/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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:53:28,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:53:28,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:53:28,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:53:28,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:53:28,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:53:28,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:53:28,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:53:28,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:53:28,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:53:28,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:53:28,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:53:28,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:53:28,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:53:28,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:53:28,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:53:28,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:53:28,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:53:28,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:53:28,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:53:28,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:53:28,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:53:28,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:53:28,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:53:28,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:53:28,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:53:28,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:53:28,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:53:28,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:53:28,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:53:28,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:53:28,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:53:28,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:53:28,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:53:28,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:53:28,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:53:28,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:53:28,278 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:53:28,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:53:28,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:53:28,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:53:28,284 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:53:28,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:53:28,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:53:28,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:53:28,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:53:28,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:53:28,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:53:28,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:53:28,287 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:53:28,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:53:28,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:53:28,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:53:28,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:53:28,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:53:28,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:53:28,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:53:28,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:53:28,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:53:28,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:53:28,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:53:28,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:53:28,290 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:53:28,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:53:28,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:53:28,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:53:28,710 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:53:28,710 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:53:28,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label01.c [2020-12-22 09:53:28,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b4b782f2/702a0546f6b249289e0e74d513d3f846/FLAG25204775e [2020-12-22 09:53:29,923 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:53:29,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label01.c [2020-12-22 09:53:29,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b4b782f2/702a0546f6b249289e0e74d513d3f846/FLAG25204775e [2020-12-22 09:53:30,372 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b4b782f2/702a0546f6b249289e0e74d513d3f846 [2020-12-22 09:53:30,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:53:30,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:53:30,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:53:30,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:53:30,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:53:30,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:53:30" (1/1) ... [2020-12-22 09:53:30,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1719d2d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:30, skipping insertion in model container [2020-12-22 09:53:30,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:53:30" (1/1) ... [2020-12-22 09:53:30,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:53:30,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:53:31,019 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label01.c[11730,11743] [2020-12-22 09:53:31,104 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label01.c[17042,17055] [2020-12-22 09:53:32,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:53:32,172 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:53:32,210 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label01.c[11730,11743] [2020-12-22 09:53:32,222 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label01.c[17042,17055] [2020-12-22 09:53:32,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:53:32,844 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:53:32,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:32 WrapperNode [2020-12-22 09:53:32,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:53:32,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:53:32,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:53:32,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:53:32,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:32" (1/1) ... [2020-12-22 09:53:32,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:32" (1/1) ... [2020-12-22 09:53:33,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:53:33,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:53:33,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:53:33,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:53:33,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:32" (1/1) ... [2020-12-22 09:53:33,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:32" (1/1) ... [2020-12-22 09:53:33,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:32" (1/1) ... [2020-12-22 09:53:33,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:32" (1/1) ... [2020-12-22 09:53:33,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:32" (1/1) ... [2020-12-22 09:53:33,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:32" (1/1) ... [2020-12-22 09:53:33,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:32" (1/1) ... [2020-12-22 09:53:33,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:53:33,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:53:33,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:53:33,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:53:33,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:32" (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 09:53:34,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:53:34,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:53:34,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:53:34,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:53:39,600 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:53:39,600 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:53:39,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:53:39 BoogieIcfgContainer [2020-12-22 