/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/systemc/token_ring.07.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:09:05,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:09:05,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:09:05,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:09:05,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:09:05,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:09:05,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:09:05,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:09:05,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:09:05,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:09:05,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:09:05,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:09:05,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:09:05,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:09:05,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:09:05,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:09:05,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:09:05,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:09:05,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:09:05,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:09:05,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:09:05,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:09:05,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:09:05,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:09:05,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:09:05,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:09:05,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:09:05,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:09:05,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:09:05,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:09:05,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:09:05,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:09:05,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:09:05,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:09:05,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:09:05,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:09:05,457 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:09:05,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:09:05,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:09:05,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:09:05,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:09:05,516 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:09:05,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:09:05,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:09:05,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:09:05,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:09:05,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:09:05,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:09:05,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:09:05,519 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:09:05,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:09:05,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:09:05,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:09:05,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:09:05,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:09:05,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:09:05,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:09:05,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:09:05,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:09:05,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:09:05,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:09:05,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:09:05,522 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:09:05,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:09:05,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:09:05,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:09:05,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:09:05,973 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:09:05,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.07.cil-1.c [2020-12-22 07:09:06,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1317beb06/15e370c384b04901be2f95e40a413ac5/FLAG2e26c644e [2020-12-22 07:09:06,651 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:09:06,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.07.cil-1.c [2020-12-22 07:09:06,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1317beb06/15e370c384b04901be2f95e40a413ac5/FLAG2e26c644e [2020-12-22 07:09:06,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1317beb06/15e370c384b04901be2f95e40a413ac5 [2020-12-22 07:09:07,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:09:07,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:09:07,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:09:07,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:09:07,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:09:07,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:09:06" (1/1) ... [2020-12-22 07:09:07,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c8f0c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:07, skipping insertion in model container [2020-12-22 07:09:07,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:09:06" (1/1) ... [2020-12-22 07:09:07,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:09:07,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:09:07,315 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/systemc/token_ring.07.cil-1.c[366,379] [2020-12-22 07:09:07,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:09:07,467 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:09:07,480 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/systemc/token_ring.07.cil-1.c[366,379] [2020-12-22 07:09:07,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:09:07,599 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:09:07,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:07 WrapperNode [2020-12-22 07:09:07,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:09:07,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:09:07,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:09:07,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:09:07,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:07" (1/1) ... [2020-12-22 07:09:07,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:07" (1/1) ... [2020-12-22 07:09:07,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:09:07,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:09:07,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:09:07,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:09:07,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:07" (1/1) ... [2020-12-22 07:09:07,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:07" (1/1) ... [2020-12-22 07:09:07,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:07" (1/1) ... [2020-12-22 07:09:07,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:07" (1/1) ... [2020-12-22 07:09:07,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:07" (1/1) ... [2020-12-22 07:09:07,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:07" (1/1) ... [2020-12-22 07:09:07,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:07" (1/1) ... [2020-12-22 07:09:07,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:09:07,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:09:07,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:09:07,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:09:07,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:07" (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 07:09:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:09:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:09:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:09:08,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:09:09,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:09:09,974 INFO L299 CfgBuilder]: Removed 278 assume(true) statements. [2020-12-22 07:09:09,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:09:09 BoogieIcfgContainer [2020-12-22 07:09:09,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:09:09,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:09:09,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:09:09,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:09:09,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:09:06" (1/3) ... [2020-12-22 07:09:09,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2484c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:09:09, skipping insertion in model container [2020-12-22 07:09:09,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:07" (2/3) ... [2020-12-22 07:09:09,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2484c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:09:09, skipping insertion in model container [2020-12-22 07:09:09,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:09:09" (3/3) ... [2020-12-22 07:09:09,987 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.07.cil-1.c [2020-12-22 07:09:09,993 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:09:09,999 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:09:10,019 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:09:10,051 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:09:10,051 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:09:10,051 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:09:10,051 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:09:10,052 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:09:10,052 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:09:10,052 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:09:10,052 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:09:10,083 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-12-22 07:09:10,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:10,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:10,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:10,097 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:10,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:10,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1880548039, now seen corresponding path program 1 times [2020-12-22 07:09:10,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:10,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880714412] [2020-12-22 07:09:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:10,360 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 