/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.12.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:10:49,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:10:49,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:10:49,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:10:49,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:10:49,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:10:49,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:10:49,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:10:49,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:10:49,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:10:49,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:10:49,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:10:49,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:10:49,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:10:49,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:10:49,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:10:49,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:10:49,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:10:50,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:10:50,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:10:50,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:10:50,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:10:50,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:10:50,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:10:50,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:10:50,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:10:50,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:10:50,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:10:50,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:10:50,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:10:50,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:10:50,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:10:50,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:10:50,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:10:50,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:10:50,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:10:50,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:10:50,104 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:10:50,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:10:50,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:10:50,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:10:50,106 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:10:50,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:10:50,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:10:50,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:10:50,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:10:50,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:10:50,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:10:50,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:10:50,110 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:10:50,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:10:50,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:10:50,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:10:50,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:10:50,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:10:50,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:10:50,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:10:50,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:10:50,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:10:50,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:10:50,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:10:50,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:10:50,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:10:50,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:10:50,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:10:50,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:10:50,571 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:10:50,572 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:10:50,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.12.cil-1.c [2020-12-22 07:10:50,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a9d63733/0cb8830aad6647008ec126525632a413/FLAGea1c6451f [2020-12-22 07:10:51,316 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:10:51,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.12.cil-1.c [2020-12-22 07:10:51,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a9d63733/0cb8830aad6647008ec126525632a413/FLAGea1c6451f [2020-12-22 07:10:51,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a9d63733/0cb8830aad6647008ec126525632a413 [2020-12-22 07:10:51,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:10:51,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:10:51,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:51,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:10:51,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:10:51,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:51" (1/1) ... [2020-12-22 07:10:51,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500de11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:51, skipping insertion in model container [2020-12-22 07:10:51,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:51" (1/1) ... [2020-12-22 07:10:51,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:10:51,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:10:51,905 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.12.cil-1.c[366,379] [2020-12-22 07:10:52,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:52,117 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:10:52,132 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.12.cil-1.c[366,379] [2020-12-22 07:10:52,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:52,268 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:10:52,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:52 WrapperNode [2020-12-22 07:10:52,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:52,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:52,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:10:52,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:10:52,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:52" (1/1) ... [2020-12-22 07:10:52,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:52" (1/1) ... [2020-12-22 07:10:52,485 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:52,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:10:52,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:10:52,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:10:52,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:52" (1/1) ... [2020-12-22 07:10:52,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:52" (1/1) ... [2020-12-22 07:10:52,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:52" (1/1) ... [2020-12-22 07:10:52,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:52" (1/1) ... [2020-12-22 07:10:52,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:52" (1/1) ... [2020-12-22 07:10:52,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:52" (1/1) ... [2020-12-22 07:10:52,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:52" (1/1) ... [2020-12-22 07:10:52,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:10:52,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:10:52,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:10:52,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:10:52,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:52" (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 07:10:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:10:52,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:10:52,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:10:52,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:10:55,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:10:55,694 INFO L299 CfgBuilder]: Removed 555 assume(true) statements. [2020-12-22 07:10:55,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:55 BoogieIcfgContainer [2020-12-22 07:10:55,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:10:55,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:10:55,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:10:55,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:10:55,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:10:51" (1/3) ... [2020-12-22 07:10:55,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736c10d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:55, skipping insertion in model container [2020-12-22 07:10:55,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:52" (2/3) ... [2020-12-22 07:10:55,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736c10d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:55, skipping insertion in model container [2020-12-22 07:10:55,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:55" (3/3) ... [2020-12-22 07:10:55,719 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.12.cil-1.c [2020-12-22 07:10:55,726 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:10:55,732 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 07:10:55,753 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 07:10:55,815 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:10:55,815 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:10:55,815 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:10:55,816 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:10:55,816 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:10:55,816 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:10:55,816 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:10:55,817 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:10:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states. [2020-12-22 07:10:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:10:55,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:55,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:55,907 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:55,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:55,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1063150512, now seen corresponding path program 1 times [2020-12-22 07:10:55,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:55,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443593376] [2020-12-22 07:10:55,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:56,388 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 07:10:56,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443593376] [2020-12-22 07:10:56,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:56,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:56,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863489573] [2020-12-22 07:10:56,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:56,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:56,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:56,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:56,416 INFO L87 Difference]: Start difference. First operand 1765 states. Second operand 3 states. [2020-12-22 07:10:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:56,586 INFO L93 Difference]: Finished difference Result 3525 states and 5317 transitions. [2020-12-22 07:10:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:56,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:10:56,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:56,646 INFO L225 Difference]: With dead ends: 3525 [2020-12-22 07:10:56,646 INFO L226 Difference]: Without dead ends: 1761 [2020-12-22 07:10:56,690 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 07:10:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2020-12-22 07:10:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1761. [2020-12-22 07:10:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-12-22 07:10:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2625 transitions. [2020-12-22 07:10:56,866 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2625 transitions. Word has length 160 [2020-12-22 07:10:56,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:56,866 INFO L481 AbstractCegarLoop]: Abstraction has 1761 states and 2625 transitions. [2020-12-22 07:10:56,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:56,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2625 transitions. [2020-12-22 07:10:56,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:10:56,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:56,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:56,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:10:56,880 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash 82195698, now seen corresponding path program 1 times [2020-12-22 07:10:56,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:56,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398730998] [2020-12-22 07:10:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:56,997 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 07:10:56,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398730998] [2020-12-22 07:10:56,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:56,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:56,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551514232] [2020-12-22 07:10:57,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:57,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:57,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:57,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:57,001 INFO L87 Difference]: Start difference. First operand 1761 states and 2625 transitions. Second operand 3 states. [2020-12-22 07:10:57,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:57,076 INFO L93 Difference]: Finished difference Result 3509 states and 5228 transitions. [2020-12-22 