09:53:39,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:53:39,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:53:39,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:53:39,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:53:39,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:53:30" (1/3) ... [2020-12-22 09:53:39,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583ed57d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:53:39, skipping insertion in model container [2020-12-22 09:53:39,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:32" (2/3) ... [2020-12-22 09:53:39,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583ed57d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:53:39, skipping insertion in model container [2020-12-22 09:53:39,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:53:39" (3/3) ... [2020-12-22 09:53:39,613 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label01.c [2020-12-22 09:53:39,620 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:53:39,626 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:53:39,647 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:53:39,682 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:53:39,682 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:53:39,682 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:53:39,682 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:53:39,683 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:53:39,683 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:53:39,683 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:53:39,683 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:53:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states. [2020-12-22 09:53:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:53:39,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:39,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:39,730 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:39,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:39,737 INFO L82 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2020-12-22 09:53:39,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:39,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338139732] [2020-12-22 09:53:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:40,010 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 09:53:40,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338139732] [2020-12-22 09:53:40,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:40,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:53:40,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813159215] [2020-12-22 09:53:40,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:53:40,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:40,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:53:40,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:53:40,042 INFO L87 Difference]: Start difference. First operand 909 states. Second operand 2 states. [2020-12-22 09:53:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:40,139 INFO L93 Difference]: Finished difference Result 1781 states and 3374 transitions. [2020-12-22 09:53:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:53:40,141 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:53:40,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:40,166 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:53:40,167 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:53:40,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:53:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:53:40,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:53:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:53:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1589 transitions. [2020-12-22 09:53:40,288 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1589 transitions. Word has length 34 [2020-12-22 09:53:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:40,289 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1589 transitions. [2020-12-22 09:53:40,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:53:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1589 transitions. [2020-12-22 09:53:40,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:53:40,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:40,291 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] [2020-12-22 09:53:40,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:53:40,292 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:40,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:40,293 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:53:40,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:40,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947885666] [2020-12-22 09:53:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:40,427 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 09:53:40,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947885666] [2020-12-22 09:53:40,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:40,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:40,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526191688] [2020-12-22 09:53:40,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:53:40,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:40,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:53:40,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:53:40,433 INFO L87 Difference]: Start difference. First operand 843 states and 1589 transitions. Second operand 5 states. [2020-12-22 09:53:40,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:40,584 INFO L93 Difference]: Finished difference Result 899 states and 1675 transitions. [2020-12-22 09:53:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:53:40,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:53:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:40,592 INFO L225 Difference]: With dead ends: 899 [2020-12-22 09:53:40,593 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:53:40,595 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 09:53:40,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:53:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:53:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:53:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1558 transitions. [2020-12-22 09:53:40,628 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1558 transitions. Word has length 34 [2020-12-22 09:53:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:40,628 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1558 transitions. [2020-12-22 09:53:40,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:53:40,629 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1558 transitions. [2020-12-22 09:53:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 09:53:40,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:40,635 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] [2020-12-22 09:53:40,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:53:40,636 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash 694349877, now seen corresponding path program 1 times [2020-12-22 09:53:40,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:40,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821859332] [2020-12-22 09:53:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:40,917 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 09:53:40,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821859332] [2020-12-22 09:53:40,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:40,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:40,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422798801] [2020-12-22 09:53:40,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:53:40,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:40,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:53:40,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:53:40,931 INFO L87 Difference]: Start difference. First operand 843 states and 1558 transitions. Second operand 4 states. [2020-12-22 09:53:52,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:52,425 INFO L93 Difference]: Finished difference Result 3098 states and 5867 transitions. [2020-12-22 09:53:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:53:52,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 09:53:52,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:52,441 INFO L225 