07:09:10,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880714412] [2020-12-22 07:09:10,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:10,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:10,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893529042] [2020-12-22 07:09:10,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:10,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:10,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:10,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:10,384 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 3 states. [2020-12-22 07:09:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:10,497 INFO L93 Difference]: Finished difference Result 1621 states and 2483 transitions. [2020-12-22 07:09:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:10,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 07:09:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:10,523 INFO L225 Difference]: With dead ends: 1621 [2020-12-22 07:09:10,523 INFO L226 Difference]: Without dead ends: 809 [2020-12-22 07:09:10,538 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 07:09:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2020-12-22 07:09:10,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 809. [2020-12-22 07:09:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2020-12-22 07:09:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1219 transitions. [2020-12-22 07:09:10,663 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1219 transitions. Word has length 105 [2020-12-22 07:09:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:10,663 INFO L481 AbstractCegarLoop]: Abstraction has 809 states and 1219 transitions. [2020-12-22 07:09:10,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1219 transitions. [2020-12-22 07:09:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:10,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:10,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:10,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:09:10,666 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:10,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:10,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1107276859, now seen corresponding path program 1 times [2020-12-22 07:09:10,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:10,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653134309] [2020-12-22 07:09:10,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:10,833 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 07:09:10,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653134309] [2020-12-22 07:09:10,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:10,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:10,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419327648] [2020-12-22 07:09:10,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:10,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:10,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:10,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:10,838 INFO L87 Difference]: Start difference. First operand 809 states and 1219 transitions. Second operand 3 states. [2020-12-22 07:09:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:10,928 INFO L93 Difference]: Finished difference Result 2259 states and 3393 transitions. [2020-12-22 07:09:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:10,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 07:09:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:10,938 INFO L225 Difference]: With dead ends: 2259 [2020-12-22 07:09:10,938 INFO L226 Difference]: Without dead ends: 1462 [2020-12-22 07:09:10,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:10,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2020-12-22 07:09:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1460. [2020-12-22 07:09:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2189 transitions. [2020-12-22 07:09:11,005 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2189 transitions. Word has length 105 [2020-12-22 07:09:11,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:11,006 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2189 transitions. [2020-12-22 07:09:11,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2189 transitions. [2020-12-22 07:09:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:11,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:11,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:11,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:09:11,009 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:11,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:11,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1591347777, now seen corresponding path program 1 times [2020-12-22 07:09:11,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:11,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447256675] [2020-12-22 07:09:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:11,096 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 07:09:11,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447256675] [2020-12-22 07:09:11,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:11,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:11,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350697249] [2020-12-22 07:09:11,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:11,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:11,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:11,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:11,100 INFO L87 Difference]: Start difference. First operand 1460 states and 2189 transitions. Second operand 4 states. [2020-12-22 07:09:11,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:11,263 INFO L93 Difference]: Finished difference Result 3557 states and 5324 transitions. [2020-12-22 07:09:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:11,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 07:09:11,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:11,275 INFO L225 Difference]: With dead ends: 3557 [2020-12-22 07:09:11,275 INFO L226 Difference]: Without dead ends: 2111 [2020-12-22 07:09:11,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2020-12-22 07:09:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1460. [2020-12-22 07:09:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2186 transitions. [2020-12-22 07:09:11,390 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2186 transitions. Word has length 105 [2020-12-22 07:09:11,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:11,397 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2186 transitions. [2020-12-22 07:09:11,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:11,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2186 transitions. [2020-12-22 07:09:11,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:11,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:11,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:11,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:09:11,407 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:11,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:11,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1562847487, now seen corresponding path program 1 times [2020-12-22 07:09:11,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:11,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643072097] [2020-12-22 07:09:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:11,508 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 07:09:11,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643072097] [2020-12-22 07:09:11,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:11,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:11,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029742208] [2020-12-22 07:09:11,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:11,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:11,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:11,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:11,512 INFO L87 Difference]: Start difference. First operand 1460 states and 2186 transitions. Second operand 4 states. [2020-12-22 07:09:11,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:11,694 INFO L93 Difference]: Finished difference Result 3555 states and 5314 transitions. [2020-12-22 07:09:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:11,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 07:09:11,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:11,707 INFO L225 Difference]: With dead ends: 3555 [2020-12-22 07:09:11,707 INFO L226 Difference]: Without dead ends: 2110 [2020-12-22 07:09:11,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:11,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2020-12-22 07:09:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1460. [2020-12-22 07:09:11,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:11,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2183 transitions. [2020-12-22 07:09:11,796 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2183 transitions. Word has length 105 [2020-12-22 07:09:11,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:11,796 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2183 transitions. [2020-12-22 07:09:11,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2183 transitions. [2020-12-22 07:09:11,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:11,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:11,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:11,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:09:11,800 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash -377734527, now seen corresponding path program 1 times [2020-12-22 07:09:11,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:11,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605341701] [2020-12-22 07:09:11,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:11,859 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 07:09:11,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605341701] [2020-12-22 07:09:11,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:11,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:11,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962209492] [2020-12-22 07:09:11,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:11,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:11,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:11,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:11,862 INFO L87 Difference]: Start difference. First operand 1460 states and 2183 transitions. Second operand 3 states. [2020-12-22 