07:10:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:57,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:10:57,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:57,086 INFO L225 Difference]: With dead ends: 3509 [2020-12-22 07:10:57,086 INFO L226 Difference]: Without dead ends: 1761 [2020-12-22 07:10:57,091 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 07:10:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2020-12-22 07:10:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1761. [2020-12-22 07:10:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-12-22 07:10:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2624 transitions. [2020-12-22 07:10:57,156 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2624 transitions. Word has length 160 [2020-12-22 07:10:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:57,156 INFO L481 AbstractCegarLoop]: Abstraction has 1761 states and 2624 transitions. [2020-12-22 07:10:57,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2624 transitions. [2020-12-22 07:10:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:10:57,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:57,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:57,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:10:57,159 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:57,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:57,160 INFO L82 PathProgramCache]: Analyzing trace with hash 346843188, now seen corresponding path program 1 times [2020-12-22 07:10:57,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:57,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944114473] [2020-12-22 07:10:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:57,289 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 07:10:57,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944114473] [2020-12-22 07:10:57,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:57,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:57,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713868777] [2020-12-22 07:10:57,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:57,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:57,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:57,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:57,297 INFO L87 Difference]: Start difference. First operand 1761 states and 2624 transitions. Second operand 3 states. [2020-12-22 07:10:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:57,503 INFO L93 Difference]: Finished difference Result 5015 states and 7450 transitions. [2020-12-22 07:10:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:57,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:10:57,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:57,522 INFO L225 Difference]: With dead ends: 5015 [2020-12-22 07:10:57,522 INFO L226 Difference]: Without dead ends: 3271 [2020-12-22 07:10:57,529 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 07:10:57,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-12-22 07:10:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3267. [2020-12-22 07:10:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:10:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4849 transitions. [2020-12-22 07:10:57,664 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4849 transitions. Word has length 160 [2020-12-22 07:10:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:57,672 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4849 transitions. [2020-12-22 07:10:57,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4849 transitions. [2020-12-22 07:10:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:10:57,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:57,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:57,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:10:57,675 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:57,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:57,676 INFO L82 PathProgramCache]: Analyzing trace with hash -686676560, now seen corresponding path program 1 times [2020-12-22 07:10:57,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:57,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479195078] [2020-12-22 07:10:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:57,839 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 07:10:57,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479195078] [2020-12-22 07:10:57,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:57,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:57,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326325658] [2020-12-22 07:10:57,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:57,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:57,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:57,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:57,843 INFO L87 Difference]: Start difference. First operand 3267 states and 4849 transitions. Second operand 4 states. [2020-12-22 07:10:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:58,289 INFO L93 Difference]: Finished difference Result 8025 states and 11895 transitions. [2020-12-22 07:10:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:58,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:10:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:58,321 INFO L225 Difference]: With dead ends: 8025 [2020-12-22 07:10:58,322 INFO L226 Difference]: Without dead ends: 4776 [2020-12-22 07:10:58,329 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 07:10:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4776 states. [2020-12-22 07:10:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4776 to 3267. [2020-12-22 07:10:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:10:58,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4846 transitions. [2020-12-22 07:10:58,569 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4846 transitions. Word has length 160 [2020-12-22 07:10:58,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:58,570 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4846 transitions. [2020-12-22 07:10:58,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4846 transitions. [2020-12-22 07:10:58,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:10:58,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:58,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:58,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:10:58,575 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:58,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:58,576 INFO L82 PathProgramCache]: Analyzing trace with hash -260122062, now seen corresponding path program 1 times [2020-12-22 07:10:58,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:58,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906521488] [2020-12-22 07:10:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:58,693 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 07:10:58,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906521488] [2020-12-22 07:10:58,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:58,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:58,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883132388] [2020-12-22 07:10:58,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:58,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:58,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:58,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:58,698 INFO L87 Difference]: Start difference. First operand 3267 states and 4846 transitions. Second operand 4 states. [2020-12-22 07:10:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:59,091 INFO L93 Difference]: Finished difference Result 8023 states and 11885 transitions. [2020-12-22 07:10:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:59,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:10:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:59,119 INFO L225 Difference]: With dead ends: 8023 [2020-12-22 07:10:59,119 INFO L226 Difference]: Without dead ends: 4775 [2020-12-22 07:10:59,126 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 07:10:59,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4775 states. [2020-12-22 07:10:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4775 to 3267. [2020-12-22 07:10:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:10:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4843 transitions. [2020-12-22 07:10:59,334 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4843 transitions. Word has length 160 [2020-12-22 07:10:59,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:59,335 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4843 transitions. [2020-12-22 07:10:59,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4843 transitions. [2020-12-22 07:10:59,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:10:59,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:59,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:59,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:10:59,338 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:59,339 INFO L82 PathProgramCache]: Analyzing trace with hash -800551568, now seen corresponding path program 1 times [2020-12-22 07:10:59,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:59,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121549642] [2020-12-22 07:10:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:59,445 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 07:10:59,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121549642] [2020-12-22 07:10:59,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:59,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:59,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565836118] [2020-12-22 07:10:59,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:59,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:59,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:59,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:59,449 INFO L87 Difference]: Start difference. First operand 3267 states and 4843 transitions. Second operand 4 states. [2020-12-22 07:10:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:59,823 INFO L93 Difference]: Finished difference Result 8021 states and 11875 transitions. [2020-12-22 07:10:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:59,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:10:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:59,850 INFO L225 Difference]: With dead ends: 8021 [2020-12-22 07:10:59,851 INFO L226 Difference]: Without dead ends: 4774 [2020-12-22 07:10:59,859 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 07:10:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2020-12-22 07:11:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 3267. [2020-12-22 07:11:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:00,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4840 transitions. [2020-12-22 07:11:00,092 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4840 transitions. Word has length 160 [2020-12-22 07:11:00,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:00,093 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4840 transitions. [2020-12-22 07:11:00,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:00,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4840 transitions. [2020-12-22 07:11:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:00,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:00,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:00,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:11:00,096 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:00,101 INFO L82 PathProgramCache]: Analyzing trace with hash -956532110, now seen corresponding path program 1 times [2020-12-22 07:11:00,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:00,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488577887] [2020-12-22 07:11:00,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:00,175 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 07:11:00,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488577887] [2020-12-22 07:11:00,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:00,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:00,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033109509] [2020-12-22 07:11:00,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:00,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:00,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:00,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:00,178 INFO L87 Difference]: Start difference. First operand 3267 states and 4840 transitions. Second operand 3 states. [2020-12-22 07:11:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:00,384 INFO L93 Difference]: Finished difference Result 6512 states and 9645 transitions. [2020-12-22 07:11:00,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:00,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:11:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:00,416 INFO L225 Difference]: With dead ends: 6512 [2020-12-22 07:11:00,417 INFO L226 Difference]: Without dead ends: 3267 [2020-12-22 07:11:00,426 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 07:11:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2020-12-22 07:11:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 3267. [2020-12-22 07:11:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4832 transitions. [2020-12-22 07:11:00,683 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4832 transitions. Word has length 160 [2020-12-22 07:11:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:00,683 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4832 transitions. [2020-12-22 07:11:00,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4832 transitions. [2020-12-22 