Difference]: With dead ends: 3098 [2020-12-22 09:53:52,441 INFO L226 Difference]: Without dead ends: 2345 [2020-12-22 09:53:52,444 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 09:53:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2020-12-22 09:53:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2345. [2020-12-22 09:53:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2345 states. [2020-12-22 09:53:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3672 transitions. [2020-12-22 09:53:52,509 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3672 transitions. Word has length 48 [2020-12-22 09:53:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:52,510 INFO L481 AbstractCegarLoop]: Abstraction has 2345 states and 3672 transitions. [2020-12-22 09:53:52,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:53:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3672 transitions. [2020-12-22 09:53:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:52,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:52,512 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] [2020-12-22 09:53:52,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:53:52,512 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:52,513 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:53:52,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:52,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700476153] [2020-12-22 09:53:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:52,642 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 09:53:52,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700476153] [2020-12-22 09:53:52,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:52,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:52,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353959952] [2020-12-22 09:53:52,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:52,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:52,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:52,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:52,646 INFO L87 Difference]: Start difference. First operand 2345 states and 3672 transitions. Second operand 3 states. [2020-12-22 09:53:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:52,701 INFO L93 Difference]: Finished difference Result 2443 states and 3826 transitions. [2020-12-22 09:53:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:52,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:53:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:52,716 INFO L225 Difference]: With dead ends: 2443 [2020-12-22 09:53:52,716 INFO L226 Difference]: Without dead ends: 2391 [2020-12-22 09:53:52,718 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 09:53:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2020-12-22 09:53:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2389. [2020-12-22 09:53:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2389 states. [2020-12-22 09:53:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 3742 transitions. [2020-12-22 09:53:52,787 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 3742 transitions. Word has length 64 [2020-12-22 09:53:52,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:52,790 INFO L481 AbstractCegarLoop]: Abstraction has 2389 states and 3742 transitions. [2020-12-22 09:53:52,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:52,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 3742 transitions. [2020-12-22 09:53:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:52,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:52,792 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] [2020-12-22 09:53:52,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:53:52,792 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:52,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:52,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:53:52,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:52,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220410373] [2020-12-22 09:53:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:52,955 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 09:53:52,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220410373] [2020-12-22 09:53:52,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:52,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:52,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575136088] [2020-12-22 09:53:52,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:52,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:52,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:52,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:52,962 INFO L87 Difference]: Start difference. First operand 2389 states and 3742 transitions. Second operand 3 states. [2020-12-22 09:53:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:53,024 INFO L93 Difference]: Finished difference Result 2569 states and 4026 transitions. [2020-12-22 09:53:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:53,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:53:53,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:53,041 INFO L225 Difference]: With dead ends: 2569 [2020-12-22 09:53:53,042 INFO L226 Difference]: Without dead ends: 2473 [2020-12-22 09:53:53,044 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 09:53:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2020-12-22 09:53:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2471. [2020-12-22 09:53:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2471 states. [2020-12-22 09:53:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3871 transitions. [2020-12-22 09:53:53,126 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3871 transitions. Word has length 64 [2020-12-22 09:53:53,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:53,127 INFO L481 AbstractCegarLoop]: Abstraction has 2471 states and 3871 transitions. [2020-12-22 09:53:53,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:53,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3871 transitions. [2020-12-22 09:53:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:53,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:53,130 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] [2020-12-22 09:53:53,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:53:53,130 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:53,131 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:53:53,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:53,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202187507] [2020-12-22 09:53:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:53,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202187507] [2020-12-22 09:53:53,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:53,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:53,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231686456] [2020-12-22 09:53:53,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:53,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:53,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:53,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:53,234 INFO L87 Difference]: Start difference. First operand 2471 states and 3871 transitions. Second operand 3 states. [2020-12-22 09:53:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:53,305 INFO L93 Difference]: Finished difference Result 2803 states and 4393 transitions. [2020-12-22 09:53:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:53,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:53:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:53,326 INFO L225 Difference]: With dead ends: 2803 [2020-12-22 09:53:53,326 INFO L226 Difference]: Without dead ends: 2625 [2020-12-22 09:53:53,328 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 09:53:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2020-12-22 09:53:53,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2623. [2020-12-22 09:53:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2623 states. [2020-12-22 09:53:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 4107 transitions. [2020-12-22 09:53:53,432 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 4107 transitions. Word has length 64 [2020-12-22 09:53:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:53,432 INFO L481 AbstractCegarLoop]: Abstraction