07:09:11,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:11,968 INFO L93 Difference]: Finished difference Result 2904 states and 4341 transitions. [2020-12-22 07:09:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:11,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 07:09:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:11,976 INFO L225 Difference]: With dead ends: 2904 [2020-12-22 07:09:11,976 INFO L226 Difference]: Without dead ends: 1460 [2020-12-22 07:09:11,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-12-22 07:09:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2020-12-22 07:09:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2175 transitions. [2020-12-22 07:09:12,055 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2175 transitions. Word has length 105 [2020-12-22 07:09:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:12,055 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2175 transitions. [2020-12-22 07:09:12,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2175 transitions. [2020-12-22 07:09:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:12,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:12,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:12,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:09:12,057 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:12,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:12,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1561368317, now seen corresponding path program 1 times [2020-12-22 07:09:12,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:12,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148688907] [2020-12-22 07:09:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:12,106 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 07:09:12,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148688907] [2020-12-22 07:09:12,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:12,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:12,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674231381] [2020-12-22 07:09:12,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:12,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:12,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:12,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:12,108 INFO L87 Difference]: Start difference. First operand 1460 states and 2175 transitions. Second operand 3 states. [2020-12-22 07:09:12,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:12,200 INFO L93 Difference]: Finished difference Result 2903 states and 4324 transitions. [2020-12-22 07:09:12,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:12,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 07:09:12,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:12,208 INFO L225 Difference]: With dead ends: 2903 [2020-12-22 07:09:12,208 INFO L226 Difference]: Without dead ends: 1460 [2020-12-22 07:09:12,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:12,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-12-22 07:09:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2020-12-22 07:09:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:12,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2167 transitions. [2020-12-22 07:09:12,288 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2167 transitions. Word has length 105 [2020-12-22 07:09:12,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:12,288 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2167 transitions. [2020-12-22 07:09:12,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:12,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2167 transitions. [2020-12-22 07:09:12,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:12,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:12,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:12,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:09:12,291 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:12,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:12,291 INFO L82 PathProgramCache]: Analyzing trace with hash 931183361, now seen corresponding path program 1 times [2020-12-22 07:09:12,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:12,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771643844] [2020-12-22 07:09:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:12,366 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 07:09:12,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771643844] [2020-12-22 07:09:12,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:12,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:12,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13384049] [2020-12-22 07:09:12,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:12,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:12,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:12,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:12,369 INFO L87 Difference]: Start difference. First operand 1460 states and 2167 transitions. Second operand 4 states. [2020-12-22 07:09:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:12,560 INFO L93 Difference]: Finished difference Result 3549 states and 5262 transitions. [2020-12-22 07:09:12,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:12,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 07:09:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:12,571 INFO L225 Difference]: With dead ends: 3549 [2020-12-22 07:09:12,571 INFO L226 Difference]: Without dead ends: 2107 [2020-12-22 07:09:12,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2020-12-22 07:09:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1460. [2020-12-22 07:09:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2164 transitions. [2020-12-22 07:09:12,659 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2164 transitions. Word has length 105 [2020-12-22 07:09:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:12,659 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2164 transitions. [2020-12-22 07:09:12,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2164 transitions. [2020-12-22 07:09:12,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:12,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:12,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:12,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:09:12,662 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:12,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:12,662 INFO L82 PathProgramCache]: Analyzing trace with hash -63510337, now seen corresponding path program 1 times [2020-12-22 07:09:12,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:12,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399242812] [2020-12-22 07:09:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:12,708 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 07:09:12,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399242812] [2020-12-22 07:09:12,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:12,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:12,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981251236] [2020-12-22 07:09:12,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:12,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:12,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:12,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:12,711 INFO L87 Difference]: Start difference. First operand 1460 states and 2164 transitions. Second operand 4 states. [2020-12-22 07:09:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:12,916 INFO L93 Difference]: Finished difference Result 3547 states and 5252 transitions. [2020-12-22 07:09:12,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:12,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 07:09:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:12,926 INFO L225 Difference]: With dead ends: 3547 [2020-12-22 07:09:12,927 INFO L226 Difference]: Without dead ends: 2106 [2020-12-22 07:09:12,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2020-12-22 07:09:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1460. [2020-12-22 07:09:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2161 transitions. [2020-12-22 07:09:13,019 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2161 transitions. Word has length 105 [2020-12-22 07:09:13,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:13,019 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2161 transitions. [2020-12-22 07:09:13,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:13,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2161 transitions. [2020-12-22 07:09:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:13,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:13,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:13,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:09:13,021 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:13,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:13,022 INFO L82 PathProgramCache]: Analyzing trace with hash -649786559, now seen corresponding path program 1 times [2020-12-22 07:09:13,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:13,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142396516] [2020-12-22 07:09:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:13,065 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 07:09:13,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142396516] [2020-12-22 07:09:13,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:13,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:13,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182229671] [2020-12-22 07:09:13,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:13,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:13,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:13,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:13,068 INFO L87 Difference]: Start difference. First operand 1460 states and 2161 transitions. Second operand 4 states. [2020-12-22 07:09:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:13,314 INFO L93 Difference]: Finished difference Result 3489 states and 5162 transitions. [2020-12-22 07:09:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:13,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 07:09:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:13,325 INFO L225 Difference]: With dead ends: 3489 [2020-12-22 07:09:13,325 INFO L226 Difference]: Without dead ends: 2049 [2020-12-22 07:09:13,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:13,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2020-12-22 