07:11:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:00,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:00,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:00,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:11:00,686 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:00,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:00,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1550565364, now seen corresponding path program 1 times [2020-12-22 07:11:00,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:00,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934130451] [2020-12-22 07:11:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:00,767 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 07:11:00,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934130451] [2020-12-22 07:11:00,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:00,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:00,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097122869] [2020-12-22 07:11:00,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:00,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:00,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:00,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:00,770 INFO L87 Difference]: Start difference. First operand 3267 states and 4832 transitions. Second operand 4 states. [2020-12-22 07:11:01,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:01,119 INFO L93 Difference]: Finished difference Result 8015 states and 11840 transitions. [2020-12-22 07:11:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:01,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:01,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:01,145 INFO L225 Difference]: With dead ends: 8015 [2020-12-22 07:11:01,145 INFO L226 Difference]: Without dead ends: 4771 [2020-12-22 07:11:01,153 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 07:11:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2020-12-22 07:11:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 3267. [2020-12-22 07:11:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4829 transitions. [2020-12-22 07:11:01,396 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4829 transitions. Word has length 160 [2020-12-22 07:11:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:01,397 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4829 transitions. [2020-12-22 07:11:01,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4829 transitions. [2020-12-22 07:11:01,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:01,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:01,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:01,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:11:01,402 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:01,403 INFO L82 PathProgramCache]: Analyzing trace with hash -585317838, now seen corresponding path program 1 times [2020-12-22 07:11:01,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:01,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903825135] [2020-12-22 07:11:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:01,483 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 07:11:01,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903825135] [2020-12-22 07:11:01,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:01,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:01,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611593968] [2020-12-22 07:11:01,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:01,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:01,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:01,492 INFO L87 Difference]: Start difference. First operand 3267 states and 4829 transitions. Second operand 4 states. [2020-12-22 07:11:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:01,849 INFO L93 Difference]: Finished difference Result 8013 states and 11830 transitions. [2020-12-22 07:11:01,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:01,849 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:01,864 INFO L225 Difference]: With dead ends: 8013 [2020-12-22 07:11:01,864 INFO L226 Difference]: Without dead ends: 4770 [2020-12-22 07:11:01,871 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 07:11:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2020-12-22 07:11:02,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 3267. [2020-12-22 07:11:02,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4826 transitions. [2020-12-22 07:11:02,136 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4826 transitions. Word has length 160 [2020-12-22 07:11:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:02,137 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4826 transitions. [2020-12-22 07:11:02,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4826 transitions. [2020-12-22 07:11:02,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:02,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:02,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:02,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:11:02,140 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:02,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash -515669964, now seen corresponding path program 1 times [2020-12-22 07:11:02,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:02,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085956336] [2020-12-22 07:11:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:02,226 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 07:11:02,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085956336] [2020-12-22 07:11:02,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:02,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:02,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583081117] [2020-12-22 07:11:02,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:02,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:02,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:02,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:02,229 INFO L87 Difference]: Start difference. First operand 3267 states and 4826 transitions. Second operand 4 states. [2020-12-22 07:11:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:02,666 INFO L93 Difference]: Finished difference Result 8011 states and 11820 transitions. [2020-12-22 07:11:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:02,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:02,681 INFO L225 Difference]: With dead ends: 8011 [2020-12-22 07:11:02,681 INFO L226 Difference]: Without dead ends: 4769 [2020-12-22 07:11:02,689 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 07:11:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2020-12-22 07:11:02,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 3267. [2020-12-22 07:11:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4823 transitions. [2020-12-22 07:11:02,889 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4823 transitions. Word has length 160 [2020-12-22 07:11:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:02,890 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4823 transitions. [2020-12-22 07:11:02,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4823 transitions. [2020-12-22 07:11:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:02,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:02,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:02,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:11:02,893 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:02,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:02,893 INFO L82 PathProgramCache]: Analyzing trace with hash -97781262, now seen corresponding path program 1 times [2020-12-22 07:11:02,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:02,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171610820] [2020-12-22 07:11:02,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:02,964 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 07:11:02,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171610820] [2020-12-22 07:11:02,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:02,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:02,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964572994] [2020-12-22 07:11:02,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:02,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:02,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:02,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:02,968 INFO L87 Difference]: Start difference. First operand 3267 states and 4823 transitions. Second operand 4 states. [2020-12-22 07:11:03,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:03,348 INFO L93 Difference]: Finished difference Result 8009 states and 11810 transitions. [2020-12-22 07:11:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:03,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:03,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:03,360 INFO L225 Difference]: With dead ends: 8009 [2020-12-22 07:11:03,360 INFO L226 Difference]: Without dead ends: 4768 [2020-12-22 07:11:03,367 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 07:11:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2020-12-22 07:11:03,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 3267. [2020-12-22 07:11:03,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4820 transitions. [2020-12-22 07:11:03,562 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4820 transitions. Word has length 160 [2020-12-22 07:11:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:03,563 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4820 transitions. [2020-12-22 07:11:03,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:03,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4820 transitions. [2020-12-22 07:11:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:03,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:03,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:03,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:11:03,565 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:03,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:03,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1301172340, now seen corresponding path program 1 times [2020-12-22 07:11:03,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:03,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957424530] [2020-12-22 07:11:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:03,625 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 07:11:03,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957424530] [2020-12-22 07:11:03,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:03,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:03,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181816891] [2020-12-22 07:11:03,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:03,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:03,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:03,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:03,627 INFO L87 Difference]: Start difference. First operand 3267 states and 4820 transitions. Second operand 3 states. [2020-12-22 07:11:03,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:03,821 INFO L93 Difference]: Finished difference Result 6507 states and 9600 transitions. [2020-12-22 07:11:03,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:03,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:11:03,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:03,829 INFO L225 Difference]: With dead ends: 6507 [2020-12-22 07:11:03,829 INFO L226 Difference]: Without dead ends: 3267 [2020-12-22 07:11:03,836 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 07:11:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2020-12-22 07:11:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 3267. [2020-12-22 07:11:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4812 transitions. [2020-12-22 07:11:04,067 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4812 transitions. Word has length 160 [2020-12-22 07:11:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:04,067 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4812 transitions. [2020-12-22 07:11:04,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:04,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4812 transitions. [2020-12-22 07:11:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:04,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:04,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:04,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:11:04,070 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:04,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:04,071 INFO L82 PathProgramCache]: Analyzing trace with hash -293635856, now seen corresponding path program 1 times [2020-12-22 07:11:04,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:04,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048524111] [2020-12-22 07:11:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:04,157 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 07:11:04,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048524111] [2020-12-22 07:11:04,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:04,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:04,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054893746] [2020-12-22 07:11:04,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:04,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:04,160 INFO L87 Difference]: Start difference. First operand 3267 states and 4812 transitions. Second operand 4 states. [2020-12-22 07:11:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:04,534 INFO L93 Difference]: Finished difference Result 8005 states and 11779 transitions. [2020-12-22 07:11:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:04,535 