has 2623 states and 4107 transitions. [2020-12-22 09:53:53,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 4107 transitions. [2020-12-22 09:53:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:53,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:53,434 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] [2020-12-22 09:53:53,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:53:53,435 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:53:53,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:53,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153011465] [2020-12-22 09:53:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:53,534 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 09:53:53,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153011465] [2020-12-22 09:53:53,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:53,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:53,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73307975] [2020-12-22 09:53:53,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:53,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:53,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:53,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:53,538 INFO L87 Difference]: Start difference. First operand 2623 states and 4107 transitions. Second operand 3 states. [2020-12-22 09:53:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:53,609 INFO L93 Difference]: Finished difference Result 3235 states and 5061 transitions. [2020-12-22 09:53:53,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:53,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:53:53,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:53,630 INFO L225 Difference]: With dead ends: 3235 [2020-12-22 09:53:53,630 INFO L226 Difference]: Without dead ends: 2905 [2020-12-22 09:53:53,634 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 09:53:53,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2020-12-22 09:53:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2903. [2020-12-22 09:53:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2903 states. [2020-12-22 09:53:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 4535 transitions. [2020-12-22 09:53:53,737 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 4535 transitions. Word has length 64 [2020-12-22 09:53:53,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:53,737 INFO L481 AbstractCegarLoop]: Abstraction has 2903 states and 4535 transitions. [2020-12-22 09:53:53,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 4535 transitions. [2020-12-22 09:53:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:53,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:53,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:53,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:53:53,738 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:53:53,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:53,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624719632] [2020-12-22 09:53:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:53,825 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 09:53:53,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624719632] [2020-12-22 09:53:53,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:53,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:53,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541369575] [2020-12-22 09:53:53,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:53,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:53,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:53,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:53,828 INFO L87 Difference]: Start difference. First operand 2903 states and 4535 transitions. Second operand 3 states. [2020-12-22 09:53:53,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:53,924 INFO L93 Difference]: Finished difference Result 4027 states and 6265 transitions. [2020-12-22 09:53:53,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:53,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:53:53,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:53,945 INFO L225 Difference]: With dead ends: 4027 [2020-12-22 09:53:53,945 INFO L226 Difference]: Without dead ends: 3417 [2020-12-22 09:53:53,948 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 09:53:53,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2020-12-22 09:53:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3415. [2020-12-22 09:53:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3415 states. [2020-12-22 09:53:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 5303 transitions. [2020-12-22 09:53:54,098 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 5303 transitions. Word has length 64 [2020-12-22 09:53:54,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:54,100 INFO L481 AbstractCegarLoop]: Abstraction has 3415 states and 5303 transitions. [2020-12-22 09:53:54,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:54,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 5303 transitions. [2020-12-22 09:53:54,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:54,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:54,101 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] [2020-12-22 09:53:54,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:53:54,101 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:54,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:54,102 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:53:54,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:54,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100277526] [2020-12-22 09:53:54,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:54,231 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 09:53:54,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100277526] [2020-12-22 09:53:54,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:54,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:54,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415689742] [2020-12-22 09:53:54,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:54,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:54,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:54,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:54,236 INFO L87 Difference]: Start difference. First operand 3415 states and 5303 transitions. Second operand 7 states. [2020-12-22 09:53:55,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:55,146 INFO L93 Difference]: Finished difference Result 14635 states and 22433 transitions. [2020-12-22 09:53:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:53:55,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:53:55,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:55,223 INFO L225 Difference]: With dead ends: 14635 [2020-12-22 09:53:55,223 INFO L226 Difference]: Without dead ends: 13513 [2020-12-22 09:53:55,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:53:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13513 states. [2020-12-22 09:53:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13513 to 4535. [2020-12-22 09:53:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4535 states. [2020-12-22 09:53:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4535 states to 4535 states and 6951 transitions. [2020-12-22 09:53:55,655 INFO L78 Accepts]: Start accepts. Automaton has 4535 states and 6951 transitions. Word has length 64 [2020-12-22 09:53:55,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:55,655 INFO L481 AbstractCegarLoop]: Abstraction has 4535 states and 6951 transitions. [2020-12-22 09:53:55,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4535 states and 6951 transitions. [2020-12-22 09:53:55,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:55,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:55,663 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] [2020-12-22 09:53:55,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:53:55,663 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:55,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:55,664 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:53:55,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:55,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071521590] [2020-12-22 09:53:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:55,737 