/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.13.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:11:46,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:11:46,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:11:46,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:11:46,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:11:46,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:11:46,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:11:46,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:11:46,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:11:46,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:11:46,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:11:46,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:11:46,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:11:46,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:11:46,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:11:46,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:11:46,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:11:46,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:11:46,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:11:46,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:11:46,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:11:46,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:11:46,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:11:46,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:11:46,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:11:46,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:11:46,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:11:46,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:11:46,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:11:46,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:11:46,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:11:46,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:11:46,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:11:46,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:11:46,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:11:46,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:11:46,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:11:46,154 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:11:46,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:11:46,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:11:46,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:11:46,158 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:11:46,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:11:46,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:11:46,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:11:46,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:11:46,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:11:46,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:11:46,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:11:46,160 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:11:46,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:11:46,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:11:46,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:11:46,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:11:46,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:11:46,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:11:46,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:11:46,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:11:46,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:11:46,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:11:46,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:11:46,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:11:46,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:11:46,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:11:46,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:11:46,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:11:46,565 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:11:46,565 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:11:46,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.13.cil-1.c [2020-12-22 07:11:46,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d93553dc0/cfcc302f82344e1b9e75e6cfe93039fb/FLAGe3604eb1c [2020-12-22 07:11:47,271 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:11:47,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.13.cil-1.c [2020-12-22 07:11:47,309 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d93553dc0/cfcc302f82344e1b9e75e6cfe93039fb/FLAGe3604eb1c [2020-12-22 07:11:47,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d93553dc0/cfcc302f82344e1b9e75e6cfe93039fb [2020-12-22 07:11:47,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:11:47,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:11:47,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:11:47,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:11:47,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:11:47,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:11:47" (1/1) ... [2020-12-22 07:11:47,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53a3bdc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:47, skipping insertion in model container [2020-12-22 07:11:47,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:11:47" (1/1) ... [2020-12-22 07:11:47,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:11:47,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:11:47,834 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.13.cil-1.c[366,379] [2020-12-22 07:11:48,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:11:48,042 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:11:48,065 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.13.cil-1.c[366,379] [2020-12-22 07:11:48,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:11:48,289 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:11:48,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:48 WrapperNode [2020-12-22 07:11:48,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:11:48,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:11:48,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:11:48,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:11:48,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:48" (1/1) ... [2020-12-22 07:11:48,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:48" (1/1) ... [2020-12-22 07:11:48,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:11:48,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:11:48,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:11:48,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:11:48,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:48" (1/1) ... [2020-12-22 07:11:48,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:48" (1/1) ... [2020-12-22 07:11:48,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:48" (1/1) ... [2020-12-22 07:11:48,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:48" (1/1) ... [2020-12-22 07:11:48,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:48" (1/1) ... [2020-12-22 07:11:48,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:48" (1/1) ... [2020-12-22 07:11:48,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:48" (1/1) ... [2020-12-22 07:11:48,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:11:48,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:11:48,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:11:48,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:11:48,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:11:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:11:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:11:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:11:48,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:11:51,943 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:11:51,943 INFO L299 CfgBuilder]: Removed 622 assume(true) statements. [2020-12-22 07:11:51,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:11:51 BoogieIcfgContainer [2020-12-22 07:11:51,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:11:51,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:11:51,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:11:51,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:11:51,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:11:47" (1/3) ... [2020-12-22 07:11:51,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9b18f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:11:51, skipping insertion in model container [2020-12-22 07:11:51,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:48" (2/3) ... [2020-12-22 07:11:51,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9b18f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:11:51, skipping insertion in model container [2020-12-22 07:11:51,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:11:51" (3/3) ... [2020-12-22 07:11:51,957 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.13.cil-1.c [2020-12-22 07:11:51,966 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:11:51,974 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 07:11:51,994 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 07:11:52,031 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:11:52,031 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:11:52,031 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:11:52,031 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:11:52,032 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:11:52,032 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:11:52,032 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:11:52,032 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:11:52,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states. [2020-12-22 07:11:52,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:11:52,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:52,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:52,097 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:52,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:52,104 INFO L82 PathProgramCache]: Analyzing trace with hash 585149193, now seen corresponding path program 1 times [2020-12-22 07:11:52,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:52,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733999002] [2020-12-22 07:11:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:52,550 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 07:11:52,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733999002] [2020-12-22 07:11:52,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:52,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:52,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549761909] [2020-12-22 07:11:52,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:52,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:52,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:52,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:52,577 INFO L87 Difference]: Start difference. First operand 1996 states. Second operand 3 states. [2020-12-22 07:11:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:52,768 INFO L93 Difference]: Finished difference Result 3987 states and 5999 transitions. [2020-12-22 07:11:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:52,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-12-22 07:11:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:52,803 INFO L225 Difference]: With dead ends: 3987 [2020-12-22 07:11:52,803 INFO L226 Difference]: Without dead ends: 1992 [2020-12-22 07:11:52,819 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 07:11:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2020-12-22 07:11:52,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1992. [2020-12-22 07:11:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1992 states. [2020-12-22 07:11:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 2964 transitions. [2020-12-22 07:11:52,978 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 2964 transitions. Word has length 171 [2020-12-22 07:11:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:52,979 INFO L481 AbstractCegarLoop]: Abstraction has 1992 states and 2964 transitions. [2020-12-22 07:11:52,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 2964 transitions. [2020-12-22 07:11:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:11:52,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:52,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:52,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:11:52,998 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1992875143, now seen corresponding path program 1 times [2020-12-22 07:11:53,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:53,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001075876] [2020-12-22 07:11:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:53,223 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 07:11:53,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001075876] [2020-12-22 07:11:53,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:53,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:53,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52448498] [2020-12-22 07:11:53,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:53,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:53,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:53,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:53,228 INFO L87 Difference]: Start difference. First operand 1992 states and 2964 transitions. Second operand 3 states. [2020-12-22 07:11:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:53,325 INFO L93 Difference]: Finished difference Result 3971 states and 5906 transitions. [2020-12-22 07:11:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:53,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-12-22 07:11:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:53,372 INFO L225 Difference]: With dead ends: 3971 [2020-12-22 07:11:53,373 INFO L226 Difference]: Without dead ends: 1992 [2020-12-22 07:11:53,378 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 