07:09:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1460. [2020-12-22 07:09:13,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2158 transitions. [2020-12-22 07:09:13,424 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2158 transitions. Word has length 105 [2020-12-22 07:09:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:13,424 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2158 transitions. [2020-12-22 07:09:13,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:13,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2158 transitions. [2020-12-22 07:09:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:13,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:13,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:13,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:09:13,426 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:13,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1686605951, now seen corresponding path program 1 times [2020-12-22 07:09:13,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:13,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896278789] [2020-12-22 07:09:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:13,494 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 07:09:13,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896278789] [2020-12-22 07:09:13,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:13,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:13,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619449687] [2020-12-22 07:09:13,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:13,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:13,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:13,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:13,497 INFO L87 Difference]: Start difference. First operand 1460 states and 2158 transitions. Second operand 3 states. [2020-12-22 07:09:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:13,634 INFO L93 Difference]: Finished difference Result 2898 states and 4284 transitions. [2020-12-22 07:09:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:13,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 07:09:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:13,642 INFO L225 Difference]: With dead ends: 2898 [2020-12-22 07:09:13,643 INFO L226 Difference]: Without dead ends: 1460 [2020-12-22 07:09:13,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-12-22 07:09:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2020-12-22 07:09:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:13,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2132 transitions. [2020-12-22 07:09:13,736 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2132 transitions. Word has length 105 [2020-12-22 07:09:13,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:13,737 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2132 transitions. [2020-12-22 07:09:13,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:13,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2132 transitions. [2020-12-22 07:09:13,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:13,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:13,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:13,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:09:13,739 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:13,739 INFO L82 PathProgramCache]: Analyzing trace with hash -192524995, now seen corresponding path program 1 times [2020-12-22 07:09:13,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:13,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553503668] [2020-12-22 07:09:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:13,781 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 07:09:13,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553503668] [2020-12-22 07:09:13,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:13,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:13,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471839304] [2020-12-22 07:09:13,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:13,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:13,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:13,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:13,784 INFO L87 Difference]: Start difference. First operand 1460 states and 2132 transitions. Second operand 4 states. [2020-12-22 07:09:14,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:14,052 INFO L93 Difference]: Finished difference Result 3483 states and 5084 transitions. [2020-12-22 07:09:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:14,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 07:09:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:14,063 INFO L225 Difference]: With dead ends: 3483 [2020-12-22 07:09:14,063 INFO L226 Difference]: Without dead ends: 2046 [2020-12-22 07:09:14,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2020-12-22 07:09:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1460. [2020-12-22 07:09:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2129 transitions. [2020-12-22 07:09:14,159 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2129 transitions. Word has length 105 [2020-12-22 07:09:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:14,159 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2129 transitions. [2020-12-22 07:09:14,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2129 transitions. [2020-12-22 07:09:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:14,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:14,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:14,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:09:14,161 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:14,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:14,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1132331199, now seen corresponding path program 1 times [2020-12-22 07:09:14,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:14,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047184939] [2020-12-22 07:09:14,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:14,202 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 07:09:14,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047184939] [2020-12-22 07:09:14,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:14,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:14,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082261344] [2020-12-22 07:09:14,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:14,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:14,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:14,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:14,204 INFO L87 Difference]: Start difference. First operand 1460 states and 2129 transitions. Second operand 4 states. [2020-12-22 07:09:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:14,468 INFO L93 Difference]: Finished difference Result 3481 states and 5074 transitions. [2020-12-22 07:09:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:14,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 07:09:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:14,479 INFO L225 Difference]: With dead ends: 3481 [2020-12-22 07:09:14,479 INFO L226 Difference]: Without dead ends: 2045 [2020-12-22 07:09:14,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:14,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2020-12-22 07:09:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1460. [2020-12-22 07:09:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2126 transitions. [2020-12-22 07:09:14,602 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2126 transitions. Word has length 105 [2020-12-22 07:09:14,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:14,602 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2126 transitions. [2020-12-22 07:09:14,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2126 transitions. [2020-12-22 07:09:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:14,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:14,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:14,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:09:14,604 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1595878147, now seen corresponding path program 1 times [2020-12-22 07:09:14,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:14,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940151140] [2020-12-22 07:09:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:14,657 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 07:09:14,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940151140] [2020-12-22 07:09:14,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:14,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:14,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727552220] [2020-12-22 07:09:14,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:14,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:14,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:14,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:14,660 INFO L87 Difference]: Start difference. First operand 1460 states and 2126 transitions. Second operand 4 states. [2020-12-22 07:09:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:14,981 INFO L93 Difference]: Finished difference Result 3479 states and 5064 transitions. [2020-12-22 07:09:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:14,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 07:09:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:14,994 INFO L225 Difference]: With dead ends: 3479 [2020-12-22 07:09:14,995 INFO L226 Difference]: Without dead ends: 2044 [2020-12-22 07:09:14,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:15,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2020-12-22 07:09:15,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1460. [2020-12-22 07:09:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2123 transitions. [2020-12-22 07:09:15,177 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2123 transitions. Word has length 105 [2020-12-22 07:09:15,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:15,177 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2123 transitions. [2020-12-22 07:09:15,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:15,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2123 transitions. [2020-12-22 07:09:15,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:15,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:15,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:15,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:09:15,179 