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 09:53:55,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071521590] [2020-12-22 09:53:55,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:55,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:55,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416415504] [2020-12-22 09:53:55,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:55,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:55,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:55,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:55,743 INFO L87 Difference]: Start difference. First operand 4535 states and 6951 transitions. Second operand 3 states. [2020-12-22 09:53:56,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:56,040 INFO L93 Difference]: Finished difference Result 7821 states and 11867 transitions. [2020-12-22 09:53:56,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:56,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:56,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:56,056 INFO L225 Difference]: With dead ends: 7821 [2020-12-22 09:53:56,056 INFO L226 Difference]: Without dead ends: 5579 [2020-12-22 09:53:56,062 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 09:53:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2020-12-22 09:53:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 5577. [2020-12-22 09:53:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:53:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8457 transitions. [2020-12-22 09:53:56,381 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8457 transitions. Word has length 66 [2020-12-22 09:53:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:56,381 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8457 transitions. [2020-12-22 09:53:56,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8457 transitions. [2020-12-22 09:53:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:56,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:56,383 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] [2020-12-22 09:53:56,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:53:56,383 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:56,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:56,384 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:53:56,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:56,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858384622] [2020-12-22 09:53:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:56,612 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 09:53:56,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858384622] [2020-12-22 09:53:56,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:56,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:56,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41304107] [2020-12-22 09:53:56,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:56,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:56,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:56,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:56,616 INFO L87 Difference]: Start difference. First operand 5577 states and 8457 transitions. Second operand 7 states. [2020-12-22 09:53:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:57,103 INFO L93 Difference]: Finished difference Result 8861 states and 13323 transitions. [2020-12-22 09:53:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:57,104 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:53:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:57,118 INFO L225 Difference]: With dead ends: 8861 [2020-12-22 09:53:57,118 INFO L226 Difference]: Without dead ends: 5579 [2020-12-22 09:53:57,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:53:57,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2020-12-22 09:53:57,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 5577. [2020-12-22 09:53:57,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:53:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8409 transitions. [2020-12-22 09:53:57,435 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8409 transitions. Word has length 66 [2020-12-22 09:53:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:57,436 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8409 transitions. [2020-12-22 09:53:57,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8409 transitions. [2020-12-22 09:53:57,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:53:57,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:57,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:57,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:53:57,437 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:57,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:53:57,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:57,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206021251] [2020-12-22 09:53:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:57,566 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 09:53:57,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206021251] [2020-12-22 09:53:57,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:57,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:57,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905352393] [2020-12-22 09:53:57,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:53:57,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:57,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:53:57,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:53:57,574 INFO L87 Difference]: Start difference. First operand 5577 states and 8409 transitions. Second operand 6 states. [2020-12-22 09:53:58,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:58,050 INFO L93 Difference]: Finished difference Result 8859 states and 13226 transitions. [2020-12-22 09:53:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:53:58,051 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:53:58,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:58,064 INFO L225 Difference]: With dead ends: 8859 [2020-12-22 09:53:58,064 INFO L226 Difference]: Without dead ends: 5577 [2020-12-22 09:53:58,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:53:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5577 states. [2020-12-22 09:53:58,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5577 to 5577. [2020-12-22 09:53:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:53:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8361 transitions. [2020-12-22 09:53:58,391 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8361 transitions. Word has length 67 [2020-12-22 09:53:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:58,392 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8361 transitions. [2020-12-22 09:53:58,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:53:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8361 transitions. [2020-12-22 09:53:58,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:53:58,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:58,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:58,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:53:58,393 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:58,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 09:53:58,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:58,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304074231] [2020-12-22 09:53:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:58,474 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 09:53:58,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304074231] [2020-12-22 09:53:58,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:58,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:58,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478555802] [2020-12-22 09:53:58,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:53:58,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:58,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:53:58,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:53:58,482 INFO L87 Difference]: Start difference. First operand 5577 states and 8361 transitions. Second operand 6 states. [2020-12-22 09:53:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:58,907 INFO L93 Difference]: Finished difference Result 8859 states and 13130 transitions. [2020-12-22 