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:04,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:04,546 INFO L225 Difference]: With dead ends: 8005 [2020-12-22 07:11:04,546 INFO L226 Difference]: Without dead ends: 4766 [2020-12-22 07:11:04,558 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 07:11:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4766 states. [2020-12-22 07:11:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4766 to 3267. [2020-12-22 07:11:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4809 transitions. [2020-12-22 07:11:04,844 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4809 transitions. Word has length 160 [2020-12-22 07:11:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:04,846 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4809 transitions. [2020-12-22 07:11:04,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4809 transitions. [2020-12-22 07:11:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:04,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:04,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:04,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:11:04,849 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:04,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:04,850 INFO L82 PathProgramCache]: Analyzing trace with hash 69830642, now seen corresponding path program 1 times [2020-12-22 07:11:04,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:04,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261692204] [2020-12-22 07:11:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:04,918 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 07:11:04,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261692204] [2020-12-22 07:11:04,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:04,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:04,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096216110] [2020-12-22 07:11:04,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:04,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:04,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:04,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:04,921 INFO L87 Difference]: Start difference. First operand 3267 states and 4809 transitions. Second operand 4 states. [2020-12-22 07:11:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:05,399 INFO L93 Difference]: Finished difference Result 7910 states and 11635 transitions. [2020-12-22 07:11:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:05,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:05,416 INFO L225 Difference]: With dead ends: 7910 [2020-12-22 07:11:05,416 INFO L226 Difference]: Without dead ends: 4673 [2020-12-22 07:11:05,425 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 07:11:05,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2020-12-22 07:11:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 3267. [2020-12-22 07:11:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:05,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4806 transitions. [2020-12-22 07:11:05,695 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4806 transitions. Word has length 160 [2020-12-22 07:11:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:05,696 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4806 transitions. [2020-12-22 07:11:05,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:05,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4806 transitions. [2020-12-22 07:11:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:05,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:05,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:05,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:11:05,699 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:05,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:05,700 INFO L82 PathProgramCache]: Analyzing trace with hash -475041932, now seen corresponding path program 1 times [2020-12-22 07:11:05,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:05,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554506902] [2020-12-22 07:11:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:05,809 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 07:11:05,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554506902] [2020-12-22 07:11:05,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:05,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:05,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115322831] [2020-12-22 07:11:05,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:05,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:05,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:05,812 INFO L87 Difference]: Start difference. First operand 3267 states and 4806 transitions. Second operand 4 states. [2020-12-22 07:11:06,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:06,390 INFO L93 Difference]: Finished difference Result 7908 states and 11625 transitions. [2020-12-22 07:11:06,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:06,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:06,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:06,403 INFO L225 Difference]: With dead ends: 7908 [2020-12-22 07:11:06,404 INFO L226 Difference]: Without dead ends: 4672 [2020-12-22 07:11:06,411 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 07:11:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2020-12-22 07:11:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 3267. [2020-12-22 07:11:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4803 transitions. [2020-12-22 07:11:06,648 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4803 transitions. Word has length 160 [2020-12-22 07:11:06,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:06,649 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4803 transitions. [2020-12-22 07:11:06,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:06,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4803 transitions. [2020-12-22 07:11:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:06,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:06,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:06,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:11:06,652 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:06,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:06,652 INFO L82 PathProgramCache]: Analyzing trace with hash 200118194, now seen corresponding path program 1 times [2020-12-22 07:11:06,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:06,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969462033] [2020-12-22 07:11:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:06,711 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 07:11:06,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969462033] [2020-12-22 07:11:06,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:06,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:06,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487994382] [2020-12-22 07:11:06,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:06,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:06,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:06,714 INFO L87 Difference]: Start difference. First operand 3267 states and 4803 transitions. Second operand 3 states. [2020-12-22 07:11:07,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:07,016 INFO L93 Difference]: Finished difference Result 6502 states and 9560 transitions. [2020-12-22 07:11:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:07,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:11:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:07,023 INFO L225 Difference]: With dead ends: 6502 [2020-12-22 07:11:07,023 INFO L226 Difference]: Without dead ends: 3267 [2020-12-22 07:11:07,028 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 07:11:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2020-12-22 07:11:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 3267. [2020-12-22 07:11:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4767 transitions. [2020-12-22 07:11:07,238 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4767 transitions. Word has length 160 [2020-12-22 07:11:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:07,239 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4767 transitions. [2020-12-22 07:11:07,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4767 transitions. [2020-12-22 07:11:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:07,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:07,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:07,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:11:07,243 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:07,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:07,244 INFO L82 PathProgramCache]: Analyzing trace with hash -319925257, now seen corresponding path program 1 times [2020-12-22 07:11:07,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:07,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257253275] [2020-12-22 07:11:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:07,302 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 07:11:07,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257253275] [2020-12-22 07:11:07,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:07,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:07,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788727904] [2020-12-22 07:11:07,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:07,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:07,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:07,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:07,304 INFO L87 Difference]: Start difference. First operand 3267 states and 4767 transitions. Second operand 4 states. [2020-12-22 07:11:07,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:07,794 INFO L93 Difference]: Finished difference Result 7904 states and 11526 transitions. [2020-12-22 07:11:07,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:07,795 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:07,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:07,807 INFO L225 Difference]: With dead ends: 7904 [2020-12-22 07:11:07,807 INFO L226 Difference]: Without dead ends: 4670 [2020-12-22 07:11:07,813 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 07:11:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4670 states. [2020-12-22 07:11:08,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4670 to 3267. [2020-12-22 07:11:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4764 transitions. [2020-12-22 07:11:08,056 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4764 transitions. Word has length 160 [2020-12-22 07:11:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:08,057 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4764 transitions. [2020-12-22 07:11:08,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:08,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4764 transitions. [2020-12-22 07:11:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:08,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:08,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:08,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:11:08,059 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:08,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:08,060 INFO L82 PathProgramCache]: Analyzing trace with hash -904696907, now seen corresponding path program 1 times [2020-12-22 07:11:08,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:08,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613168727] [2020-12-22 07:11:08,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:08,154 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 07:11:08,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613168727] [2020-12-22 07:11:08,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:08,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:08,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924385592] [2020-12-22 07:11:08,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:08,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:08,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:08,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:08,157 INFO L87 Difference]: Start difference. First operand 3267 states and 4764 transitions. Second operand 4 states. [2020-12-22 07:11:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:08,658 INFO L93 Difference]: Finished difference Result 7902 states and 11516 transitions. [2020-12-22 07:11:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:08,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:08,673 INFO L225 Difference]: With dead ends: 7902 [2020-12-22 07:11:08,673 INFO L226 Difference]: Without dead ends: 4669 [2020-12-22 07:11:08,680 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 07:11:08,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4669 states. [2020-12-22 07:11:08,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4669 to 3267. [2020-12-22 07:11:08,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4761 transitions. [2020-12-22 07:11:08,923 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4761 transitions. Word has length 160 [2020-12-22 07:11:08,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:08,923 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4761 transitions. [2020-12-22 07:11:08,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4761 transitions. [2020-12-22 07:11:08,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:08,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:08,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:08,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:11:08,926 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:08,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1339202505, now