/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.7.ufo.BOUNDED-14.pals+Problem12_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:13:37,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:13:37,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:13:37,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:13:37,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:13:37,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:13:37,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:13:37,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:13:37,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:13:37,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:13:37,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:13:37,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:13:37,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:13:37,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:13:37,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:13:37,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:13:37,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:13:37,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:13:37,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:13:37,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:13:37,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:13:37,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:13:37,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:13:37,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:13:37,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:13:37,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:13:37,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:13:37,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:13:37,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:13:37,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:13:37,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:13:37,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:13:37,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:13:37,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:13:37,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:13:37,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:13:37,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:13:37,159 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:13:37,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:13:37,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:13:37,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:13:37,163 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:13:37,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:13:37,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:13:37,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:13:37,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:13:37,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:13:37,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:13:37,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:13:37,167 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:13:37,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:13:37,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:13:37,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:13:37,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:13:37,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:13:37,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:13:37,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:13:37,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:13:37,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:13:37,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:13:37,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:13:37,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:13:37,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:13:37,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:13:37,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:13:37,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:13:37,647 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:13:37,648 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:13:37,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label07.c [2020-12-22 10:13:37,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeac161ef/a702586b01824189b68250d9630113ed/FLAGaf4549b76 [2020-12-22 10:13:38,771 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:13:38,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label07.c [2020-12-22 10:13:38,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeac161ef/a702586b01824189b68250d9630113ed/FLAGaf4549b76 [2020-12-22 10:13:39,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeac161ef/a702586b01824189b68250d9630113ed [2020-12-22 10:13:39,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:13:39,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:13:39,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:13:39,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:13:39,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:13:39,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:13:39" (1/1) ... [2020-12-22 10:13:39,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72b38baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:39, skipping insertion in model container [2020-12-22 10:13:39,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:13:39" (1/1) ... [2020-12-22 10:13:39,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:13:39,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:13:39,833 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.7.ufo.BOUNDED-14.pals+Problem12_label07.c[20544,20557] [2020-12-22 10:13:39,863 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.7.ufo.BOUNDED-14.pals+Problem12_label07.c[21143,21156] [2020-12-22 10:13:40,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:13:40,933 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:13:41,013 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.7.ufo.BOUNDED-14.pals+Problem12_label07.c[20544,20557] [2020-12-22 10:13:41,016 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.7.ufo.BOUNDED-14.pals+Problem12_label07.c[21143,21156] [2020-12-22 10:13:41,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:13:41,658 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:13:41,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:41 WrapperNode [2020-12-22 10:13:41,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:13:41,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:13:41,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:13:41,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:13:41,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:41" (1/1) ... [2020-12-22 10:13:41,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:41" (1/1) ... [2020-12-22 10:13:42,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:13:42,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:13:42,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:13:42,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:13:42,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:41" (1/1) ... [2020-12-22 10:13:42,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:41" (1/1) ... [2020-12-22 10:13:42,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:41" (1/1) ... [2020-12-22 10:13:42,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:41" (1/1) ... [2020-12-22 10:13:42,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:41" (1/1) ... [2020-12-22 10:13:42,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:41" (1/1) ... [2020-12-22 10:13:42,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:41" (1/1) ... [2020-12-22 10:13:42,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:13:42,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:13:42,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:13:42,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:13:42,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:41" (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 10:13:42,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:13:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:13:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:13:42,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:13:48,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:13:48,365 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:13:48,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:13:48 