09:53:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:53:58,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:53:58,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:58,921 INFO L225 Difference]: With dead ends: 8859 [2020-12-22 09:53:58,921 INFO L226 Difference]: Without dead ends: 5577 [2020-12-22 09:53:58,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:53:58,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5577 states. [2020-12-22 09:53:59,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5577 to 5577. [2020-12-22 09:53:59,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:53:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8313 transitions. [2020-12-22 09:53:59,270 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8313 transitions. Word has length 67 [2020-12-22 09:53:59,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:59,271 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8313 transitions. [2020-12-22 09:53:59,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:53:59,271 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8313 transitions. [2020-12-22 09:53:59,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:53:59,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:59,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:59,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:53:59,273 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:59,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:59,273 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 09:53:59,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:59,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303299781] [2020-12-22 09:53:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:59,370 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 09:53:59,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303299781] [2020-12-22 09:53:59,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:59,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:59,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45570205] [2020-12-22 09:53:59,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:53:59,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:59,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:53:59,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:53:59,372 INFO L87 Difference]: Start difference. First operand 5577 states and 8313 transitions. Second operand 5 states. [2020-12-22 09:53:59,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:59,974 INFO L93 Difference]: Finished difference Result 8420 states and 12287 transitions. [2020-12-22 09:53:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:59,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:53:59,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:59,993 INFO L225 Difference]: With dead ends: 8420 [2020-12-22 09:53:59,994 INFO L226 Difference]: Without dead ends: 8418 [2020-12-22 09:53:59,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:54:00,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2020-12-22 09:54:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 5769. [2020-12-22 09:54:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5769 states. [2020-12-22 09:54:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8489 transitions. [2020-12-22 09:54:00,460 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8489 transitions. Word has length 67 [2020-12-22 09:54:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:00,460 INFO L481 AbstractCegarLoop]: Abstraction has 5769 states and 8489 transitions. [2020-12-22 09:54:00,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:54:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8489 transitions. [2020-12-22 09:54:00,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:54:00,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:00,464 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] [2020-12-22 09:54:00,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:54:00,465 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:00,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:00,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2020-12-22 09:54:00,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:00,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840930825] [2020-12-22 09:54:00,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:54:00,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840930825] [2020-12-22 09:54:00,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:00,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:54:00,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924573917] [2020-12-22 09:54:00,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:54:00,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:00,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:54:00,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:54:00,595 INFO L87 Difference]: Start difference. First operand 5769 states and 8489 transitions. Second operand 7 states. [2020-12-22 09:54:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:02,233 INFO L93 Difference]: Finished difference Result 23845 states and 33919 transitions. [2020-12-22 09:54:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:54:02,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:54:02,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:02,276 INFO L225 Difference]: With dead ends: 23845 [2020-12-22 09:54:02,277 INFO L226 Difference]: Without dead ends: 20371 [2020-12-22 09:54:02,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:54:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2020-12-22 09:54:02,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2020-12-22 09:54:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2020-12-22 09:54:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13337 transitions. [2020-12-22 09:54:02,964 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13337 transitions. Word has length 95 [2020-12-22 09:54:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:02,965 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 13337 transitions. [2020-12-22 09:54:02,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:54:02,965 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13337 transitions. [2020-12-22 09:54:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:54:02,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:02,970 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] [2020-12-22 09:54:02,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:54:02,970 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2020-12-22 09:54:02,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:02,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758101340] [2020-12-22 09:54:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:54:03,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758101340] [2020-12-22 09:54:03,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:03,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:54:03,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708649343] [2020-12-22 09:54:03,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:54:03,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:03,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:54:03,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:54:03,094 INFO L87 Difference]: Start difference. First operand 9241 states and 13337 transitions. Second operand 7 states. [2020-12-22 09:54:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:04,630 INFO L93 Difference]: Finished difference Result 27317 states and 38767 transitions. [2020-12-22 09:54:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:54:04,630 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:54:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:04,679 INFO L225 Difference]: With dead ends: 27317 [2020-12-22 09:54:04,679 INFO L226 Difference]: Without dead ends: 23843 [2020-12-22 09:54:04,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:54:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2020-12-22 09:54:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2020-12-22 09:54:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14457 states. [2020-12-22 09:54:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 20569 transitions. [2020-12-22 09:54:05,900 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 20569 