07:11:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2020-12-22 07:11:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1992. [2020-12-22 07:11:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1992 states. [2020-12-22 07:11:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 2963 transitions. [2020-12-22 07:11:53,457 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 2963 transitions. Word has length 171 [2020-12-22 07:11:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:53,461 INFO L481 AbstractCegarLoop]: Abstraction has 1992 states and 2963 transitions. [2020-12-22 07:11:53,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:53,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 2963 transitions. [2020-12-22 07:11:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:11:53,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:53,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:53,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:11:53,466 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:53,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:53,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1325493253, now seen corresponding path program 1 times [2020-12-22 07:11:53,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:53,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732657418] [2020-12-22 07:11:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:53,602 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 07:11:53,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732657418] [2020-12-22 07:11:53,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:53,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:53,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290737086] [2020-12-22 07:11:53,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:53,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:53,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:53,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:53,606 INFO L87 Difference]: Start difference. First operand 1992 states and 2963 transitions. Second operand 3 states. [2020-12-22 07:11:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:53,803 INFO L93 Difference]: Finished difference Result 5688 states and 8435 transitions. [2020-12-22 07:11:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:53,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-12-22 07:11:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:53,832 INFO L225 Difference]: With dead ends: 5688 [2020-12-22 07:11:53,833 INFO L226 Difference]: Without dead ends: 3714 [2020-12-22 07:11:53,837 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 07:11:53,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2020-12-22 07:11:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 3710. [2020-12-22 07:11:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:11:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5497 transitions. [2020-12-22 07:11:54,110 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5497 transitions. Word has length 171 [2020-12-22 07:11:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:54,118 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5497 transitions. [2020-12-22 07:11:54,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5497 transitions. [2020-12-22 07:11:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:11:54,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:54,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:54,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:11:54,121 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:54,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:54,122 INFO L82 PathProgramCache]: Analyzing trace with hash 962370689, now seen corresponding path program 1 times [2020-12-22 07:11:54,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:54,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800282617] [2020-12-22 07:11:54,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:54,301 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 07:11:54,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800282617] [2020-12-22 07:11:54,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:54,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:54,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369189248] [2020-12-22 07:11:54,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:54,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:54,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:54,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:54,307 INFO L87 Difference]: Start difference. First operand 3710 states and 5497 transitions. Second operand 4 states. [2020-12-22 07:11:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:54,644 INFO L93 Difference]: Finished difference Result 9122 states and 13498 transitions. [2020-12-22 07:11:54,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:54,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:11:54,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:54,674 INFO L225 Difference]: With dead ends: 9122 [2020-12-22 07:11:54,674 INFO L226 Difference]: Without dead ends: 5431 [2020-12-22 07:11:54,684 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 07:11:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2020-12-22 07:11:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 3710. [2020-12-22 07:11:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:11:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5494 transitions. [2020-12-22 07:11:54,938 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5494 transitions. Word has length 171 [2020-12-22 07:11:54,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:54,938 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5494 transitions. [2020-12-22 07:11:54,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:54,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5494 transitions. [2020-12-22 07:11:54,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:11:54,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:54,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:54,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:11:54,941 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:54,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:54,943 INFO L82 PathProgramCache]: Analyzing trace with hash -442820989, now seen corresponding path program 1 times [2020-12-22 07:11:54,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:54,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123723281] [2020-12-22 07:11:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:55,057 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 07:11:55,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123723281] [2020-12-22 07:11:55,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:55,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:55,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770376081] [2020-12-22 07:11:55,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:55,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:55,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:55,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:55,062 INFO L87 Difference]: Start difference. First operand 3710 states and 5494 transitions. Second operand 4 states. [2020-12-22 07:11:55,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:55,406 INFO L93 Difference]: Finished difference Result 9120 states and 13488 transitions. [2020-12-22 07:11:55,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:55,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:11:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:55,439 INFO L225 Difference]: With dead ends: 9120 [2020-12-22 07:11:55,439 INFO L226 Difference]: Without dead ends: 5430 [2020-12-22 07:11:55,448 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 07:11:55,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2020-12-22 07:11:55,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 3710. [2020-12-22 07:11:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:11:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5491 transitions. [2020-12-22 07:11:55,722 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5491 transitions. Word has length 171 [2020-12-22 07:11:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:55,722 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5491 transitions. [2020-12-22 07:11:55,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5491 transitions. [2020-12-22 07:11:55,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:11:55,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:55,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:55,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:11:55,726 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:55,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:55,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1451512897, now seen corresponding path program 1 times [2020-12-22 07:11:55,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:55,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754719547] [2020-12-22 07:11:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:55,838 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 07:11:55,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754719547] [2020-12-22 07:11:55,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:55,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:55,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100866895] [2020-12-22 07:11:55,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:55,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:55,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:55,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:55,841 INFO L87 Difference]: Start difference. First operand 3710 states and 5491 transitions. Second operand 3 states. [2020-12-22 07:11:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:56,058 INFO L93 Difference]: Finished difference Result 7398 states and 10946 transitions. [2020-12-22 07:11:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:56,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-12-22 07:11:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:56,079 INFO L225 Difference]: With dead ends: 7398 [2020-12-22 07:11:56,079 INFO L226 Difference]: Without dead ends: 3710 [2020-12-22 07:11:56,086 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 07:11:56,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2020-12-22 07:11:56,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3710. [2020-12-22 07:11:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:11:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5483 transitions. [2020-12-22 07:11:56,304 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5483 transitions. Word has length 171 [2020-12-22 07:11:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:56,304 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5483 transitions. [2020-12-22 07:11:56,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5483 transitions. [2020-12-22 07:11:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:11:56,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:56,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:56,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:11:56,308 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:56,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:56,313 INFO L82 PathProgramCache]: Analyzing trace with hash -501013827, now seen corresponding path program 1 times [2020-12-22 07:11:56,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:56,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473206623] [2020-12-22 07:11:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:56,404 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 07:11:56,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473206623] [2020-12-22 07:11:56,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:56,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:56,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751497226] [2020-12-22 07:11:56,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:56,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:56,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:56,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:56,420 INFO L87 Difference]: Start difference. First operand 3710 states and 5483 transitions. Second operand 3 states. [2020-12-22 07:11:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:56,618 INFO L93 Difference]: Finished difference Result 7397 states and 10929 transitions. [2020-12-22 07:11:56,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:56,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-12-22 07:11:56,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:56,655 INFO L225 Difference]: With dead ends: 7397 [2020-12-22 07:11:56,655 INFO L226 Difference]: Without dead ends: 3710 [2020-12-22 07:11:56,664 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 07:11:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2020-12-22 07:11:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3710. [2020-12-22 07:11:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:11:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5475 transitions. [2020-12-22 07:11:56,829 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5475 transitions. Word has length 171 [2020-12-22 07:11:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:56,829 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5475 transitions. [2020-12-22 07:11:56,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:56,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5475 transitions. [2020-12-22 07:11:56,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:11:56,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:56,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:56,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:11:56,832 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:56,833 INFO L82 PathProgramCache]: Analyzing trace with hash 544380097, now seen corresponding path