BoogieIcfgContainer [2020-12-22 10:13:48,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:13:48,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:13:48,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:13:48,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:13:48,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:13:39" (1/3) ... [2020-12-22 10:13:48,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b64951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:13:48, skipping insertion in model container [2020-12-22 10:13:48,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:41" (2/3) ... [2020-12-22 10:13:48,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b64951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:13:48, skipping insertion in model container [2020-12-22 10:13:48,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:13:48" (3/3) ... [2020-12-22 10:13:48,378 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label07.c [2020-12-22 10:13:48,385 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:13:48,391 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:13:48,412 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:13:48,447 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:13:48,448 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:13:48,448 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:13:48,448 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:13:48,448 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:13:48,448 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:13:48,448 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:13:48,449 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:13:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states. [2020-12-22 10:13:48,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 10:13:48,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:48,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:48,492 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:48,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1917262015, now seen corresponding path program 1 times [2020-12-22 10:13:48,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:48,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368933983] [2020-12-22 10:13:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:48,745 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 10:13:48,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368933983] [2020-12-22 10:13:48,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:48,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:13:48,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395126539] [2020-12-22 10:13:48,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:48,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:48,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:48,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:48,775 INFO L87 Difference]: Start difference. First operand 944 states. Second operand 3 states. [2020-12-22 10:13:54,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:54,086 INFO L93 Difference]: Finished difference Result 2587 states and 4966 transitions. [2020-12-22 10:13:54,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:54,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 10:13:54,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:54,155 INFO L225 Difference]: With dead ends: 2587 [2020-12-22 10:13:54,156 INFO L226 Difference]: Without dead ends: 1629 [2020-12-22 10:13:54,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2020-12-22 10:13:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2020-12-22 10:13:54,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2020-12-22 10:13:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2560 transitions. [2020-12-22 10:13:54,375 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2560 transitions. Word has length 7 [2020-12-22 10:13:54,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:54,375 INFO L481 AbstractCegarLoop]: Abstraction has 1629 states and 2560 transitions. [2020-12-22 10:13:54,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2560 transitions. [2020-12-22 10:13:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:13:54,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:54,381 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] [2020-12-22 10:13:54,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:13:54,381 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:54,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:13:54,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:54,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327586841] [2020-12-22 10:13:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:54,634 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 10:13:54,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327586841] [2020-12-22 10:13:54,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:54,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:13:54,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400013366] [2020-12-22 10:13:54,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:13:54,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:54,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:13:54,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:13:54,643 INFO L87 Difference]: Start difference. First operand 1629 states and 2560 transitions. Second operand 5 states. [2020-12-22 10:13:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:54,758 INFO L93 Difference]: Finished difference Result 1701 states and 2672 transitions. [2020-12-22 10:13:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:13:54,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:13:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:54,769 INFO L225 Difference]: With dead ends: 1701 [2020-12-22 10:13:54,769 INFO L226 Difference]: Without dead ends: 1629 [2020-12-22 10:13:54,771 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 10:13:54,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2020-12-22 10:13:54,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2020-12-22 10:13:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2020-12-22 10:13:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2510 transitions. [2020-12-22 10:13:54,818 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2510 transitions. Word has length 42 [2020-12-22 10:13:54,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:54,819 INFO L481 AbstractCegarLoop]: Abstraction has 1629 states and 2510 transitions. [2020-12-22 10:13:54,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:13:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2510 transitions. [2020-12-22 10:13:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 10:13:54,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:54,823 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:13:54,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:13:54,823 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:54,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:54,824 INFO L82 PathProgramCache]: Analyzing trace with hash -2132636387, now seen corresponding path program 1 times [2020-12-22 10:13:54,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:54,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415412766] [2020-12-22 10:13:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:54,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415412766] [2020-12-22 10:13:54,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:54,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:54,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703272349] [2020-12-22 10:13:54,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:54,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:54,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:54,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:54,991 INFO L87 Difference]: Start difference. First operand 1629 states and 2510 transitions. Second operand 3 states. [2020-12-22 10:13:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:59,902 INFO L93 Difference]: Finished difference Result 4635 states and 7197 transitions. [2020-12-22 10:13:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:59,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 