transitions. Word has length 95 [2020-12-22 09:54:05,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:05,900 INFO L481 AbstractCegarLoop]: Abstraction has 14457 states and 20569 transitions. [2020-12-22 09:54:05,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:54:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 20569 transitions. [2020-12-22 09:54:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:54:05,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:05,906 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] [2020-12-22 09:54:05,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:54:05,906 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:05,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:05,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2020-12-22 09:54:05,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:05,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205113881] [2020-12-22 09:54:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:54:06,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205113881] [2020-12-22 09:54:06,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:06,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:54:06,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357064996] [2020-12-22 09:54:06,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:54:06,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:06,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:54:06,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:54:06,021 INFO L87 Difference]: Start difference. First operand 14457 states and 20569 transitions. Second operand 7 states. [2020-12-22 09:54:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:07,940 INFO L93 Difference]: Finished difference Result 30789 states and 43615 transitions. [2020-12-22 09:54:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:54:07,941 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:54:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:07,994 INFO L225 Difference]: With dead ends: 30789 [2020-12-22 09:54:07,994 INFO L226 Difference]: Without dead ends: 27315 [2020-12-22 09:54:08,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:54:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2020-12-22 09:54:09,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2020-12-22 09:54:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17929 states. [2020-12-22 09:54:09,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25417 transitions. [2020-12-22 09:54:09,372 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25417 transitions. Word has length 95 [2020-12-22 09:54:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:09,372 INFO L481 AbstractCegarLoop]: Abstraction has 17929 states and 25417 transitions. [2020-12-22 09:54:09,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:54:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25417 transitions. [2020-12-22 09:54:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:54:09,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:09,378 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] [2020-12-22 09:54:09,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:54:09,379 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:09,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2020-12-22 09:54:09,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:09,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686321077] [2020-12-22 09:54:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:54:09,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686321077] [2020-12-22 09:54:09,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:09,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:54:09,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131913210] [2020-12-22 09:54:09,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:54:09,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:09,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:54:09,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:54:09,493 INFO L87 Difference]: Start difference. First operand 17929 states and 25417 transitions. Second operand 7 states. [2020-12-22 09:54:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:11,446 INFO L93 Difference]: Finished difference Result 34261 states and 48463 transitions. [2020-12-22 09:54:11,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:54:11,447 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:54:11,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:11,493 INFO L225 Difference]: With dead ends: 34261 [2020-12-22 09:54:11,493 INFO L226 Difference]: Without dead ends: 30787 [2020-12-22 09:54:11,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:54:11,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2020-12-22 09:54:13,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2020-12-22 09:54:13,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21401 states. [2020-12-22 09:54:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30265 transitions. [2020-12-22 09:54:13,085 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30265 transitions. Word has length 95 [2020-12-22 09:54:13,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:13,086 INFO L481 AbstractCegarLoop]: Abstraction has 21401 states and 30265 transitions. [2020-12-22 09:54:13,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:54:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30265 transitions. [2020-12-22 09:54:13,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:54:13,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:13,094 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] [2020-12-22 09:54:13,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:54:13,094 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:13,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:13,095 INFO L82 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2020-12-22 09:54:13,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:13,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359430302] [2020-12-22 09:54:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:54:13,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359430302] [2020-12-22 09:54:13,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:13,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:54:13,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261599516] [2020-12-22 09:54:13,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:54:13,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:13,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:54:13,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:54:13,213 INFO L87 Difference]: Start difference. First operand 21401 states and 30265 transitions. Second operand 7 states. [2020-12-22 09:54:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:15,816 INFO L93 Difference]: Finished difference Result 35653 states and 50431 transitions. [2020-12-22 09:54:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:54:15,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:54:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:15,863 INFO L225 Difference]: With dead ends: 35653 [2020-12-22 09:54:15,864 INFO L226 Difference]: Without dead ends: 33219 [2020-12-22 09:54:15,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:54:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33219 states. [2020-12-22 09:54:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33219 to 23833. [2020-12-22 09:54:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23833 states. [2020-12-22 09:54:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23833 states to 23833 states and 33689 transitions. [2020-12-22 09:54:17,762 INFO L78 Accepts]: Start accepts. Automaton has 23833 states and 33689 transitions. Word has length 95 [2020-12-22 09:54:17,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:17,762 INFO L481 AbstractCegarLoop]: Abstraction has 23833 states and 33689 transitions. [2020-12-22 09:54:17,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:54:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 23833 states and 33689 transitions. [2020-12-22 09:54:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:54:17,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:17,770 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-12-22 09:54:17,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:54:17,771 