program 1 times [2020-12-22 07:11:56,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:56,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991179805] [2020-12-22 07:11:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:56,924 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 07:11:56,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991179805] [2020-12-22 07:11:56,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:56,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:56,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119548242] [2020-12-22 07:11:56,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:56,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:56,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:56,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:56,926 INFO L87 Difference]: Start difference. First operand 3710 states and 5475 transitions. Second operand 4 states. [2020-12-22 07:11:57,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:57,310 INFO L93 Difference]: Finished difference Result 9112 states and 13432 transitions. [2020-12-22 07:11:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:57,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:11:57,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:57,329 INFO L225 Difference]: With dead ends: 9112 [2020-12-22 07:11:57,329 INFO L226 Difference]: Without dead ends: 5426 [2020-12-22 07:11:57,341 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 07:11:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2020-12-22 07:11:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 3710. [2020-12-22 07:11:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:11:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5472 transitions. [2020-12-22 07:11:57,633 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5472 transitions. Word has length 171 [2020-12-22 07:11:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:57,633 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5472 transitions. [2020-12-22 07:11:57,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5472 transitions. [2020-12-22 07:11:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:11:57,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:57,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:57,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:11:57,636 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:57,637 INFO L82 PathProgramCache]: Analyzing trace with hash 279732607, now seen corresponding path program 1 times [2020-12-22 07:11:57,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:57,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357256937] [2020-12-22 07:11:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:57,714 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 07:11:57,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357256937] [2020-12-22 07:11:57,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:57,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:57,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444424791] [2020-12-22 07:11:57,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:57,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:57,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:57,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:57,724 INFO L87 Difference]: Start difference. First operand 3710 states and 5472 transitions. Second operand 4 states. [2020-12-22 07:11:58,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:58,074 INFO L93 Difference]: Finished difference Result 9110 states and 13422 transitions. [2020-12-22 07:11:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:58,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:11:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:58,092 INFO L225 Difference]: With dead ends: 9110 [2020-12-22 07:11:58,093 INFO L226 Difference]: Without dead ends: 5425 [2020-12-22 07:11:58,101 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 07:11:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5425 states. [2020-12-22 07:11:58,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5425 to 3710. [2020-12-22 07:11:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:11:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5469 transitions. [2020-12-22 07:11:58,309 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5469 transitions. Word has length 171 [2020-12-22 07:11:58,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:58,309 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5469 transitions. [2020-12-22 07:11:58,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:58,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5469 transitions. [2020-12-22 07:11:58,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:11:58,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:58,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:58,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:11:58,312 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:58,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2084109055, now seen corresponding path program 1 times [2020-12-22 07:11:58,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:58,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889431314] [2020-12-22 07:11:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:58,429 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 07:11:58,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889431314] [2020-12-22 07:11:58,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:58,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:58,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100511768] [2020-12-22 07:11:58,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:58,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:58,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:58,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:58,432 INFO L87 Difference]: Start difference. First operand 3710 states and 5469 transitions. Second operand 4 states. [2020-12-22 07:11:58,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:58,785 INFO L93 Difference]: Finished difference Result 9108 states and 13412 transitions. [2020-12-22 07:11:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:58,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:11:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:58,800 INFO L225 Difference]: With dead ends: 9108 [2020-12-22 07:11:58,800 INFO L226 Difference]: Without dead ends: 5424 [2020-12-22 07:11:58,809 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 07:11:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5424 states. [2020-12-22 07:11:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5424 to 3710. [2020-12-22 07:11:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:11:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5466 transitions. [2020-12-22 07:11:59,049 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5466 transitions. Word has length 171 [2020-12-22 07:11:59,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:59,050 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5466 transitions. [2020-12-22 07:11:59,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:59,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5466 transitions. [2020-12-22 07:11:59,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:11:59,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:59,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:59,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:11:59,053 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:59,054 INFO L82 PathProgramCache]: Analyzing trace with hash 887679295, now seen corresponding path program 1 times [2020-12-22 07:11:59,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:59,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954051459] [2020-12-22 07:11:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:59,131 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 07:11:59,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954051459] [2020-12-22 07:11:59,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:59,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:59,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474520639] [2020-12-22 07:11:59,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:59,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:59,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:59,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:59,135 INFO L87 Difference]: Start difference. First operand 3710 states and 5466 transitions. Second operand 4 states. [2020-12-22 07:11:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:59,592 INFO L93 Difference]: Finished difference Result 9106 states and 13402 transitions. [2020-12-22 07:11:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:59,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:11:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:59,606 INFO L225 Difference]: With dead ends: 9106 [2020-12-22 07:11:59,607 INFO L226 Difference]: Without dead ends: 5423 [2020-12-22 07:11:59,614 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 07:11:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5423 states. [2020-12-22 07:11:59,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5423 to 3710. [2020-12-22 07:11:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:11:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5463 transitions. [2020-12-22 07:11:59,892 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5463 transitions. Word has length 171 [2020-12-22 07:11:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:59,893 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5463 transitions. [2020-12-22 07:11:59,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5463 transitions. [2020-12-22 07:11:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:11:59,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:59,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:59,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:11:59,896 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:59,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1510308543, now seen corresponding path program 1 times [2020-12-22 07:11:59,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:59,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404539325] [2020-12-22 07:11:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:00,011 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 07:12:00,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404539325] [2020-12-22 07:12:00,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:00,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:12:00,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704759913] [2020-12-22 07:12:00,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:12:00,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:00,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:12:00,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:12:00,014 INFO L87 Difference]: Start difference. First operand 3710 states and 5463 transitions. Second operand 3 states. [2020-12-22 07:12:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:00,294 INFO L93 Difference]: Finished difference Result 7392 states and 10884 transitions. [2020-12-22 07:12:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:12:00,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-12-22 07:12:00,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:00,305 INFO L225 Difference]: With dead ends: 7392 [2020-12-22 07:12:00,305 INFO L226 Difference]: Without dead ends: 3710 [2020-12-22 07:12:00,312 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 07:12:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2020-12-22 07:12:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3710. [2020-12-22 07:12:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:00,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5455 transitions. [2020-12-22 07:12:00,530 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5455 transitions. Word has length 171 [2020-12-22 07:12:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:00,530 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5455 transitions. [2020-12-22 07:12:00,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:12:00,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5455 transitions. [2020-12-22 07:12:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:00,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:00,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:00,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:12:00,533 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:00,534 INFO L82 PathProgramCache]: Analyzing trace with hash -897261379, now seen corresponding path program 1 times [2020-12-22 07:12:00,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:00,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791356985] [2020-12-22 07:12:00,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:00,605 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 07:12:00,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791356985] [2020-12-22 07:12:00,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:00,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:00,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124071602] [2020-12-22 07:12:00,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:00,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:00,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:00,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:00,607 INFO L87 Difference]: Start difference. First operand 3710 states and 5455 transitions. Second operand 4 states. [2020-12-22 07:12:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:01,025 INFO L93 Difference]: Finished difference Result 9100 states and 13367 transitions. [2020-12-22 07:12:01,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:01,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:12:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:01,038 INFO L225 Difference]: With dead ends: 9100 [2020-12-22 