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:15,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1641251071, now seen corresponding path program 1 times [2020-12-22 07:09:15,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:15,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122275721] [2020-12-22 07:09:15,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:15,260 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 07:09:15,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122275721] [2020-12-22 07:09:15,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:15,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:15,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334335961] [2020-12-22 07:09:15,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:15,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:15,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:15,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:15,264 INFO L87 Difference]: Start difference. First operand 1460 states and 2123 transitions. Second operand 4 states. [2020-12-22 07:09:15,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:15,578 INFO L93 Difference]: Finished difference Result 3477 states and 5054 transitions. [2020-12-22 07:09:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:15,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 07:09:15,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:15,590 INFO L225 Difference]: With dead ends: 3477 [2020-12-22 07:09:15,590 INFO L226 Difference]: Without dead ends: 2043 [2020-12-22 07:09:15,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:15,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2020-12-22 07:09:15,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1460. [2020-12-22 07:09:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2120 transitions. [2020-12-22 07:09:15,705 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2120 transitions. Word has length 105 [2020-12-22 07:09:15,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:15,705 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2120 transitions. [2020-12-22 07:09:15,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2120 transitions. [2020-12-22 07:09:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:15,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:15,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:15,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:09:15,707 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:15,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:15,708 INFO L82 PathProgramCache]: Analyzing trace with hash 498748605, now seen corresponding path program 1 times [2020-12-22 07:09:15,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:15,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193010703] [2020-12-22 07:09:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:15,750 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 07:09:15,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193010703] [2020-12-22 07:09:15,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:15,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:15,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486738044] [2020-12-22 07:09:15,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:15,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:15,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:15,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:15,752 INFO L87 Difference]: Start difference. First operand 1460 states and 2120 transitions. Second operand 4 states. [2020-12-22 07:09:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:16,039 INFO L93 Difference]: Finished difference Result 3475 states and 5044 transitions. [2020-12-22 07:09:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:16,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 07:09:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:16,062 INFO L225 Difference]: With dead ends: 3475 [2020-12-22 07:09:16,062 INFO L226 Difference]: Without dead ends: 2042 [2020-12-22 07:09:16,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2020-12-22 07:09:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1460. [2020-12-22 07:09:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2020-12-22 07:09:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2117 transitions. [2020-12-22 07:09:16,180 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2117 transitions. Word has length 105 [2020-12-22 07:09:16,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:16,180 INFO L481 AbstractCegarLoop]: Abstraction has 1460 states and 2117 transitions. [2020-12-22 07:09:16,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2117 transitions. [2020-12-22 07:09:16,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:16,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:16,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:16,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:09:16,182 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:16,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:16,183 INFO L82 PathProgramCache]: Analyzing trace with hash 738988351, now seen corresponding path program 1 times [2020-12-22 07:09:16,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:16,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211831333] [2020-12-22 07:09:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:16,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211831333] [2020-12-22 07:09:16,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:16,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:16,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712597393] [2020-12-22 07:09:16,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:16,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:16,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:16,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:16,249 INFO L87 Difference]: Start difference. First operand 1460 states and 2117 transitions. Second operand 5 states. [2020-12-22 07:09:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:16,784 INFO L93 Difference]: Finished difference Result 5570 states and 8068 transitions. [2020-12-22 07:09:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:16,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-12-22 07:09:16,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:16,794 INFO L225 Difference]: With dead ends: 5570 [2020-12-22 07:09:16,794 INFO L226 Difference]: Without dead ends: 4144 [2020-12-22 07:09:16,798 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 07:09:16,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2020-12-22 07:09:16,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 1520. [2020-12-22 07:09:16,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1520 states. [2020-12-22 07:09:16,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2177 transitions. [2020-12-22 07:09:16,944 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2177 transitions. Word has length 105 [2020-12-22 07:09:16,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:16,944 INFO L481 AbstractCegarLoop]: Abstraction has 1520 states and 2177 transitions. [2020-12-22 07:09:16,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:16,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2177 transitions. [2020-12-22 07:09:16,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:09:16,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:16,946 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:16,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:09:16,946 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:16,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:16,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1172054207, now seen corresponding path program 1 times [2020-12-22 07:09:16,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:16,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377579262] [2020-12-22 07:09:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:17,013 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 07:09:17,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377579262] [2020-12-22 07:09:17,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:17,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:17,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577919960] [2020-12-22 07:09:17,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:17,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:17,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:17,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:17,016 INFO L87 Difference]: Start difference. First operand 1520 states and 2177 transitions. Second operand 4 states. [2020-12-22 07:09:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:17,580 INFO L93 Difference]: Finished difference Result 5590 states and 7990 transitions. [2020-12-22 07:09:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:17,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 07:09:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:17,590 INFO L225 Difference]: With dead ends: 5590 [2020-12-22 07:09:17,590 INFO L226 Difference]: Without dead ends: 4099 [2020-12-22 07:09:17,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:17,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2020-12-22 07:09:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3885. [2020-12-22 07:09:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3885 states. [2020-12-22 07:09:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 5504 transitions. [2020-12-22 07:09:17,957 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 5504 transitions. Word has length 105 [2020-12-22 07:09:17,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:17,957 INFO L481 AbstractCegarLoop]: Abstraction has 3885 states and 5504 transitions. [2020-12-22 07:09:17,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 5504 transitions. [2020-12-22 07:09:17,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 07:09:17,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:17,960 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:17,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:09:17,960 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:17,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1427849594, now seen corresponding path program 1 times [2020-12-22 07:09:17,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:17,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736778068] [2020-12-22 07:09:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:18,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736778068] [2020-12-22 