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:17,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:17,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2020-12-22 09:54:17,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:17,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096371465] [2020-12-22 09:54:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:18,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096371465] [2020-12-22 09:54:18,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436448553] [2020-12-22 09:54:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:54:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:18,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 09:54:18,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:54:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:54:18,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:54:18,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:54:18,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116534682] [2020-12-22 09:54:18,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 09:54:18,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:18,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 09:54:18,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 09:54:18,638 INFO L87 Difference]: Start difference. First operand 23833 states and 33689 transitions. Second operand 21 states. [2020-12-22 09:54:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:34,281 INFO L93 Difference]: Finished difference Result 140634 states and 195170 transitions. [2020-12-22 09:54:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:54:34,282 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 09:54:34,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:34,925 INFO L225 Difference]: With dead ends: 140634 [2020-12-22 09:54:34,925 INFO L226 Difference]: Without dead ends: 119096 [2020-12-22 09:54:35,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2354, Invalid=10078, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 09:54:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119096 states. [2020-12-22 09:54:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119096 to 74513. [2020-12-22 09:54:42,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74513 states. [2020-12-22 09:54:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74513 states to 74513 states and 103097 transitions. [2020-12-22 09:54:42,570 INFO L78 Accepts]: Start accepts. Automaton has 74513 states and 103097 transitions. Word has length 96 [2020-12-22 09:54:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:42,572 INFO L481 AbstractCegarLoop]: Abstraction has 74513 states and 103097 transitions. [2020-12-22 09:54:42,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 09:54:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 74513 states and 103097 transitions. [2020-12-22 09:54:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:54:42,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:42,581 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-12-22 09:54:42,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:54:42,795 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:42,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1879245087, now seen corresponding path program 1 times [2020-12-22 09:54:42,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:42,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812220656] [2020-12-22 09:54:42,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:43,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812220656] [2020-12-22 09:54:43,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262022561] [2020-12-22 09:54:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:54:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:43,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:54:43,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:54:43,636 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:54:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:43,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:54:43,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:54:43,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028027185] [2020-12-22 09:54:43,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:54:43,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:43,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:54:43,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:54:43,974 INFO L87 Difference]: Start difference. First operand 74513 states and 103097 transitions. Second operand 17 states. [2020-12-22 09:54:44,757 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:54:46,585 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-22 09:54:47,866 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:54:48,020 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:48,228 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:54:48,465 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:54:48,706 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:49,359 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:54:49,693 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:49,964 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:54:50,264 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:54:51,370 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:52,501 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:57,841 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-22 09:56:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:22,020 INFO L93 Difference]: Finished difference Result 950719 states and 1295172 transitions. [2020-12-22 09:56:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:56:22,021 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 09:56:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:24,166 INFO L225 Difference]: With dead ends: 950719 [2020-12-22 09:56:24,166 INFO L226 Difference]: Without dead ends: 878501 [2020-12-22 09:56:24,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6261 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2263, Invalid=14249, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 09:56:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878501 states. [2020-12-22 09:57:05,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878501 to 337269. [2020-12-22 09:57:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337269 states. [2020-12-22 09:57:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337269 states to 337269 states and 460161 transitions. [2020-12-22 09:57:06,596 INFO L78 Accepts]: Start accepts. Automaton has 337269 states and 460161 transitions. Word has length 97 [2020-12-22 09:57:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:06,596 INFO L481 AbstractCegarLoop]: Abstraction has 337269 states and 460161 transitions. [2020-12-22 09:57:06,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:57:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 337269 states and 460161 transitions. [2020-12-22 09:57:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:06,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:06,613 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2020-12-22 09:57:06,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:57:06,827 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:06,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:06,828 INFO L82 PathProgramCache]: Analyzing trace with hash -135405655, now seen corresponding path program 1 times [2020-12-22 09:57:06,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:06,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12300213] [2020-12-22 09:57:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:06,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12300213] [2020-12-22 09:57:06,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:06,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:06,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954380932] [2020-12-22 09:57:06,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:06,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:06,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:06,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:06,945 INFO L87 Difference]: Start difference. First operand 337269 states and 460161 transitions. Second operand 3 states.