07:12:01,039 INFO L226 Difference]: Without dead ends: 5420 [2020-12-22 07:12:01,051 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 07:12:01,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5420 states. [2020-12-22 07:12:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5420 to 3710. [2020-12-22 07:12:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5452 transitions. [2020-12-22 07:12:01,268 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5452 transitions. Word has length 171 [2020-12-22 07:12:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:01,269 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5452 transitions. [2020-12-22 07:12:01,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:01,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5452 transitions. [2020-12-22 07:12:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:01,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:01,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:01,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:12:01,272 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1437690885, now seen corresponding path program 1 times [2020-12-22 07:12:01,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:01,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289038364] [2020-12-22 07:12:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:01,336 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 07:12:01,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289038364] [2020-12-22 07:12:01,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:01,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:12:01,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151350822] [2020-12-22 07:12:01,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:12:01,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:01,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:12:01,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:12:01,339 INFO L87 Difference]: Start difference. First operand 3710 states and 5452 transitions. Second operand 3 states. [2020-12-22 07:12:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:01,551 INFO L93 Difference]: Finished difference Result 7389 states and 10858 transitions. [2020-12-22 07:12:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:12:01,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-12-22 07:12:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:01,560 INFO L225 Difference]: With dead ends: 7389 [2020-12-22 07:12:01,560 INFO L226 Difference]: Without dead ends: 3710 [2020-12-22 07:12:01,569 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 07:12:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2020-12-22 07:12:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3710. [2020-12-22 07:12:01,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:01,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5444 transitions. [2020-12-22 07:12:01,782 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5444 transitions. Word has length 171 [2020-12-22 07:12:01,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:01,782 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5444 transitions. [2020-12-22 07:12:01,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:12:01,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5444 transitions. [2020-12-22 07:12:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:01,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:01,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:01,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:12:01,785 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:01,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:01,786 INFO L82 PathProgramCache]: Analyzing trace with hash -207468033, now seen corresponding path program 1 times [2020-12-22 07:12:01,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:01,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060344872] [2020-12-22 07:12:01,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:01,906 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 07:12:01,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060344872] [2020-12-22 07:12:01,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:01,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:01,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743253776] [2020-12-22 07:12:01,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:01,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:01,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:01,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:01,910 INFO L87 Difference]: Start difference. First operand 3710 states and 5444 transitions. Second operand 4 states. [2020-12-22 07:12:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:02,383 INFO L93 Difference]: Finished difference Result 8998 states and 13196 transitions. [2020-12-22 07:12:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:02,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:12:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:02,396 INFO L225 Difference]: With dead ends: 8998 [2020-12-22 07:12:02,396 INFO L226 Difference]: Without dead ends: 5320 [2020-12-22 07:12:02,405 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 07:12:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5320 states. [2020-12-22 07:12:02,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5320 to 3710. [2020-12-22 07:12:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5441 transitions. [2020-12-22 07:12:02,659 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5441 transitions. Word has length 171 [2020-12-22 07:12:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:02,659 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5441 transitions. [2020-12-22 07:12:02,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5441 transitions. [2020-12-22 07:12:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:02,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:02,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:02,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:12:02,661 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:02,662 INFO L82 PathProgramCache]: Analyzing trace with hash 203142333, now seen corresponding path program 1 times [2020-12-22 07:12:02,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:02,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154254398] [2020-12-22 07:12:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:02,734 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 07:12:02,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154254398] [2020-12-22 07:12:02,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:02,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:02,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826410091] [2020-12-22 07:12:02,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:02,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:02,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:02,739 INFO L87 Difference]: Start difference. First operand 3710 states and 5441 transitions. Second operand 4 states. [2020-12-22 07:12:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:03,284 INFO L93 Difference]: Finished difference Result 8996 states and 13186 transitions. [2020-12-22 07:12:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:03,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:12:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:03,295 INFO L225 Difference]: With dead ends: 8996 [2020-12-22 07:12:03,296 INFO L226 Difference]: Without dead ends: 5319 [2020-12-22 07:12:03,302 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 07:12:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2020-12-22 07:12:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 3710. [2020-12-22 07:12:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:03,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5438 transitions. [2020-12-22 07:12:03,542 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5438 transitions. Word has length 171 [2020-12-22 07:12:03,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:03,542 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5438 transitions. [2020-12-22 07:12:03,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:03,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5438 transitions. [2020-12-22 07:12:03,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:03,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:03,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:03,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:12:03,544 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1584727489, now seen corresponding path program 1 times [2020-12-22 07:12:03,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:03,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965133316] [2020-12-22 07:12:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:12:03,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965133316] [2020-12-22 07:12:03,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:03,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:12:03,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033089702] [2020-12-22 07:12:03,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:12:03,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:03,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:12:03,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:12:03,615 INFO L87 Difference]: Start difference. First operand 3710 states and 5438 transitions. Second operand 3 states. [2020-12-22 07:12:03,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:03,904 INFO L93 Difference]: Finished difference Result 7386 states and 10827 transitions. [2020-12-22 07:12:03,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:12:03,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-12-22 07:12:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:03,916 INFO L225 Difference]: With dead ends: 7386 [2020-12-22 07:12:03,916 INFO L226 Difference]: Without dead ends: 3710 [2020-12-22 07:12:03,924 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 07:12:03,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2020-12-22 07:12:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3710. [2020-12-22 07:12:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5400 transitions. [2020-12-22 07:12:04,169 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5400 transitions. Word has length 171 [2020-12-22 07:12:04,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:04,170 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5400 transitions. [2020-12-22 07:12:04,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:12:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5400 transitions. [2020-12-22 07:12:04,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:04,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:04,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:04,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:12:04,172 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:04,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:04,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1653021692, now seen corresponding path program 1 times [2020-12-22 07:12:04,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:04,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964283660] [2020-12-22 07:12:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:04,272 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 07:12:04,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964283660] [2020-12-22 07:12:04,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:04,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:04,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442515813] [2020-12-22 07:12:04,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:04,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:04,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:04,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:04,275 INFO L87 Difference]: Start difference. First operand 3710 states and 5400 transitions. Second operand 4 states. [2020-12-22 07:12:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:04,890 INFO L93 Difference]: Finished difference Result 8992 states and 13082 transitions. [2020-12-22 07:12:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:04,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:12:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:04,905 INFO L225 Difference]: With dead ends: 8992 [2020-12-22 07:12:04,906 INFO L226 Difference]: Without dead ends: 5317 [2020-12-22 07:12:04,914 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 07:12:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5317 states. [2020-12-22 07:12:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5317 to 3710. [2020-12-22 07:12:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5397 transitions. [2020-12-22 07:12:05,194 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5397 transitions. Word has length 171 [2020-12-22 07:12:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:05,194 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5397 transitions. [2020-12-22 07:12:05,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5397 transitions. [2020-12-22 07:12:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:05,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:05,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:05,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:12:05,197 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:05,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1722669566, now seen corresponding path program 1 times [2020-12-22 07:12:05,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:05,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544807622] [2020-12-22 07:12:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:05,269 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 07:12:05,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544807622] [2020-12-22 