07:09:18,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:18,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:18,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356720093] [2020-12-22 07:09:18,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:18,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:18,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:18,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:18,009 INFO L87 Difference]: Start difference. First operand 3885 states and 5504 transitions. Second operand 5 states. [2020-12-22 07:09:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:18,740 INFO L93 Difference]: Finished difference Result 10206 states and 14508 transitions. [2020-12-22 07:09:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:18,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2020-12-22 07:09:18,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:18,764 INFO L225 Difference]: With dead ends: 10206 [2020-12-22 07:09:18,764 INFO L226 Difference]: Without dead ends: 6360 [2020-12-22 07:09:18,773 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 07:09:18,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6360 states. [2020-12-22 07:09:19,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6360 to 3942. [2020-12-22 07:09:19,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3942 states. [2020-12-22 07:09:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 5528 transitions. [2020-12-22 07:09:19,164 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 5528 transitions. Word has length 123 [2020-12-22 07:09:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:19,165 INFO L481 AbstractCegarLoop]: Abstraction has 3942 states and 5528 transitions. [2020-12-22 07:09:19,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:19,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 5528 transitions. [2020-12-22 07:09:19,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 07:09:19,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:19,167 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:19,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:09:19,168 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:19,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash -990634884, now seen corresponding path program 1 times [2020-12-22 07:09:19,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:19,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652216210] [2020-12-22 07:09:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:19,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652216210] [2020-12-22 07:09:19,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:19,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:19,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316862736] [2020-12-22 07:09:19,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:19,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:19,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:19,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:19,233 INFO L87 Difference]: Start difference. First operand 3942 states and 5528 transitions. Second operand 5 states. [2020-12-22 07:09:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:19,918 INFO L93 Difference]: Finished difference Result 8784 states and 12291 transitions. [2020-12-22 07:09:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:19,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2020-12-22 07:09:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:19,930 INFO L225 Difference]: With dead ends: 8784 [2020-12-22 07:09:19,930 INFO L226 Difference]: Without dead ends: 4888 [2020-12-22 07:09:19,936 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 07:09:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4888 states. [2020-12-22 07:09:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4888 to 3948. [2020-12-22 07:09:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3948 states. [2020-12-22 07:09:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3948 states to 3948 states and 5484 transitions. [2020-12-22 07:09:20,332 INFO L78 Accepts]: Start accepts. Automaton has 3948 states and 5484 transitions. Word has length 123 [2020-12-22 07:09:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:20,332 INFO L481 AbstractCegarLoop]: Abstraction has 3948 states and 5484 transitions. [2020-12-22 07:09:20,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3948 states and 5484 transitions. [2020-12-22 07:09:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 07:09:20,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:20,335 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:20,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:09:20,335 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:20,336 INFO L82 PathProgramCache]: Analyzing trace with hash -750395138, now seen corresponding path program 1 times [2020-12-22 07:09:20,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:20,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153398717] [2020-12-22 07:09:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:20,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153398717] [2020-12-22 07:09:20,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:20,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:20,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845244996] [2020-12-22 07:09:20,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:20,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:20,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:20,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:20,390 INFO L87 Difference]: Start difference. First operand 3948 states and 5484 transitions. Second operand 4 states. [2020-12-22 07:09:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:21,451 INFO L93 Difference]: Finished difference Result 14815 states and 20566 transitions. [2020-12-22 07:09:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:21,451 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-12-22 07:09:21,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:21,479 INFO L225 Difference]: With dead ends: 14815 [2020-12-22 07:09:21,480 INFO L226 Difference]: Without dead ends: 10915 [2020-12-22 07:09:21,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:21,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10915 states. [2020-12-22 07:09:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10915 to 10443. [2020-12-22 07:09:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10443 states. [2020-12-22 07:09:22,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10443 states to 10443 states and 14381 transitions. [2020-12-22 07:09:22,325 INFO L78 Accepts]: Start accepts. Automaton has 10443 states and 14381 transitions. Word has length 123 [2020-12-22 07:09:22,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:22,325 INFO L481 AbstractCegarLoop]: Abstraction has 10443 states and 14381 transitions. [2020-12-22 07:09:22,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:22,325 INFO L276 IsEmpty]: Start isEmpty. Operand 10443 states and 14381 transitions. [2020-12-22 07:09:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:09:22,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:22,329 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:22,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:09:22,330 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:22,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:22,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1357225913, now seen corresponding path program 1 times [2020-12-22 07:09:22,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:22,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302901246] [2020-12-22 07:09:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:22,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302901246] [2020-12-22 07:09:22,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:22,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:22,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104841098] [2020-12-22 07:09:22,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:22,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:22,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:22,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:22,393 INFO L87 Difference]: Start difference. First operand 10443 states and 14381 transitions. Second operand 5 states. [2020-12-22 07:09:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:23,748 INFO L93 Difference]: Finished difference Result 26880 states and 37268 transitions. [2020-12-22 07:09:23,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:23,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-12-22 07:09:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:23,784 INFO L225 Difference]: With dead ends: 26880 [2020-12-22 07:09:23,785 INFO L226 Difference]: Without dead ends: 16489 [2020-12-22 07:09:23,798 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 07:09:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16489 states. [2020-12-22 07:09:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16489 to 10596. [2020-12-22 07:09:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10596 states. [2020-12-22 07:09:24,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10596 states to 10596 states and 14447 transitions. [2020-12-22 07:09:24,711 INFO L78 Accepts]: Start accepts. Automaton has 10596 states and 14447 transitions. Word has length 127 [2020-12-22 07:09:24,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:24,711 INFO L481 AbstractCegarLoop]: Abstraction has 10596 states and 14447 transitions. [2020-12-22 07:09:24,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:24,711 INFO L276 IsEmpty]: Start isEmpty. Operand 10596 states and 14447 transitions. [2020-12-22 07:09:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:09:24,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:24,714 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:24,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:09:24,714 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:24,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1330160311, now seen corresponding path program 1 times [2020-12-22 07:09:24,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:24,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246492521] [2020-12-22 07:09:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:24,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246492521] [2020-12-22 