seen corresponding path program 1 times [2020-12-22 07:11:08,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:08,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512670542] [2020-12-22 07:11:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:08,985 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 07:11:08,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512670542] [2020-12-22 07:11:08,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:08,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:08,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393799125] [2020-12-22 07:11:08,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:08,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:08,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:08,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:08,987 INFO L87 Difference]: Start difference. First operand 3267 states and 4761 transitions. Second operand 4 states. [2020-12-22 07:11:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:09,481 INFO L93 Difference]: Finished difference Result 7900 states and 11506 transitions. [2020-12-22 07:11:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:09,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:09,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:09,491 INFO L225 Difference]: With dead ends: 7900 [2020-12-22 07:11:09,491 INFO L226 Difference]: Without dead ends: 4668 [2020-12-22 07:11:09,497 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 07:11:09,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2020-12-22 07:11:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 3267. [2020-12-22 07:11:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4758 transitions. [2020-12-22 07:11:09,755 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4758 transitions. Word has length 160 [2020-12-22 07:11:09,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:09,756 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4758 transitions. [2020-12-22 07:11:09,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:09,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4758 transitions. [2020-12-22 07:11:09,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:09,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:09,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:09,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:11:09,758 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:09,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:09,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1768860811, now seen corresponding path program 1 times [2020-12-22 07:11:09,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:09,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446260447] [2020-12-22 07:11:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:09,847 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 07:11:09,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446260447] [2020-12-22 07:11:09,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:09,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:09,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281577679] [2020-12-22 07:11:09,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:09,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:09,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:09,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:09,850 INFO L87 Difference]: Start difference. First operand 3267 states and 4758 transitions. Second operand 4 states. [2020-12-22 07:11:10,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:10,324 INFO L93 Difference]: Finished difference Result 7898 states and 11496 transitions. [2020-12-22 07:11:10,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:10,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:10,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:10,335 INFO L225 Difference]: With dead ends: 7898 [2020-12-22 07:11:10,335 INFO L226 Difference]: Without dead ends: 4667 [2020-12-22 07:11:10,342 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 07:11:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2020-12-22 07:11:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 3267. [2020-12-22 07:11:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4755 transitions. [2020-12-22 07:11:10,710 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4755 transitions. Word has length 160 [2020-12-22 07:11:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:10,711 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4755 transitions. [2020-12-22 07:11:10,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4755 transitions. [2020-12-22 07:11:10,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:10,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:10,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:10,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:11:10,714 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:10,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:10,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1819509879, now seen corresponding path program 1 times [2020-12-22 07:11:10,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:10,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505173223] [2020-12-22 07:11:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:10,792 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 07:11:10,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505173223] [2020-12-22 07:11:10,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:10,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:10,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46280841] [2020-12-22 07:11:10,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:10,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:10,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:10,795 INFO L87 Difference]: Start difference. First operand 3267 states and 4755 transitions. Second operand 4 states. [2020-12-22 07:11:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:11,293 INFO L93 Difference]: Finished difference Result 7894 states and 11482 transitions. [2020-12-22 07:11:11,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:11,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:11,303 INFO L225 Difference]: With dead ends: 7894 [2020-12-22 07:11:11,304 INFO L226 Difference]: Without dead ends: 4665 [2020-12-22 07:11:11,310 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 07:11:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4665 states. [2020-12-22 07:11:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4665 to 3267. [2020-12-22 07:11:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:11,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4752 transitions. [2020-12-22 07:11:11,609 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4752 transitions. Word has length 160 [2020-12-22 07:11:11,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:11,609 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4752 transitions. [2020-12-22 07:11:11,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:11,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4752 transitions. [2020-12-22 07:11:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:11,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:11,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:11,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:11:11,612 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:11,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1613623815, now seen corresponding path program 1 times [2020-12-22 07:11:11,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:11,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126191283] [2020-12-22 07:11:11,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:11,714 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 07:11:11,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126191283] [2020-12-22 07:11:11,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:11,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:11,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377710990] [2020-12-22 07:11:11,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:11,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:11,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:11,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:11,720 INFO L87 Difference]: Start difference. First operand 3267 states and 4752 transitions. Second operand 4 states. [2020-12-22 07:11:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:12,291 INFO L93 Difference]: Finished difference Result 7892 states and 11472 transitions. [2020-12-22 07:11:12,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:12,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:12,300 INFO L225 Difference]: With dead ends: 7892 [2020-12-22 07:11:12,300 INFO L226 Difference]: Without dead ends: 4664 [2020-12-22 07:11:12,308 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 07:11:12,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4664 states. [2020-12-22 07:11:12,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4664 to 3267. [2020-12-22 07:11:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4749 transitions. [2020-12-22 07:11:12,600 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4749 transitions. Word has length 160 [2020-12-22 07:11:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:12,600 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4749 transitions. [2020-12-22 07:11:12,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4749 transitions. [2020-12-22 07:11:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:12,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:12,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:12,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:11:12,603 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:12,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:12,605 INFO L82 PathProgramCache]: Analyzing trace with hash 630934583, now seen corresponding path program 1 times [2020-12-22 07:11:12,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:12,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028451183] [2020-12-22 07:11:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:12,693 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 07:11:12,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028451183] [2020-12-22 07:11:12,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:12,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:12,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199147873] [2020-12-22 07:11:12,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:12,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:12,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:12,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:12,698 INFO L87 Difference]: Start difference. First operand 3267 states and 4749 transitions. Second operand 4 states. [2020-12-22 07:11:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:13,178 INFO L93 Difference]: Finished difference Result 7890 states and 11462 transitions. [2020-12-22 07:11:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:13,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:13,184 INFO L225 Difference]: With dead ends: 7890 [2020-12-22 07:11:13,184 INFO L226 Difference]: Without dead ends: 4663 [2020-12-22 07:11:13,188 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 07:11:13,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4663 states. [2020-12-22 07:11:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4663 to 3267. [2020-12-22 07:11:13,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:13,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4746 transitions. [2020-12-22 07:11:13,446 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4746 transitions. Word has length 160 [2020-12-22 07:11:13,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:13,446 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4746 transitions. [2020-12-22 07:11:13,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:13,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4746 transitions. [2020-12-22 07:11:13,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:13,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:13,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:13,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:11:13,448 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1118981689, now seen corresponding path program 1 times [2020-12-22 07:11:13,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:13,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346462480] [2020-12-22 07:11:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:13,506 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 07:11:13,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346462480] [2020-12-22 07:11:13,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:13,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:13,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336190731] [2020-12-22 07:11:13,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:13,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:13,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:13,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:13,508 INFO L87 Difference]: Start difference. First operand 3267 states and 4746 transitions. Second operand 4 states. [2020-12-22 07:11:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:13,997 INFO L93 Difference]: Finished difference Result 7888 states and 11452 transitions. [2020-12-22 07:11:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:13,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:14,002 INFO L225 Difference]: With dead ends: 7888 [2020-12-22 07:11:14,002 INFO L226 Difference]: Without dead ends: 4662 [2020-12-22 07:11:14,006 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 07:11:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2020-12-22 07:11:14,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 3267. [2020-12-22 07:11:14,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4743 transitions. [2020-12-22 07:11:14,256 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4743 transitions. Word has length 160 [2020-12-22 07:11:14,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:14,256 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4743 transitions. [2020-12-22 07:11:14,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:14,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4743 transitions. [2020-12-22 07:11:14,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:14,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:14,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:14,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:11:14,257 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:14,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:14,257 INFO L82 PathProgramCache]: Analyzing trace with hash 26346487, now seen corresponding path program 1 times [2020-12-22 07:11:14,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:14,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503554350] [2020-12-22 07:11:14,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:14,313 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 07:11:14,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503554350] [2020-12-22 07:11:14,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:14,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:14,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138710316] [2020-12-22 07:11:14,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:14,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:14,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:14,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:14,316 INFO L87 Difference]: Start difference. First operand 3267 states and 4743 transitions. Second operand 3 states. [2020-12-22 07:11:14,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:14,627 INFO L93 Difference]: Finished difference Result 6492 states and 9429 transitions. [2020-12-22 07:11:14,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:14,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:11:14,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:14,633 INFO L225 Difference]: With dead ends: 6492 [2020-12-22 07:11:14,633 INFO L226 Difference]: Without dead ends: 3267 [2020-12-22 07:11:14,637 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 07:11:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2020-12-22 07:11:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 3267. [2020-12-22 07:11:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2020-12-22 07:11:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4707 transitions. [2020-12-22 07:11:14,854 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4707 transitions. Word has length 160 [2020-12-22 07:11:14,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:14,854 INFO L481 AbstractCegarLoop]: Abstraction has 3267 states and 4707 transitions. [2020-12-22 07:11:14,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4707 transitions. [2020-12-22 07:11:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:14,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:14,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:14,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:11:14,856 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1759277819, now seen corresponding path program 1 times [2020-12-22 07:11:14,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:14,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914104158] [2020-12-22 07:11:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:14,947 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 07:11:14,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914104158] [2020-12-22 07:11:14,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:14,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:14,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542104701] [2020-12-22 07:11:14,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:14,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:14,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:14,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:14,949 INFO L87 Difference]: Start difference. First operand 3267 states and 4707 transitions. Second operand 3 states. [2020-12-22 07:11:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:15,528 INFO L93 Difference]: Finished difference Result 9550 states and 13741 transitions. [2020-12-22 07:11:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:15,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:11:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:15,540 INFO L225 Difference]: With dead ends: 9550 [2020-12-22 07:11:15,540 INFO L226 Difference]: Without dead ends: 6327 [2020-12-22 07:11:15,545 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 07:11:15,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6327 states. [2020-12-22 07:11:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6327 to 6149. [2020-12-22 07:11:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6149 states. [2020-12-22 07:11:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6149 states to 6149 states and 8813 transitions. [2020-12-22 07:11:15,983 INFO L78 Accepts]: Start accepts. Automaton has 6149 states and 8813 transitions. Word has length 160 [2020-12-22 07:11:15,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:15,983 INFO L481 AbstractCegarLoop]: Abstraction has 6149 states and 8813 transitions. [2020-12-22 07:11:15,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 6149 states and 8813 transitions. [2020-12-22 07:11:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:15,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:15,989 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:15,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:11:15,990 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:15,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:15,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1924675808, now seen corresponding path program 1 times [2020-12-22 07:11:15,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:15,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670081648] [2020-12-22 07:11:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:16,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670081648] [2020-12-22 07:11:16,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:16,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:16,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740824376] [2020-12-22 07:11:16,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:16,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:16,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:16,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:16,094 INFO L87 Difference]: Start difference. First operand 6149 states and 8813 transitions. Second operand 5 states. [2020-12-22 07:11:17,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:17,407 INFO L93 Difference]: Finished difference Result 18213 states and 26117 transitions. [2020-12-22 07:11:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:17,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:11:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:17,419 INFO L225 Difference]: With dead ends: 18213 [2020-12-22 07:11:17,419 INFO L226 Difference]: Without dead ends: 12112 [2020-12-22 07:11:17,426 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 07:11:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12112 states. [2020-12-22 07:11:17,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12112 to 6236. [2020-12-22 07:11:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6236 states. [2020-12-22 07:11:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 8872 transitions. [2020-12-22 07:11:17,972 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 8872 transitions. Word has length 261 [2020-12-22 07:11:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:17,972 INFO L481 AbstractCegarLoop]: Abstraction has 6236 states and 8872 transitions. [2020-12-22 07:11:17,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 8872 transitions. [2020-12-22 07:11:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:17,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:17,977 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:17,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:11:17,977 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash -951617956, now seen corresponding path program 1 times [2020-12-22 07:11:17,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:17,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904259692] [2020-12-22 07:11:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:18,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904259692] [2020-12-22 07:11:18,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:18,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:18,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280680879] [2020-12-22 07:11:18,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:18,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:18,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:18,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:18,076 INFO L87 Difference]: Start difference. First operand 6236 states and 8872 transitions. Second operand 5 states. [2020-12-22 07:11:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:19,701 INFO L93 Difference]: Finished difference Result 23824 states and 33951 transitions. [2020-12-22 07:11:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:19,702 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:11:19,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:19,719 INFO L225 Difference]: With dead ends: 23824 [2020-12-22 07:11:19,719 INFO L226 Difference]: Without dead ends: 17643 [2020-12-22 07:11:19,727 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 07:11:19,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17643 states. [2020-12-22 07:11:20,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17643 to 6407. [2020-12-22 07:11:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6407 states. [2020-12-22 07:11:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6407 states to 6407 states and 9043 transitions. [2020-12-22 07:11:20,361 INFO L78 Accepts]: Start accepts. Automaton has 6407 states and 9043 transitions. Word has length 261 [2020-12-22 07:11:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:20,362 INFO L481 AbstractCegarLoop]: Abstraction has 6407 states and 9043 transitions. [2020-12-22 07:11:20,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 6407 states and 9043 transitions. [2020-12-22 07:11:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:20,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:20,367 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:20,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:11:20,367 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:20,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1825283558, now seen corresponding path program 1 times [2020-12-22 07:11:20,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:20,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956832903] [2020-12-22 07:11:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:20,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956832903] [2020-12-22 07:11:20,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:20,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:20,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957688918] [2020-12-22 07:11:20,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:20,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:20,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:20,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:20,462 INFO L87 Difference]: Start difference. First operand 6407 states and 9043 transitions. Second operand 5 states. [2020-12-22 07:11:21,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:21,382 INFO L93 Difference]: Finished difference Result 15431 states and 21734 transitions. [2020-12-22 07:11:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:21,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:11:21,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:21,392 INFO L225 Difference]: With dead ends: 15431 [2020-12-22 07:11:21,392 INFO L226 Difference]: Without dead ends: 9089 [2020-12-22 07:11:21,399 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 07:11:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9089 states. [2020-12-22 07:11:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9089 to 6419. [2020-12-22 07:11:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6419 states. [2020-12-22 07:11:22,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6419 states to 6419 states and 9002 transitions. [2020-12-22 07:11:22,227 INFO L78 Accepts]: Start accepts. Automaton has 6419 states and 9002 transitions. Word has length 261 [2020-12-22 07:11:22,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:22,227 INFO L481 AbstractCegarLoop]: Abstraction has 6419 states and 9002 transitions. [2020-12-22 07:11:22,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6419 states and 9002 transitions. [2020-12-22 07:11:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:22,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:22,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:22,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:11:22,236 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:22,237 