07:12:05,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:05,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:05,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397046779] [2020-12-22 07:12:05,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:05,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:05,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:05,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:05,272 INFO L87 Difference]: Start difference. First operand 3710 states and 5397 transitions. Second operand 4 states. [2020-12-22 07:12:05,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:05,850 INFO L93 Difference]: Finished difference Result 8990 states and 13072 transitions. [2020-12-22 07:12:05,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:05,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:12:05,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:05,861 INFO L225 Difference]: With dead ends: 8990 [2020-12-22 07:12:05,861 INFO L226 Difference]: Without dead ends: 5316 [2020-12-22 07:12:05,867 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 07:12:05,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5316 states. [2020-12-22 07:12:06,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5316 to 3710. [2020-12-22 07:12:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5394 transitions. [2020-12-22 07:12:06,135 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5394 transitions. Word has length 171 [2020-12-22 07:12:06,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:06,136 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5394 transitions. [2020-12-22 07:12:06,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:06,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5394 transitions. [2020-12-22 07:12:06,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:06,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:06,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:06,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:12:06,138 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:06,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:06,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2140558268, now seen corresponding path program 1 times [2020-12-22 07:12:06,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:06,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074690511] [2020-12-22 07:12:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:06,241 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 07:12:06,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074690511] [2020-12-22 07:12:06,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:06,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:06,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994545098] [2020-12-22 07:12:06,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:06,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:06,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:06,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:06,244 INFO L87 Difference]: Start difference. First operand 3710 states and 5394 transitions. Second operand 4 states. [2020-12-22 07:12:06,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:06,817 INFO L93 Difference]: Finished difference Result 8986 states and 13058 transitions. [2020-12-22 07:12:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:06,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:12:06,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:06,831 INFO L225 Difference]: With dead ends: 8986 [2020-12-22 07:12:06,831 INFO L226 Difference]: Without dead ends: 5314 [2020-12-22 07:12:06,839 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 07:12:06,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2020-12-22 07:12:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 3710. [2020-12-22 07:12:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5391 transitions. [2020-12-22 07:12:07,134 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5391 transitions. Word has length 171 [2020-12-22 07:12:07,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:07,135 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5391 transitions. [2020-12-22 07:12:07,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:07,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5391 transitions. [2020-12-22 07:12:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:07,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:07,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:07,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:12:07,137 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:07,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:07,137 INFO L82 PathProgramCache]: Analyzing trace with hash 523117818, now seen corresponding path program 1 times [2020-12-22 07:12:07,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:07,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423262866] [2020-12-22 07:12:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:07,239 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 07:12:07,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423262866] [2020-12-22 07:12:07,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:07,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:07,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247374712] [2020-12-22 07:12:07,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:07,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:07,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:07,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:07,243 INFO L87 Difference]: Start difference. First operand 3710 states and 5391 transitions. Second operand 4 states. [2020-12-22 07:12:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:07,804 INFO L93 Difference]: Finished difference Result 8984 states and 13048 transitions. [2020-12-22 07:12:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:07,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:12:07,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:07,814 INFO L225 Difference]: With dead ends: 8984 [2020-12-22 07:12:07,814 INFO L226 Difference]: Without dead ends: 5313 [2020-12-22 07:12:07,820 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 07:12:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2020-12-22 07:12:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 3710. [2020-12-22 07:12:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5388 transitions. [2020-12-22 07:12:08,067 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5388 transitions. Word has length 171 [2020-12-22 07:12:08,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:08,067 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5388 transitions. [2020-12-22 07:12:08,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:08,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5388 transitions. [2020-12-22 07:12:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:08,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:08,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:08,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:12:08,069 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:08,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:08,069 INFO L82 PathProgramCache]: Analyzing trace with hash 886584316, now seen corresponding path program 1 times [2020-12-22 07:12:08,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:08,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191320207] [2020-12-22 07:12:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:08,129 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 07:12:08,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191320207] [2020-12-22 07:12:08,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:08,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:08,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083365020] [2020-12-22 07:12:08,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:08,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:08,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:08,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:08,132 INFO L87 Difference]: Start difference. First operand 3710 states and 5388 transitions. Second operand 4 states. [2020-12-22 07:12:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:08,659 INFO L93 Difference]: Finished difference Result 8982 states and 13038 transitions. [2020-12-22 07:12:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:08,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:12:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:08,665 INFO L225 Difference]: With dead ends: 8982 [2020-12-22 07:12:08,666 INFO L226 Difference]: Without dead ends: 5312 [2020-12-22 07:12:08,670 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 07:12:08,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2020-12-22 07:12:08,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 3710. [2020-12-22 07:12:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5385 transitions. [2020-12-22 07:12:08,960 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5385 transitions. Word has length 171 [2020-12-22 07:12:08,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:08,960 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5385 transitions. [2020-12-22 07:12:08,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:08,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5385 transitions. [2020-12-22 07:12:08,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:08,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:08,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:08,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:12:08,962 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:08,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:08,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1175403706, now seen corresponding path program 1 times [2020-12-22 07:12:08,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:08,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343820760] [2020-12-22 07:12:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:09,025 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 07:12:09,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343820760] [2020-12-22 07:12:09,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:09,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:09,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442667688] [2020-12-22 07:12:09,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:09,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:09,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:09,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:09,027 INFO L87 Difference]: Start difference. First operand 3710 states and 5385 transitions. Second operand 4 states. [2020-12-22 07:12:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:09,520 INFO L93 Difference]: Finished difference Result 8980 states and 13028 transitions. [2020-12-22 07:12:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:09,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:12:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:09,527 INFO L225 Difference]: With dead ends: 8980 [2020-12-22 07:12:09,528 INFO L226 Difference]: Without dead ends: 5311 [2020-12-22 07:12:09,532 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 07:12:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2020-12-22 07:12:10,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 3710. [2020-12-22 07:12:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5382 transitions. [2020-12-22 07:12:10,081 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5382 transitions. Word has length 171 [2020-12-22 07:12:10,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:10,082 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5382 transitions. [2020-12-22 07:12:10,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5382 transitions. [2020-12-22 07:12:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:10,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:10,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:10,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:12:10,085 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:10,086 INFO L82 PathProgramCache]: Analyzing trace with hash 630531132, now seen corresponding path program 1 times [2020-12-22 07:12:10,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:10,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305773092] [2020-12-22 07:12:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:10,216 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 07:12:10,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305773092] [2020-12-22 07:12:10,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:10,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:10,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701715344] [2020-12-22 07:12:10,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:10,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:10,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:10,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:10,223 INFO L87 Difference]: Start difference. First operand 3710 states and 5382 transitions. Second operand 4 states. [2020-12-22 07:12:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:10,823 INFO L93 Difference]: Finished difference Result 8978 states and 13018 transitions. [2020-12-22 07:12:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:10,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:12:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:10,830 INFO L225 Difference]: With dead ends: 8978 [2020-12-22 07:12:10,831 INFO L226 Difference]: Without dead ends: 5310 [2020-12-22 07:12:10,835 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 07:12:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2020-12-22 07:12:11,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 3710. [2020-12-22 07:12:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5379 transitions. [2020-12-22 07:12:11,209 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5379 transitions. Word has length 171 [2020-12-22 07:12:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:11,210 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5379 transitions. [2020-12-22 07:12:11,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5379 transitions. [2020-12-22 07:12:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:11,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:11,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:11,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:12:11,212 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1305691258, now seen corresponding path program 1 times [2020-12-22 07:12:11,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:11,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118433765] [2020-12-22 07:12:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:12:11,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118433765] [2020-12-22 07:12:11,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:11,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:11,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509754408] [2020-12-22 07:12:11,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:11,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:11,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:11,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:11,287 INFO L87 Difference]: Start difference. First operand 3710 states and 5379 transitions. Second operand 4 states. [2020-12-22 07:12:11,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:11,932 INFO L93 Difference]: Finished difference Result 8976 states and 13008 transitions. [2020-12-22 07:12:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:11,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 07:12:11,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:11,938 INFO L225 Difference]: With dead ends: 8976 [2020-12-22 07:12:11,938 INFO L226 Difference]: Without dead ends: 5309 [2020-12-22 07:12:11,943 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 07:12:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5309 states. [2020-12-22 07:12:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5309 to 3710. [2020-12-22 07:12:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5376 transitions. [2020-12-22 07:12:12,301 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5376 transitions. Word has length 171 [2020-12-22 07:12:12,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:12,301 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5376 transitions. [2020-12-22 07:12:12,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5376 transitions. [2020-12-22 07:12:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:12,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:12,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:12,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:12:12,303 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:12,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:12,304 INFO L82 PathProgramCache]: Analyzing trace with hash 357639292, now seen corresponding path program 1 times [2020-12-22 07:12:12,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:12,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287029210] [2020-12-22 07:12:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:12,365 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 07:12:12,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287029210] [2020-12-22 07:12:12,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:12,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:12:12,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68436063] [2020-12-22 07:12:12,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:12:12,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:12,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:12:12,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:12:12,367 INFO L87 Difference]: Start difference. First operand 3710 states and 5376 transitions. Second operand 3 states. [2020-12-22 07:12:12,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:12,709 INFO L93 Difference]: Finished difference Result 7376 states and 10692 transitions. [2020-12-22 07:12:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:12:12,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-12-22 07:12:12,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:12,714 INFO L225 Difference]: With dead ends: 7376 [2020-12-22 07:12:12,715 INFO L226 Difference]: Without dead ends: 3710 [2020-12-22 07:12:12,722 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 07:12:12,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2020-12-22 07:12:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3710. [2020-12-22 07:12:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-12-22 07:12:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5338 transitions. [2020-12-22 07:12:12,976 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5338 transitions. Word has length 171 [2020-12-22 07:12:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:12,977 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 5338 transitions. [2020-12-22 07:12:12,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:12:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5338 transitions. [2020-12-22 07:12:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 07:12:12,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:12,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:12,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:12:12,978 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:12,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1248200712, now seen corresponding path program 1 times [2020-12-22 07:12:12,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:12,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007335874] [2020-12-22 07:12:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:13,037 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 07:12:13,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007335874] [2020-12-22 07:12:13,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:13,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:12:13,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497942176] [2020-12-22 07:12:13,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:12:13,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:13,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:12:13,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:12:13,040 INFO L87 Difference]: Start difference. First operand 3710 states and 5338 transitions. Second operand 3 states. [2020-12-22 07:12:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:13,631 INFO L93 Difference]: Finished difference Result 10862 states and 15608 transitions. [2020-12-22 07:12:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:12:13,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-12-22 07:12:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:13,643 INFO L225 Difference]: With dead ends: 10862 [2020-12-22 07:12:13,643 INFO L226 Difference]: Without dead ends: 7199 [2020-12-22 07:12:13,650 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 07:12:13,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7199 states. [2020-12-22 07:12:14,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7199 to 7007. [2020-12-22 07:12:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7007 states. [2020-12-22 07:12:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 10032 transitions. [2020-12-22 07:12:14,192 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 10032 transitions. Word has length 171 [2020-12-22 07:12:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:14,197 INFO L481 AbstractCegarLoop]: Abstraction has 7007 states and 10032 transitions. [2020-12-22 07:12:14,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:12:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 10032 transitions. [2020-12-22 07:12:14,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 07:12:14,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:14,211 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:14,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:12:14,211 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:14,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1901972393, now seen corresponding path program 1 times [2020-12-22 07:12:14,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:14,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187392201] [2020-12-22 07:12:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:14,337 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 07:12:14,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187392201] [2020-12-22 07:12:14,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:14,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:14,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679375482] [2020-12-22 07:12:14,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:14,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:14,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:14,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:14,339 INFO L87 Difference]: Start difference. First operand 7007 states and 10032 transitions. Second operand 5 states. [2020-12-22 07:12:15,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:15,885 INFO L93 Difference]: Finished difference Result 20770 states and 29750 transitions. [2020-12-22 07:12:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:15,886 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 279 [2020-12-22 07:12:15,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:15,906 INFO L225 Difference]: With dead ends: 20770 [2020-12-22 07:12:15,907 INFO L226 Difference]: Without dead ends: 13814 [2020-12-22 07:12:15,917 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 07:12:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13814 states. [2020-12-22 07:12:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13814 to 7100. [2020-12-22 07:12:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7100 states. [2020-12-22 07:12:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7100 states to 7100 states and 10095 transitions. [2020-12-22 07:12:16,435 INFO L78 Accepts]: Start accepts. Automaton has 7100 states and 10095 transitions. Word has length 279 [2020-12-22 07:12:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:16,435 INFO L481 AbstractCegarLoop]: Abstraction has 7100 states and 10095 transitions. [2020-12-22 07:12:16,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 7100 states and 10095 transitions. [2020-12-22 07:12:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 07:12:16,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:16,443 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:16,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:12:16,444 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:16,444 INFO L82 PathProgramCache]: Analyzing trace with hash 831621293, now seen corresponding path program 1 times [2020-12-22 07:12:16,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:16,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870038267] [2020-12-22 07:12:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:16,553 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 07:12:16,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870038267] [2020-12-22 07:12:16,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:16,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:16,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503756875] [2020-12-22 07:12:16,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:16,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:16,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:16,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:16,556 INFO L87 Difference]: Start difference. First operand 7100 states and 10095 transitions. Second operand 5 states. [2020-12-22 07:12:17,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:17,820 INFO L93 Difference]: Finished difference Result 16851 states and 23960 transitions. [2020-12-22 07:12:17,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:17,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 279 [2020-12-22 07:12:17,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:17,832 INFO L225 Difference]: With dead ends: 16851 [2020-12-22 07:12:17,832 INFO L226 Difference]: Without dead ends: 9816 [2020-12-22 07:12:17,843 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 07:12:17,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2020-12-22 07:12:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 7112. [2020-12-22 07:12:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7112 states. [2020-12-22 07:12:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7112 states to 7112 states and 10050 transitions. [2020-12-22 07:12:18,463 INFO L78 Accepts]: Start accepts. Automaton has 7112 states and 10050 transitions. Word has length 279 [2020-12-22 07:12:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:18,463 INFO L481 AbstractCegarLoop]: Abstraction has 7112 states and 10050 transitions. [2020-12-22 07:12:18,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 7112 states and 10050 transitions. [2020-12-22 07:12:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 07:12:18,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:18,475 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:18,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:12:18,476 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:18,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:18,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1814713423, now seen corresponding path program 1 times [2020-12-22 07:12:18,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:18,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622226756] [2020-12-22 07:12:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:18,582 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 07:12:18,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622226756] [2020-12-22 