07:09:24,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:24,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:24,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267431435] [2020-12-22 07:09:24,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:24,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:24,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:24,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:24,765 INFO L87 Difference]: Start difference. First operand 10596 states and 14447 transitions. Second operand 4 states. [2020-12-22 07:09:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:27,219 INFO L93 Difference]: Finished difference Result 40013 states and 54564 transitions. [2020-12-22 07:09:27,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:27,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:09:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:27,277 INFO L225 Difference]: With dead ends: 40013 [2020-12-22 07:09:27,277 INFO L226 Difference]: Without dead ends: 29471 [2020-12-22 07:09:27,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:27,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29471 states. [2020-12-22 07:09:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29471 to 28393. [2020-12-22 07:09:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28393 states. [2020-12-22 07:09:29,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28393 states to 28393 states and 38440 transitions. [2020-12-22 07:09:29,554 INFO L78 Accepts]: Start accepts. Automaton has 28393 states and 38440 transitions. Word has length 127 [2020-12-22 07:09:29,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:29,554 INFO L481 AbstractCegarLoop]: Abstraction has 28393 states and 38440 transitions. [2020-12-22 07:09:29,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:29,554 INFO L276 IsEmpty]: Start isEmpty. Operand 28393 states and 38440 transitions. [2020-12-22 07:09:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:09:29,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:29,560 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:29,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:09:29,560 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:29,561 INFO L82 PathProgramCache]: Analyzing trace with hash -156894974, now seen corresponding path program 1 times [2020-12-22 07:09:29,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:29,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180957006] [2020-12-22 07:09:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:29,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180957006] [2020-12-22 07:09:29,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:29,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:29,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702319006] [2020-12-22 07:09:29,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:29,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:29,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:29,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:29,625 INFO L87 Difference]: Start difference. First operand 28393 states and 38440 transitions. Second operand 5 states. [2020-12-22 07:09:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:33,289 INFO L93 Difference]: Finished difference Result 72366 states and 98739 transitions. [2020-12-22 07:09:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:33,289 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2020-12-22 07:09:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:33,361 INFO L225 Difference]: With dead ends: 72366 [2020-12-22 07:09:33,361 INFO L226 Difference]: Without dead ends: 44031 [2020-12-22 07:09:33,393 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 07:09:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44031 states. [2020-12-22 07:09:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44031 to 28804. [2020-12-22 07:09:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28804 states. [2020-12-22 07:09:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28804 states to 28804 states and 38620 transitions. [2020-12-22 07:09:36,204 INFO L78 Accepts]: Start accepts. Automaton has 28804 states and 38620 transitions. Word has length 131 [2020-12-22 07:09:36,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:36,204 INFO L481 AbstractCegarLoop]: Abstraction has 28804 states and 38620 transitions. [2020-12-22 07:09:36,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 28804 states and 38620 transitions. [2020-12-22 07:09:36,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:09:36,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:36,208 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:36,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:09:36,208 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:36,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1577209476, now seen corresponding path program 1 times [2020-12-22 07:09:36,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:36,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317251790] [2020-12-22 07:09:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:36,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317251790] [2020-12-22 07:09:36,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:36,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:36,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142974860] [2020-12-22 07:09:36,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:36,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:36,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:36,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:36,263 INFO L87 Difference]: Start difference. First operand 28804 states and 38620 transitions. Second operand 3 states. [2020-12-22 07:09:40,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:40,356 INFO L93 Difference]: Finished difference Result 82794 states and 111133 transitions. [2020-12-22 07:09:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:40,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 07:09:40,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:40,414 INFO L225 Difference]: With dead ends: 82794 [2020-12-22 07:09:40,414 INFO L226 Difference]: Without dead ends: 54057 [2020-12-22 07:09:40,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54057 states. [2020-12-22 07:09:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54057 to 53947. [2020-12-22 07:09:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53947 states. [2020-12-22 07:09:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53947 states to 53947 states and 72117 transitions. [2020-12-22 07:09:45,055 INFO L78 Accepts]: Start accepts. Automaton has 53947 states and 72117 transitions. Word has length 131 [2020-12-22 07:09:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:45,055 INFO L481 AbstractCegarLoop]: Abstraction has 53947 states and 72117 transitions. [2020-12-22 07:09:45,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:45,056 INFO L276 IsEmpty]: Start isEmpty. Operand 53947 states and 72117 transitions. [2020-12-22 07:09:45,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:09:45,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:45,064 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:45,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:09:45,065 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:45,066 INFO L82 PathProgramCache]: Analyzing trace with hash -580263547, now seen corresponding path program 1 times [2020-12-22 07:09:45,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:45,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62414429] [2020-12-22 07:09:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:45,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62414429] [2020-12-22 07:09:45,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:45,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:45,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776698305] [2020-12-22 07:09:45,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:45,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:45,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:45,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:45,124 INFO L87 Difference]: Start difference. First operand 53947 states and 72117 transitions. Second operand 5 states. [2020-12-22 07:09:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:52,330 INFO L93 Difference]: Finished difference Result 145768 states and 196708 transitions. [2020-12-22 07:09:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:52,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2020-12-22 07:09:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:52,436 INFO L225 Difference]: With dead ends: 145768 [2020-12-22 07:09:52,436 INFO L226 Difference]: Without dead ends: 91892 [2020-12-22 07:09:52,477 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 07:09:52,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91892 states. [2020-12-22 07:09:57,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91892 to 55048. [2020-12-22 07:09:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55048 states. [2020-12-22 07:09:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55048 states to 55048 states and 72904 transitions. [2020-12-22 07:09:57,422 INFO L78 Accepts]: Start accepts. Automaton has 55048 states and 72904 transitions. Word has length 131 [2020-12-22 07:09:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:57,422 INFO L481 AbstractCegarLoop]: Abstraction has 55048 states and 72904 transitions. [2020-12-22 07:09:57,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 55048 states and 72904 transitions. [2020-12-22 07:09:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:09:57,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:57,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:57,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:09:57,428 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:57,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:57,428 INFO L82 PathProgramCache]: Analyzing trace with hash -997660153, now seen corresponding path program 1 times [2020-12-22 07:09:57,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:57,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836024655] [2020-12-22 07:09:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:57,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836024655] [2020-12-22 07:09:57,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:57,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:57,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786157117] [2020-12-22 