INFO L82 PathProgramCache]: Analyzing trace with hash -361301610, now seen corresponding path program 1 times [2020-12-22 07:11:22,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:22,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784071669] [2020-12-22 07:11:22,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:22,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784071669] [2020-12-22 07:11:22,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:22,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:22,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799070929] [2020-12-22 07:11:22,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:22,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:22,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:22,361 INFO L87 Difference]: Start difference. First operand 6419 states and 9002 transitions. Second operand 5 states. [2020-12-22 07:11:24,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:24,128 INFO L93 Difference]: Finished difference Result 23541 states and 33212 transitions. [2020-12-22 07:11:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:24,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:11:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:24,144 INFO L225 Difference]: With dead ends: 23541 [2020-12-22 07:11:24,145 INFO L226 Difference]: Without dead ends: 17194 [2020-12-22 07:11:24,161 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 07:11:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17194 states. [2020-12-22 07:11:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17194 to 6590. [2020-12-22 07:11:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6590 states. [2020-12-22 07:11:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 9173 transitions. [2020-12-22 07:11:24,905 INFO L78 Accepts]: Start accepts. Automaton has 6590 states and 9173 transitions. Word has length 261 [2020-12-22 07:11:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:24,906 INFO L481 AbstractCegarLoop]: Abstraction has 6590 states and 9173 transitions. [2020-12-22 07:11:24,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6590 states and 9173 transitions. [2020-12-22 07:11:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:24,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:24,912 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:24,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:11:24,912 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1938362964, now seen corresponding path program 1 times [2020-12-22 07:11:24,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:24,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830212426] [2020-12-22 07:11:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:25,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830212426] [2020-12-22 07:11:25,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:25,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:25,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200958423] [2020-12-22 07:11:25,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:25,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:25,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:25,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:25,023 INFO L87 Difference]: Start difference. First operand 6590 states and 9173 transitions. Second operand 4 states. [2020-12-22 07:11:26,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:26,727 INFO L93 Difference]: Finished difference Result 22344 states and 31055 transitions. [2020-12-22 07:11:26,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:26,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 261 [2020-12-22 07:11:26,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:26,745 INFO L225 Difference]: With dead ends: 22344 [2020-12-22 07:11:26,745 INFO L226 Difference]: Without dead ends: 15831 [2020-12-22 07:11:26,754 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 07:11:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15831 states. [2020-12-22 07:11:28,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15831 to 12555. [2020-12-22 07:11:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12555 states. [2020-12-22 07:11:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12555 states to 12555 states and 17407 transitions. [2020-12-22 07:11:28,078 INFO L78 Accepts]: Start accepts. Automaton has 12555 states and 17407 transitions. Word has length 261 [2020-12-22 07:11:28,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:28,078 INFO L481 AbstractCegarLoop]: Abstraction has 12555 states and 17407 transitions. [2020-12-22 07:11:28,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 12555 states and 17407 transitions. [2020-12-22 07:11:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:28,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:28,089 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:28,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:11:28,089 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:28,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:28,090 INFO L82 PathProgramCache]: Analyzing trace with hash 604364178, now seen corresponding path program 1 times [2020-12-22 07:11:28,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:28,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780389464] [2020-12-22 07:11:28,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:28,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780389464] [2020-12-22 07:11:28,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:28,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:28,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139776253] [2020-12-22 07:11:28,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:28,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:28,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:28,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:28,223 INFO L87 Difference]: Start difference. First operand 12555 states and 17407 transitions. Second operand 5 states. [2020-12-22 07:11:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:30,568 INFO L93 Difference]: Finished difference Result 35399 states and 49344 transitions. [2020-12-22 07:11:30,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:30,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:11:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:30,594 INFO L225 Difference]: With dead ends: 35399 [2020-12-22 07:11:30,594 INFO L226 Difference]: Without dead ends: 22925 [2020-12-22 07:11:30,610 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 07:11:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22925 states. [2020-12-22 07:11:31,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22925 to 12723. [2020-12-22 07:11:31,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12723 states. [2020-12-22 07:11:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12723 states to 12723 states and 17522 transitions. [2020-12-22 07:11:31,996 INFO L78 Accepts]: Start accepts. Automaton has 12723 states and 17522 transitions. Word has length 261 [2020-12-22 07:11:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:31,996 INFO L481 AbstractCegarLoop]: Abstraction has 12723 states and 17522 transitions. [2020-12-22 07:11:31,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:31,996 INFO L276 IsEmpty]: Start isEmpty. Operand 12723 states and 17522 transitions. [2020-12-22 07:11:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:32,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:32,005 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:32,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 07:11:32,005 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:32,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:32,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1018351374, now seen corresponding path program 1 times [2020-12-22 07:11:32,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:32,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208069532] [2020-12-22 07:11:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:32,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208069532] [2020-12-22 07:11:32,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:32,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:32,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678984905] [2020-12-22 07:11:32,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:32,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:32,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:32,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:32,113 INFO L87 Difference]: Start difference. First operand 12723 states and 17522 transitions. Second operand 4 states. [2020-12-22 07:11:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:35,514 INFO L93 Difference]: Finished difference Result 43354 states and 59620 transitions. [2020-12-22 07:11:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:35,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 261 [2020-12-22 07:11:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:35,553 INFO L225 Difference]: With dead ends: 43354 [2020-12-22 07:11:35,553 INFO L226 Difference]: Without dead ends: 30714 [2020-12-22 07:11:35,568 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 07:11:35,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30714 states. [2020-12-22 07:11:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30714 to 24362. [2020-12-22 07:11:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24362 states. [2020-12-22 07:11:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24362 states to 24362 states and 33423 transitions. [2020-12-22 07:11:38,290 INFO L78 Accepts]: Start accepts. Automaton has 24362 states and 33423 transitions. Word has length 261 [2020-12-22 07:11:38,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:38,290 INFO L481 AbstractCegarLoop]: Abstraction has 24362 states and 33423 transitions. [2020-12-22 07:11:38,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:38,291 INFO L276 IsEmpty]: Start isEmpty. Operand 24362 states and 33423 transitions. [2020-12-22 07:11:38,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:38,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:38,305 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:38,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 07:11:38,305 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:38,306 INFO L82 PathProgramCache]: Analyzing trace with hash 762264365, now seen corresponding path program 1 times [2020-12-22 07:11:38,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:38,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395674712] [2020-12-22 07:11:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:38,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395674712] [2020-12-22 07:11:38,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:38,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:38,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961781942] [2020-12-22 07:11:38,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:38,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:38,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:38,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:38,402 INFO L87 Difference]: Start difference. First operand 24362 states and 33423 transitions. Second operand 5 states. [2020-12-22 07:11:43,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:43,291 INFO L93 Difference]: Finished difference Result 68097 states and 94017 transitions. [2020-12-22 07:11:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:43,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:11:43,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:43,335 INFO L225 Difference]: With dead ends: 68097 [2020-12-22 07:11:43,335 INFO L226 Difference]: Without dead ends: 43822 [2020-12-22 07:11:43,357 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 07:11:43,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43822 states. [2020-12-22 07:11:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43822 to 24686. [2020-12-22 07:11:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24686 states. [2020-12-22 07:11:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24686 states to 24686 states and 33646 transitions. [2020-12-22 07:11:46,428 INFO L78 Accepts]: Start accepts. Automaton has 24686 states and 33646 transitions. Word has length 261 [2020-12-22 07:11:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:46,429 INFO L481 AbstractCegarLoop]: Abstraction has 24686 states and 33646 transitions. [2020-12-22 07:11:46,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:46,429 INFO L276 IsEmpty]: Start isEmpty. Operand 24686 states and 33646 transitions. [2020-12-22 07:11:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:46,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:46,440 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:46,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 07:11:46,440 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:46,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1055000151, now seen corresponding path program 1 times [2020-12-22 07:11:46,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:46,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601331395] [2020-12-22 07:11:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:46,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601331395] [2020-12-22 07:11:46,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:46,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:46,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714681700] [2020-12-22 07:11:46,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:46,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:46,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:46,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:46,577 