07:12:18,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:18,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:18,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199885401] [2020-12-22 07:12:18,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:18,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:18,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:18,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:18,585 INFO L87 Difference]: Start difference. First operand 7112 states and 10050 transitions. Second operand 5 states. [2020-12-22 07:12:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:20,373 INFO L93 Difference]: Finished difference Result 26357 states and 37400 transitions. [2020-12-22 07:12:20,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:20,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 279 [2020-12-22 07:12:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:20,396 INFO L225 Difference]: With dead ends: 26357 [2020-12-22 07:12:20,397 INFO L226 Difference]: Without dead ends: 19317 [2020-12-22 07:12:20,410 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 07:12:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19317 states. [2020-12-22 07:12:21,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19317 to 7295. [2020-12-22 07:12:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7295 states. [2020-12-22 07:12:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7295 states to 7295 states and 10233 transitions. [2020-12-22 07:12:21,219 INFO L78 Accepts]: Start accepts. Automaton has 7295 states and 10233 transitions. Word has length 279 [2020-12-22 07:12:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:21,219 INFO L481 AbstractCegarLoop]: Abstraction has 7295 states and 10233 transitions. [2020-12-22 07:12:21,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 7295 states and 10233 transitions. [2020-12-22 07:12:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 07:12:21,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:21,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:21,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:12:21,226 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:21,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:21,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1684848845, now seen corresponding path program 1 times [2020-12-22 07:12:21,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:21,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129424610] [2020-12-22 07:12:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:21,344 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 07:12:21,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129424610] [2020-12-22 07:12:21,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:21,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:21,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510899048] [2020-12-22 07:12:21,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:21,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:21,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:21,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:21,346 INFO L87 Difference]: Start difference. First operand 7295 states and 10233 transitions. Second operand 4 states. [2020-12-22 07:12:23,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:23,417 INFO L93 Difference]: Finished difference Result 24796 states and 34728 transitions. [2020-12-22 07:12:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:23,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 279 [2020-12-22 07:12:23,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:23,436 INFO L225 Difference]: With dead ends: 24796 [2020-12-22 07:12:23,436 INFO L226 Difference]: Without dead ends: 17578 [2020-12-22 07:12:23,445 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 07:12:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17578 states. [2020-12-22 07:12:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17578 to 13936. [2020-12-22 07:12:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13936 states. [2020-12-22 07:12:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13936 states to 13936 states and 19473 transitions. [2020-12-22 07:12:24,792 INFO L78 Accepts]: Start accepts. Automaton has 13936 states and 19473 transitions. Word has length 279 [2020-12-22 07:12:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:24,792 INFO L481 AbstractCegarLoop]: Abstraction has 13936 states and 19473 transitions. [2020-12-22 07:12:24,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 13936 states and 19473 transitions. [2020-12-22 07:12:24,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 07:12:24,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:24,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:24,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:12:24,803 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:24,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:24,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1833167988, now seen corresponding path program 1 times [2020-12-22 07:12:24,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:24,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350972096] [2020-12-22 07:12:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:24,904 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 07:12:24,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350972096] [2020-12-22 07:12:24,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:24,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:24,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214345976] [2020-12-22 07:12:24,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:24,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:24,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:24,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:24,906 INFO L87 Difference]: Start difference. First operand 13936 states and 19473 transitions. Second operand 5 states. [2020-12-22 07:12:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:27,438 INFO L93 Difference]: Finished difference Result 39557 states and 55516 transitions. [2020-12-22 07:12:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:27,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 279 [2020-12-22 07:12:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:27,470 INFO L225 Difference]: With dead ends: 39557 [2020-12-22 07:12:27,470 INFO L226 Difference]: Without dead ends: 25702 [2020-12-22 07:12:27,485 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 07:12:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25702 states. [2020-12-22 07:12:28,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25702 to 14116. [2020-12-22 07:12:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14116 states. [2020-12-22 07:12:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14116 states to 14116 states and 19596 transitions. [2020-12-22 07:12:28,866 INFO L78 Accepts]: Start accepts. Automaton has 14116 states and 19596 transitions. Word has length 279 [2020-12-22 07:12:28,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:28,866 INFO L481 AbstractCegarLoop]: Abstraction has 14116 states and 19596 transitions. [2020-12-22 07:12:28,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 14116 states and 19596 transitions. [2020-12-22 07:12:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 07:12:28,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:28,876 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:28,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 07:12:28,877 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:28,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash 697223542, now seen corresponding path program 1 times [2020-12-22 07:12:28,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:28,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669664994] [2020-12-22 07:12:28,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:28,992 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 07:12:28,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669664994] [2020-12-22 07:12:28,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:28,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:28,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182839117] [2020-12-22 07:12:28,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:28,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:28,995 INFO L87 Difference]: Start difference. First operand 14116 states and 19596 transitions. Second operand 5 states. [2020-12-22 07:12:32,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:32,908 INFO L93 Difference]: Finished difference Result 50475 states and 70550 transitions. [2020-12-22 07:12:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:32,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 279 [2020-12-22 07:12:32,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:32,949 INFO L225 Difference]: With dead ends: 50475 [2020-12-22 07:12:32,949 INFO L226 Difference]: Without dead ends: 36447 [2020-12-22 07:12:32,963 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 07:12:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36447 states. [2020-12-22 07:12:34,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36447 to 14467. [2020-12-22 07:12:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14467 states. [2020-12-22 07:12:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14467 states to 14467 states and 19947 transitions. [2020-12-22 07:12:34,427 INFO L78 Accepts]: Start accepts. Automaton has 14467 states and 19947 transitions. Word has length 279 [2020-12-22 07:12:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:34,427 INFO L481 AbstractCegarLoop]: Abstraction has 14467 states and 19947 transitions. [2020-12-22 07:12:34,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:34,427 INFO L276 IsEmpty]: Start isEmpty. Operand 14467 states and 19947 transitions. [2020-12-22 07:12:34,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 07:12:34,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:34,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:34,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 07:12:34,435 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:34,435 INFO L82 PathProgramCache]: Analyzing trace with hash 981209080, now seen corresponding path program 1 times [2020-12-22 07:12:34,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:34,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463741828] [2020-12-22 07:12:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:34,730 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 07:12:34,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463741828] [2020-12-22 07:12:34,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:34,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:12:34,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12816813] [2020-12-22 07:12:34,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:12:34,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:34,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:12:34,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:12:34,737 INFO L87 Difference]: Start difference. First operand 14467 states and 19947 transitions. Second operand 3 states. [2020-12-22 07:12:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:37,713 INFO L93 Difference]: Finished difference Result 42168 states and 58114 transitions. [2020-12-22 07:12:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:12:37,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 279 [2020-12-22 07:12:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:37,745 INFO L225 Difference]: With dead ends: 42168 [2020-12-22 07:12:37,746 INFO L226 Difference]: Without dead ends: 27794 [2020-12-22 07:12:37,760 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 07:12:37,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27794 states. [2020-12-22 07:12:40,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27794 to 27774. [2020-12-22 07:12:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27774 states. [2020-12-22 07:12:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27774 states to 27774 states and 38152 transitions. [2020-12-22 07:12:40,812 INFO L78 Accepts]: Start accepts. Automaton has 27774 states and 38152 transitions. Word has length 279 [2020-12-22 07:12:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:40,812 INFO L481 AbstractCegarLoop]: Abstraction has 27774 states and 38152 transitions. [2020-12-22 07:12:40,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:12:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand 27774 states and 38152 transitions. [2020-12-22 07:12:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 07:12:40,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:40,822 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:40,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 07:12:40,823 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:40,823 INFO L82 PathProgramCache]: Analyzing trace with hash -304228679, now seen corresponding path program 1 times [2020-12-22 07:12:40,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:40,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607107658] [2020-12-22 07:12:40,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:41,026 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 07:12:41,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607107658] [2020-12-22 07:12:41,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:41,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:41,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038975760] [2020-12-22 07:12:41,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:41,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:41,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:41,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:41,030 INFO L87 Difference]: Start difference. First operand 27774 states and 38152 transitions. Second operand 5 states. [2020-12-22 07:12:46,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:46,482 INFO L93 Difference]: Finished difference Result 77147 states and 106580 transitions. [2020-12-22 