07:09:57,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:57,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:57,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:57,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:57,487 INFO L87 Difference]: Start difference. First operand 55048 states and 72904 transitions. Second operand 5 states. [2020-12-22 07:10:07,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:07,887 INFO L93 Difference]: Finished difference Result 178285 states and 239345 transitions. [2020-12-22 07:10:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:10:07,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2020-12-22 07:10:07,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:08,036 INFO L225 Difference]: With dead ends: 178285 [2020-12-22 07:10:08,036 INFO L226 Difference]: Without dead ends: 123315 [2020-12-22 07:10:08,080 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 07:10:08,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123315 states. [2020-12-22 07:10:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123315 to 57091. [2020-12-22 07:10:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57091 states. [2020-12-22 07:10:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57091 states to 57091 states and 74947 transitions. [2020-12-22 07:10:14,187 INFO L78 Accepts]: Start accepts. Automaton has 57091 states and 74947 transitions. Word has length 131 [2020-12-22 07:10:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:14,187 INFO L481 AbstractCegarLoop]: Abstraction has 57091 states and 74947 transitions. [2020-12-22 07:10:14,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:10:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 57091 states and 74947 transitions. [2020-12-22 07:10:14,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:10:14,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:14,193 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:14,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:10:14,193 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:14,193 INFO L82 PathProgramCache]: Analyzing trace with hash 263257097, now seen corresponding path program 1 times [2020-12-22 07:10:14,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:14,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184985728] [2020-12-22 07:10:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:14,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184985728] [2020-12-22 07:10:14,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:14,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:14,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864847503] [2020-12-22 07:10:14,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:14,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:14,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:14,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:14,249 INFO L87 Difference]: Start difference. First operand 57091 states and 74947 transitions. Second operand 4 states. [2020-12-22 07:10:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:23,039 INFO L93 Difference]: Finished difference Result 148528 states and 193701 transitions. [2020-12-22 07:10:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:23,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 07:10:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:23,133 INFO L225 Difference]: With dead ends: 148528 [2020-12-22 07:10:23,133 INFO L226 Difference]: Without dead ends: 91520 [2020-12-22 07:10:23,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91520 states. [2020-12-22 07:10:29,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91520 to 65497. [2020-12-22 07:10:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65497 states. [2020-12-22 07:10:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65497 states to 65497 states and 84753 transitions. [2020-12-22 07:10:29,782 INFO L78 Accepts]: Start accepts. Automaton has 65497 states and 84753 transitions. Word has length 131 [2020-12-22 07:10:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:29,782 INFO L481 AbstractCegarLoop]: Abstraction has 65497 states and 84753 transitions. [2020-12-22 07:10:29,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 65497 states and 84753 transitions. [2020-12-22 07:10:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:10:29,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:29,788 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:29,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:10:29,789 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:29,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1650042507, now seen corresponding path program 1 times [2020-12-22 07:10:29,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:29,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599988446] [2020-12-22 07:10:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:29,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599988446] [2020-12-22 07:10:29,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:29,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:29,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187263098] [2020-12-22 07:10:29,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:29,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:29,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:29,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:29,856 INFO L87 Difference]: Start difference. First operand 65497 states and 84753 transitions. Second operand 4 states. [2020-12-22 07:10:39,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:39,320 INFO L93 Difference]: Finished difference Result 161016 states and 208074 transitions. [2020-12-22 07:10:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:39,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 07:10:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:39,429 INFO L225 Difference]: With dead ends: 161016 [2020-12-22 07:10:39,429 INFO L226 Difference]: Without dead ends: 95674 [2020-12-22 07:10:39,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95674 states. [2020-12-22 07:10:46,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95674 to 65497. [2020-12-22 07:10:46,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65497 states. [2020-12-22 07:10:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65497 states to 65497 states and 84536 transitions. [2020-12-22 07:10:46,123 INFO L78 Accepts]: Start accepts. Automaton has 65497 states and 84536 transitions. Word has length 131 [2020-12-22 07:10:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:46,123 INFO L481 AbstractCegarLoop]: Abstraction has 65497 states and 84536 transitions. [2020-12-22 07:10:46,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 65497 states and 84536 transitions. [2020-12-22 07:10:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:10:46,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:46,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:46,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:10:46,129 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:46,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2093943181, now seen corresponding path program 1 times [2020-12-22 07:10:46,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:46,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325925016] [2020-12-22 07:10:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:46,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325925016] [2020-12-22 07:10:46,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:46,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:46,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394902840] [2020-12-22 07:10:46,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:46,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:46,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:46,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:46,187 INFO L87 Difference]: Start difference. First operand 65497 states and 84536 transitions. Second operand 4 states. [2020-12-22 07:10:55,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:55,999 INFO L93 Difference]: Finished difference Result 161013 states and 207583 transitions. [2020-12-22 07:10:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:55,999 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 07:10:55,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:56,258 INFO L225 Difference]: With dead ends: 161013 [2020-12-22 07:10:56,259 INFO L226 Difference]: Without dead ends: 95674 [2020-12-22 07:10:56,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95674 states. [2020-12-22 07:11:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95674 to 65497. [2020-12-22 07:11:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65497 states. [2020-12-22 07:11:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65497 states to 65497 states and 84319 transitions. [2020-12-22 07:11:03,192 INFO L78 Accepts]: Start accepts. Automaton has 65497 states and 84319 transitions. Word has length 131 [2020-12-22 07:11:03,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:03,192 INFO L481 AbstractCegarLoop]: Abstraction has 65497 states and 84319 transitions. [2020-12-22 07:11:03,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 65497 states and 84319 transitions. [2020-12-22 07:11:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:11:03,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:03,196 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:03,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:11:03,196 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:03,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:03,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1612862923, now seen corresponding path program 1 times [2020-12-22 07:11:03,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:03,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068035082] [2020-12-22 07:11:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:11:03,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068035082] [2020-12-22 07:11:03,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:03,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:03,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22706018] [2020-12-22 07:11:03,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:03,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:03,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:03,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:03,252 INFO L87 Difference]: Start difference. First operand 65497 states and 84319 transitions. Second operand 4 states.