-22 07:20:03,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:20:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40410 states. [2020-12-22 07:20:04,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40410 to 40408. [2020-12-22 07:20:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40408 states. [2020-12-22 07:20:04,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40408 states to 40408 states and 63033 transitions. [2020-12-22 07:20:04,994 INFO L78 Accepts]: Start accepts. Automaton has 40408 states and 63033 transitions. Word has length 76 [2020-12-22 07:20:04,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:04,994 INFO L481 AbstractCegarLoop]: Abstraction has 40408 states and 63033 transitions. [2020-12-22 07:20:04,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:04,995 INFO L276 IsEmpty]: Start isEmpty. Operand 40408 states and 63033 transitions. [2020-12-22 07:20:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:20:04,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:04,996 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] [2020-12-22 07:20:04,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:20:04,997 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:04,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:04,997 INFO L82 PathProgramCache]: Analyzing trace with hash 31107364, now seen corresponding path program 1 times [2020-12-22 07:20:04,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:04,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910218231] [2020-12-22 07:20:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:05,087 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 07:20:05,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910218231] [2020-12-22 07:20:05,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:05,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:05,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75400942] [2020-12-22 07:20:05,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:05,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:05,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:05,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:05,090 INFO L87 Difference]: Start difference. First operand 40408 states and 63033 transitions. Second operand 4 states. [2020-12-22 07:20:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:08,311 INFO L93 Difference]: Finished difference Result 119716 states and 186647 transitions. [2020-12-22 07:20:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:08,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:20:08,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:08,456 INFO L225 Difference]: With dead ends: 119716 [2020-12-22 07:20:08,456 INFO L226 Difference]: Without dead ends: 79354 [2020-12-22 07:20:08,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:20:08,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79354 states. [2020-12-22 07:20:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79354 to 79352. [2020-12-22 07:20:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79352 states. [2020-12-22 07:20:12,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79352 states to 79352 states and 122783 transitions. [2020-12-22 07:20:12,035 INFO L78 Accepts]: Start accepts. Automaton has 79352 states and 122783 transitions. Word has length 76 [2020-12-22 07:20:12,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:12,035 INFO L481 AbstractCegarLoop]: Abstraction has 79352 states and 122783 transitions. [2020-12-22 07:20:12,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:12,035 INFO L276 IsEmpty]: Start isEmpty. Operand 79352 states and 122783 transitions. [2020-12-22 07:20:12,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:20:12,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:12,038 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] [2020-12-22 07:20:12,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:20:12,038 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:12,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:12,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1176909096, now seen corresponding path program 1 times [2020-12-22 07:20:12,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:12,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59560708] [2020-12-22 07:20:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:12,077 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 07:20:12,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59560708] [2020-12-22 07:20:12,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:12,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:12,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209143176] [2020-12-22 07:20:12,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:12,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:12,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:12,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:12,080 INFO L87 Difference]: Start difference. First operand 79352 states and 122783 transitions. Second operand 3 states. [2020-12-22 07:20:17,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:17,680 INFO L93 Difference]: Finished difference Result 237932 states and 368157 transitions. [2020-12-22 07:20:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:17,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 07:20:17,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:18,296 INFO L225 Difference]: With dead ends: 237932 [2020-12-22 07:20:18,297 INFO L226 Difference]: Without dead ends: 158654 [2020-12-22 07:20:18,420 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 07:20:18,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158654 states. [2020-12-22 07:20:22,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158654 to 79360. [2020-12-22 07:20:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79360 states. [2020-12-22 07:20:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79360 states to 79360 states and 122791 transitions. [2020-12-22 07:20:22,898 INFO L78 Accepts]: Start accepts. Automaton has 79360 states and 122791 transitions. Word has length 77 [2020-12-22 07:20:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:22,899 INFO L481 AbstractCegarLoop]: Abstraction has 79360 states and 122791 transitions. [2020-12-22 07:20:22,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:22,899 INFO L276 IsEmpty]: Start isEmpty. Operand 79360 states and 122791 transitions. [2020-12-22 07:20:22,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:20:22,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:22,900 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] [2020-12-22 07:20:22,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:20:22,901 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:22,901 INFO L82 PathProgramCache]: Analyzing trace with hash 604186441, now seen corresponding path program 1 times [2020-12-22 07:20:22,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:22,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934825693] [2020-12-22 07:20:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:23,007 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 07:20:23,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934825693] [2020-12-22 07:20:23,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:23,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:23,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535300036] [2020-12-22 07:20:23,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:23,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:23,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:23,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:23,009 INFO L87 Difference]: Start difference. First operand 79360 states and 122791 transitions. Second operand 4 states. [2020-12-22 07:20:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:28,393 INFO L93 Difference]: Finished difference Result 235108 states and 363554 transitions. [2020-12-22 07:20:28,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:28,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:20:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:28,808 INFO L225 Difference]: With dead ends: 235108 [2020-12-22 07:20:28,808 INFO L226 Difference]: Without dead ends: 155803 [2020-12-22 07:20:28,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:20:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155803 states. [2020-12-22 07:20:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155803 to 155801. [2020-12-22 07:20:35,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155801 states. [2020-12-22 07:20:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155801 states to 155801 states and 239045 transitions. [2020-12-22 07:20:35,726 INFO L78 Accepts]: Start accepts. Automaton has 155801 states and 239045 transitions. Word has length 78 [2020-12-22 07:20:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:35,726 INFO L481 AbstractCegarLoop]: Abstraction has 155801 states and 239045 transitions. [2020-12-22 07:20:35,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:35,726 INFO L276 IsEmpty]: Start isEmpty. Operand 155801 states and 239045 transitions. [2020-12-22 07:20:35,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:20:35,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:35,730 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] [2020-12-22 07:20:35,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:20:35,730 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:35,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:35,731 INFO L82 PathProgramCache]: Analyzing trace with hash 120131000, now