07:12:46,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:46,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 279 [2020-12-22 07:12:46,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:46,534 INFO L225 Difference]: With dead ends: 77147 [2020-12-22 07:12:46,534 INFO L226 Difference]: Without dead ends: 49470 [2020-12-22 07:12:46,559 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 07:12:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49470 states. [2020-12-22 07:12:49,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49470 to 28122. [2020-12-22 07:12:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28122 states. [2020-12-22 07:12:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28122 states to 28122 states and 38391 transitions. [2020-12-22 07:12:49,947 INFO L78 Accepts]: Start accepts. Automaton has 28122 states and 38391 transitions. Word has length 279 [2020-12-22 07:12:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:49,947 INFO L481 AbstractCegarLoop]: Abstraction has 28122 states and 38391 transitions. [2020-12-22 07:12:49,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 28122 states and 38391 transitions. [2020-12-22 07:12:49,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 07:12:49,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:49,958 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:49,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-22 07:12:49,959 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:49,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:49,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1417528765, now seen corresponding path program 1 times [2020-12-22 07:12:49,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:49,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796555876] [2020-12-22 07:12:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:50,068 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 07:12:50,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796555876] [2020-12-22 07:12:50,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:50,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:50,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862179512] [2020-12-22 07:12:50,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:50,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:50,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:50,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:50,070 INFO L87 Difference]: Start difference. First operand 28122 states and 38391 transitions. Second operand 4 states. [2020-12-22 07:12:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:57,881 INFO L93 Difference]: Finished difference Result 96080 states and 130976 transitions. [2020-12-22 07:12:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:57,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 279 [2020-12-22 07:12:57,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:57,956 INFO L225 Difference]: With dead ends: 96080 [2020-12-22 07:12:57,956 INFO L226 Difference]: Without dead ends: 68057 [2020-12-22 07:12:57,981 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 07:12:58,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68057 states. [2020-12-22 07:13:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68057 to 54097. [2020-12-22 07:13:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54097 states. [2020-12-22 07:13:04,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54097 states to 54097 states and 73584 transitions. [2020-12-22 07:13:04,291 INFO L78 Accepts]: Start accepts. Automaton has 54097 states and 73584 transitions. Word has length 279 [2020-12-22 07:13:04,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:13:04,292 INFO L481 AbstractCegarLoop]: Abstraction has 54097 states and 73584 transitions. [2020-12-22 07:13:04,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:13:04,292 INFO L276 IsEmpty]: Start isEmpty. Operand 54097 states and 73584 transitions. [2020-12-22 07:13:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 07:13:04,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:13:04,310 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:13:04,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-12-22 07:13:04,310 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:13:04,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:13:04,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1966111681, now seen corresponding path program 1 times [2020-12-22 07:13:04,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:13:04,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507506112] [2020-12-22 07:13:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:13:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:13:04,571 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 07:13:04,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507506112] [2020-12-22 07:13:04,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:13:04,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:13:04,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33757599] [2020-12-22 07:13:04,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:13:04,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:13:04,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:13:04,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:13:04,573 INFO L87 Difference]: Start difference. First operand 54097 states and 73584 transitions. Second operand 5 states. [2020-12-22 07:13:15,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:13:15,319 INFO L93 Difference]: Finished difference Result 148875 states and 203790 transitions. [2020-12-22 07:13:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:13:15,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 279 [2020-12-22 07:13:15,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:13:15,427 INFO L225 Difference]: With dead ends: 148875 [2020-12-22 07:13:15,427 INFO L226 Difference]: Without dead ends: 94881 [2020-12-22 07:13:15,468 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 07:13:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94881 states. [2020-12-22 07:13:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94881 to 54769. [2020-12-22 07:13:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54769 states. [2020-12-22 07:13:22,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54769 states to 54769 states and 74047 transitions. [2020-12-22 07:13:22,335 INFO L78 Accepts]: Start accepts. Automaton has 54769 states and 74047 transitions. Word has length 279 [2020-12-22 07:13:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:13:22,335 INFO L481 AbstractCegarLoop]: Abstraction has 54769 states and 74047 transitions. [2020-12-22 07:13:22,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:13:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 54769 states and 74047 transitions. [2020-12-22 07:13:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 07:13:22,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:13:22,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:13:22,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-12-22 07:13:22,355 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:13:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:13:22,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1480587709, now seen corresponding path program 1 times [2020-12-22 07:13:22,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:13:22,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499068867] [2020-12-22 07:13:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:13:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:13:22,627 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 07:13:22,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499068867] [2020-12-22 07:13:22,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:13:22,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:13:22,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554143731] [2020-12-22 07:13:22,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:13:22,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:13:22,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:13:22,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:13:22,632 INFO L87 Difference]: Start difference. First operand 54769 states and 74047 transitions. Second operand 4 states. [2020-12-22 07:13:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:13:38,169 INFO L93 Difference]: Finished difference Result 186901 states and 252316 transitions. [2020-12-22 07:13:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:13:38,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 279 [2020-12-22 07:13:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:13:38,322 INFO L225 Difference]: With dead ends: 186901 [2020-12-22 07:13:38,322 INFO L226 Difference]: Without dead ends: 132244 [2020-12-22 07:13:38,375 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 07:13:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132244 states. [2020-12-22 07:13:51,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132244 to 105408. [2020-12-22 07:13:51,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105408 states. [2020-12-22 07:13:51,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105408 states to 105408 states and 142012 transitions. [2020-12-22 07:13:51,747 INFO L78 Accepts]: Start accepts. Automaton has 105408 states and 142012 transitions. Word has length 279 [2020-12-22 07:13:51,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:13:51,748 INFO L481 AbstractCegarLoop]: Abstraction has 105408 states and 142012 transitions. [2020-12-22 07:13:51,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:13:51,748 INFO L276 IsEmpty]: Start isEmpty. Operand 105408 states and 142012 transitions. [2020-12-22 07:13:51,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 07:13:51,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:13:51,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:13:51,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-12-22 07:13:51,773 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:13:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:13:51,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1542059973, now seen corresponding path program 1 times [2020-12-22 07:13:51,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:13:51,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964407179] [2020-12-22 07:13:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:13:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:13:51,897 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 07:13:51,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964407179] [2020-12-22 07:13:51,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:13:51,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:13:51,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568682750] [2020-12-22 07:13:51,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:13:51,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:13:51,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:13:51,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:13:51,899 INFO L87 Difference]: Start difference. First operand 105408 states and 142012 transitions. Second operand 5 states. [2020-12-22 07:14:14,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:14:14,001 INFO L93 Difference]: Finished difference Result 284228 states and 385306 transitions. [2020-12-22 07:14:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:14:14,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 279 [2020-12-22 07:14:14,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:14:14,249 INFO L225 Difference]: With dead ends: 284228 [2020-12-22 07:14:14,249 INFO L226 Difference]: Without dead ends: 178936 [2020-12-22 07:14:14,359 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 07:14:14,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178936 states. [2020-12-22 07:14:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178936 to 106704. [2020-12-22 07:14:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106704 states. [2020-12-22 07:14:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106704 states to 106704 states and 142907 transitions. [2020-12-22 07:14:28,856 INFO L78 Accepts]: Start accepts. Automaton has 106704 states and 142907 transitions. Word has length 279 [2020-12-22 07:14:28,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:14:28,857 INFO L481 AbstractCegarLoop]: Abstraction has 106704 states and 142907 transitions. [2020-12-22 07:14:28,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:14:28,857 INFO L276 IsEmpty]: Start isEmpty. Operand 106704 states and 142907 transitions. [2020-12-22 07:14:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 07:14:28,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:14:28,891 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:14:28,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-12-22 07:14:28,892 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:14:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:14:28,892 INFO L82 PathProgramCache]: Analyzing trace with hash -466985015, now seen corresponding path program 1 times [2020-12-22 07:14:28,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:14:28,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813215505] [2020-12-22 07:14:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:14:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:14:29,205 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 07:14:29,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813215505] [2020-12-22 07:14:29,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:14:29,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:14:29,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395653212] [2020-12-22 07:14:29,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:14:29,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:14:29,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:14:29,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:14:29,207 INFO L87 Difference]: Start difference. First operand 106704 states and 142907 transitions. Second operand 5 states.