INFO L87 Difference]: Start difference. First operand 24686 states and 33646 transitions. Second operand 4 states. [2020-12-22 07:11:53,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:53,770 INFO L93 Difference]: Finished difference Result 84143 states and 114515 transitions. [2020-12-22 07:11:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:53,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 261 [2020-12-22 07:11:53,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:53,831 INFO L225 Difference]: With dead ends: 84143 [2020-12-22 07:11:53,831 INFO L226 Difference]: Without dead ends: 59553 [2020-12-22 07:11:53,854 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 07:11:53,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59553 states. [2020-12-22 07:11:59,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59553 to 47365. [2020-12-22 07:11:59,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47365 states. [2020-12-22 07:11:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47365 states to 47365 states and 64319 transitions. [2020-12-22 07:11:59,793 INFO L78 Accepts]: Start accepts. Automaton has 47365 states and 64319 transitions. Word has length 261 [2020-12-22 07:11:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:59,794 INFO L481 AbstractCegarLoop]: Abstraction has 47365 states and 64319 transitions. [2020-12-22 07:11:59,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 47365 states and 64319 transitions. [2020-12-22 07:11:59,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:59,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:59,810 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:59,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-22 07:11:59,810 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:59,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:59,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1123834952, now seen corresponding path program 1 times [2020-12-22 07:11:59,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:59,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489142612] [2020-12-22 07:11:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:59,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489142612] [2020-12-22 07:11:59,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:59,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:59,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799020567] [2020-12-22 07:11:59,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:59,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:59,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:59,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:59,916 INFO L87 Difference]: Start difference. First operand 47365 states and 64319 transitions. Second operand 5 states. [2020-12-22 07:12:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:09,826 INFO L93 Difference]: Finished difference Result 129638 states and 177193 transitions. [2020-12-22 07:12:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:09,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:12:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:10,072 INFO L225 Difference]: With dead ends: 129638 [2020-12-22 07:12:10,072 INFO L226 Difference]: Without dead ends: 82373 [2020-12-22 07:12:10,114 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 07:12:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82373 states. [2020-12-22 07:12:16,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82373 to 47989. [2020-12-22 07:12:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47989 states. [2020-12-22 07:12:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47989 states to 47989 states and 64750 transitions. [2020-12-22 07:12:16,649 INFO L78 Accepts]: Start accepts. Automaton has 47989 states and 64750 transitions. Word has length 261 [2020-12-22 07:12:16,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:16,649 INFO L481 AbstractCegarLoop]: Abstraction has 47989 states and 64750 transitions. [2020-12-22 07:12:16,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 47989 states and 64750 transitions. [2020-12-22 07:12:16,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:12:16,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:16,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:16,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-12-22 07:12:16,666 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:16,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:16,667 INFO L82 PathProgramCache]: Analyzing trace with hash -203950908, now seen corresponding path program 1 times [2020-12-22 07:12:16,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:16,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605284363] [2020-12-22 07:12:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:12:16,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605284363] [2020-12-22 07:12:16,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:16,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:16,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217465084] [2020-12-22 07:12:16,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:16,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:16,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:16,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:16,778 INFO L87 Difference]: Start difference. First operand 47989 states and 64750 transitions. Second operand 5 states. [2020-12-22 07:12:31,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:31,054 INFO L93 Difference]: Finished difference Result 161398 states and 219802 transitions. [2020-12-22 07:12:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:31,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:12:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:31,204 INFO L225 Difference]: With dead ends: 161398 [2020-12-22 07:12:31,204 INFO L226 Difference]: Without dead ends: 113516 [2020-12-22 07:12:31,429 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 07:12:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113516 states. [2020-12-22 07:12:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113516 to 49192. [2020-12-22 07:12:38,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49192 states. [2020-12-22 07:12:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49192 states to 49192 states and 65953 transitions. [2020-12-22 07:12:38,555 INFO L78 Accepts]: Start accepts. Automaton has 49192 states and 65953 transitions. Word has length 261 [2020-12-22 07:12:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:38,555 INFO L481 AbstractCegarLoop]: Abstraction has 49192 states and 65953 transitions. [2020-12-22 07:12:38,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 49192 states and 65953 transitions. [2020-12-22 07:12:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:12:38,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:38,571 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:38,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-12-22 07:12:38,572 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:38,572 INFO L82 PathProgramCache]: Analyzing trace with hash 304827906, now seen corresponding path program 1 times [2020-12-22 07:12:38,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:38,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933999462] [2020-12-22 07:12:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:12:38,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933999462] [2020-12-22 07:12:38,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:38,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:38,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509057215] [2020-12-22 07:12:38,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:38,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:38,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:38,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:38,794 INFO L87 Difference]: Start difference. First operand 49192 states and 65953 transitions. Second operand 4 states. [2020-12-22 07:12:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:54,560 INFO L93 Difference]: Finished difference Result 167411 states and 224122 transitions. [2020-12-22 07:12:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:54,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 261 [2020-12-22 07:12:54,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:54,698 INFO L225 Difference]: With dead ends: 167411 [2020-12-22 07:12:54,698 INFO L226 Difference]: Without dead ends: 118331 [2020-12-22 07:12:54,749 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 07:12:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118331 states. [2020-12-22 07:13:07,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118331 to 94423. [2020-12-22 07:13:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94423 states. [2020-12-22 07:13:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94423 states to 94423 states and 126158 transitions. [2020-12-22 07:13:07,885 INFO L78 Accepts]: Start accepts. Automaton has 94423 states and 126158 transitions. Word has length 261 [2020-12-22 07:13:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:13:07,885 INFO L481 AbstractCegarLoop]: Abstraction has 94423 states and 126158 transitions. [2020-12-22 07:13:07,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:13:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 94423 states and 126158 transitions. [2020-12-22 07:13:07,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:13:07,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:13:07,912 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:07,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-12-22 07:13:07,912 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:13:07,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:13:07,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1492171200, now seen corresponding path program 1 times [2020-12-22 07:13:07,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:13:07,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620920956] [2020-12-22 07:13:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:13:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:13:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:13:07,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620920956] [2020-12-22 07:13:07,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:13:07,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:13:07,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139249136] [2020-12-22 07:13:07,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:13:07,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:13:07,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:13:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:13:07,996 INFO L87 Difference]: Start difference. First operand 94423 states and 126158 transitions. Second operand 5 states. [2020-12-22 07:13:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:13:29,588 INFO L93 Difference]: Finished difference Result 252546 states and 339632 transitions. [2020-12-22 07:13:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:13:29,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:13:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:13:29,980 INFO L225 Difference]: With dead ends: 252546 [2020-12-22 07:13:29,981 INFO L226 Difference]: Without dead ends: 158239 [2020-12-22 07:13:30,054 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 07:13:30,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158239 states. [2020-12-22 07:13:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158239 to 95623. [2020-12-22 07:13:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95623 states. [2020-12-22 07:13:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95623 states to 95623 states and 126989 transitions. [2020-12-22 07:13:44,645 INFO L78 Accepts]: Start accepts. Automaton has 95623 states and 126989 transitions. Word has length 261 [2020-12-22 07:13:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:13:44,647 INFO L481 AbstractCegarLoop]: Abstraction has 95623 states and 126989 transitions. [2020-12-22 07:13:44,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:13:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand 95623 states and 126989 transitions. [2020-12-22 07:13:44,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:13:44,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:13:44,680 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:44,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-12-22 07:13:44,681 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:13:44,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:13:44,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1343214532, now seen corresponding path program 1 times [2020-12-22 07:13:44,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:13:44,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957990335] [2020-12-22 07:13:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:13:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:13:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:13:44,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957990335] [2020-12-22 07:13:44,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:13:44,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:13:44,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538034297] [2020-12-22 07:13:44,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:13:44,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:13:44,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:13:44,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:13:44,781 INFO L87 Difference]: Start difference. First operand 95623 states and 126989 transitions. Second operand 5 states.