seen corresponding path program 1 times [2020-12-22 07:20:35,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:35,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253573183] [2020-12-22 07:20:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:35,819 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 07:20:35,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253573183] [2020-12-22 07:20:35,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:35,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:35,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461024341] [2020-12-22 07:20:35,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:35,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:35,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:35,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:35,821 INFO L87 Difference]: Start difference. First operand 155801 states and 239045 transitions. Second operand 4 states. [2020-12-22 07:20:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:47,405 INFO L93 Difference]: Finished difference Result 461429 states and 707439 transitions. [2020-12-22 07:20:47,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:47,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:20:47,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:48,026 INFO L225 Difference]: With dead ends: 461429 [2020-12-22 07:20:48,027 INFO L226 Difference]: Without dead ends: 305787 [2020-12-22 07:20:48,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:20:48,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305787 states. [2020-12-22 07:21:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305787 to 305785. [2020-12-22 07:21:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305785 states. [2020-12-22 07:21:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305785 states to 305785 states and 465045 transitions. [2020-12-22 07:21:02,074 INFO L78 Accepts]: Start accepts. Automaton has 305785 states and 465045 transitions. Word has length 78 [2020-12-22 07:21:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:02,074 INFO L481 AbstractCegarLoop]: Abstraction has 305785 states and 465045 transitions. [2020-12-22 07:21:02,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 305785 states and 465045 transitions. [2020-12-22 07:21:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:21:02,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:02,088 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] [2020-12-22 07:21:02,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:21:02,089 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:02,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:02,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1883818476, now seen corresponding path program 1 times [2020-12-22 07:21:02,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:02,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682143679] [2020-12-22 07:21:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:02,127 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 07:21:02,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682143679] [2020-12-22 07:21:02,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:02,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:02,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110112354] [2020-12-22 07:21:02,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:02,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:02,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:02,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:02,131 INFO L87 Difference]: Start difference. First operand 305785 states and 465045 transitions. Second operand 3 states. [2020-12-22 07:21:24,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:24,807 INFO L93 Difference]: Finished difference Result 916061 states and 1393543 transitions. [2020-12-22 07:21:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:24,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:21:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:26,066 INFO L225 Difference]: With dead ends: 916061 [2020-12-22 07:21:26,066 INFO L226 Difference]: Without dead ends: 611339 [2020-12-22 07:21:26,650 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 07:21:27,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611339 states. [2020-12-22 07:21:45,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611339 to 305817. [2020-12-22 07:21:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305817 states. [2020-12-22 07:21:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305817 states to 305817 states and 465077 transitions. [2020-12-22 07:21:46,616 INFO L78 Accepts]: Start accepts. Automaton has 305817 states and 465077 transitions. Word has length 79 [2020-12-22 07:21:46,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:46,616 INFO L481 AbstractCegarLoop]: Abstraction has 305817 states and 465077 transitions. [2020-12-22 07:21:46,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:46,617 INFO L276 IsEmpty]: Start isEmpty. Operand 305817 states and 465077 transitions. [2020-12-22 07:21:46,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:21:46,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:46,641 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] [2020-12-22 07:21:46,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:21:46,642 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:46,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:46,642 INFO L82 PathProgramCache]: Analyzing trace with hash 809988221, now seen corresponding path program 1 times [2020-12-22 07:21:46,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:46,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547363421] [2020-12-22 07:21:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:46,846 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 07:21:46,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547363421] [2020-12-22 07:21:46,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:46,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:46,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249121633] [2020-12-22 07:21:46,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:46,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:46,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:46,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:46,848 INFO L87 Difference]: Start difference. First operand 305817 states and 465077 transitions. Second operand 4 states. [2020-12-22 07:22:13,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:13,263 INFO L93 Difference]: Finished difference Result 905584 states and 1376019 transitions. [2020-12-22 07:22:13,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:13,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-12-22 07:22:13,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:14,787 INFO L225 Difference]: With dead ends: 905584 [2020-12-22 07:22:14,787 INFO L226 Difference]: Without dead ends: 600018 [2020-12-22 07:22:15,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:22:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600018 states. [2020-12-22 07:22:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600018 to 600016. [2020-12-22 07:22:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600016 states. [2020-12-22 07:22:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600016 states to 600016 states and 904133 transitions. [2020-12-22 07:22:50,347 INFO L78 Accepts]: Start accepts. Automaton has 600016 states and 904133 transitions. Word has length 80 [2020-12-22 07:22:50,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:50,350 INFO L481 AbstractCegarLoop]: Abstraction has 600016 states and 904133 transitions. [2020-12-22 07:22:50,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:50,351 INFO L276 IsEmpty]: Start isEmpty. Operand 600016 states and 904133 transitions. [2020-12-22 07:22:50,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:22:50,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:50,400 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] [2020-12-22 07:22:50,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:22:50,400 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash -715330484, now seen corresponding path program 1 times [2020-12-22 07:22:50,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:50,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766879032] [2020-12-22 07:22:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:50,546 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 07:22:50,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766879032] [2020-12-22 07:22:50,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:50,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:50,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951207810] [2020-12-22 07:22:50,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:50,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:50,553 INFO L87 Difference]: Start difference. First operand 600016 states and 904133 transitions. Second operand 4 states. [2020-12-22 07:23:10,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:10,962 INFO L93 Difference]: Finished difference Result 981726 states and 1475874 transitions. [2020-12-22 07:23:10,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:10,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-12-22 07:23:10,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:11,746 INFO L225 Difference]: With dead ends: 981726 [2020-12-22 07:23:11,746 INFO L226 Difference]: Without dead ends: 382137 [2020-12-22 07:23:12,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20