10:13:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:59,919 INFO L225 Difference]: With dead ends: 4635 [2020-12-22 10:13:59,919 INFO L226 Difference]: Without dead ends: 3131 [2020-12-22 10:13:59,923 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 10:13:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2020-12-22 10:13:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2020-12-22 10:13:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3131 states. [2020-12-22 10:14:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4588 transitions. [2020-12-22 10:14:00,003 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4588 transitions. Word has length 78 [2020-12-22 10:14:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:00,004 INFO L481 AbstractCegarLoop]: Abstraction has 3131 states and 4588 transitions. [2020-12-22 10:14:00,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4588 transitions. [2020-12-22 10:14:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:14:00,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:00,006 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:14:00,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:14:00,007 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:00,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:00,008 INFO L82 PathProgramCache]: Analyzing trace with hash -147684936, now seen corresponding path program 1 times [2020-12-22 10:14:00,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:00,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011094715] [2020-12-22 10:14:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:00,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011094715] [2020-12-22 10:14:00,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:00,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:14:00,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849881773] [2020-12-22 10:14:00,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:00,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:00,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:00,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:00,169 INFO L87 Difference]: Start difference. First operand 3131 states and 4588 transitions. Second operand 3 states. [2020-12-22 10:14:05,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:05,371 INFO L93 Difference]: Finished difference Result 9141 states and 13431 transitions. [2020-12-22 10:14:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:05,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 10:14:05,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:05,404 INFO L225 Difference]: With dead ends: 9141 [2020-12-22 10:14:05,404 INFO L226 Difference]: Without dead ends: 6135 [2020-12-22 10:14:05,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6135 states. [2020-12-22 10:14:05,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6135 to 6135. [2020-12-22 10:14:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6135 states. [2020-12-22 10:14:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6135 states to 6135 states and 8096 transitions. [2020-12-22 10:14:05,553 INFO L78 Accepts]: Start accepts. Automaton has 6135 states and 8096 transitions. Word has length 80 [2020-12-22 10:14:05,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:05,554 INFO L481 AbstractCegarLoop]: Abstraction has 6135 states and 8096 transitions. [2020-12-22 10:14:05,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 6135 states and 8096 transitions. [2020-12-22 10:14:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 10:14:05,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:05,558 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:05,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:14:05,558 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:05,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:05,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1688964846, now seen corresponding path program 1 times [2020-12-22 10:14:05,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:05,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033447409] [2020-12-22 10:14:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:05,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033447409] [2020-12-22 10:14:05,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:05,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:05,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807227425] [2020-12-22 10:14:05,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:14:05,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:05,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:14:05,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:14:05,811 INFO L87 Difference]: Start difference. First operand 6135 states and 8096 transitions. Second operand 4 states. [2020-12-22 10:14:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:14,066 INFO L93 Difference]: Finished difference Result 12896 states and 16825 transitions. [2020-12-22 10:14:14,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:14:14,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-22 10:14:14,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:14,091 INFO L225 Difference]: With dead ends: 12896 [2020-12-22 10:14:14,092 INFO L226 Difference]: Without dead ends: 6886 [2020-12-22 10:14:14,100 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 10:14:14,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6886 states. [2020-12-22 10:14:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6886 to 6886. [2020-12-22 10:14:14,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6886 states. [2020-12-22 10:14:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6886 states to 6886 states and 8733 transitions. [2020-12-22 10:14:14,236 INFO L78 Accepts]: Start accepts. Automaton has 6886 states and 8733 transitions. Word has length 84 [2020-12-22 10:14:14,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:14,237 INFO L481 AbstractCegarLoop]: Abstraction has 6886 states and 8733 transitions. [2020-12-22 10:14:14,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:14:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6886 states and 8733 transitions. [2020-12-22 10:14:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:14,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:14,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:14,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:14:14,238 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:14,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:14:14,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:14,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055256269] [2020-12-22 10:14:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:14,320 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 10:14:14,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055256269] [2020-12-22 10:14:14,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:14,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:14,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940029904] [2020-12-22 10:14:14,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:14,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:14,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:14,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:14,323 INFO L87 Difference]: Start difference. First operand 6886 states and 8733 transitions. Second operand 3 states. [2020-12-22 10:14:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:14,376 INFO L93 Difference]: Finished difference Result 7016 states and 8939 transitions. [2020-12-22 10:14:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:14,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:14,408 INFO L225 Difference]: With dead ends: 7016 [2020-12-22 10:14:14,408 INFO L226 Difference]: Without dead ends: 6948 [2020-12-22 10:14:14,411 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 10:14:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6948 states. [2020-12-22 10:14:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6948 to 6946. [2020-12-22 10:14:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6946 states. [2020-12-22 10:14:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6946 states to 6946 states and 8829 transitions. [2020-12-22 10:14:14,543 INFO L78 Accepts]: Start accepts. Automaton has 6946 states and 8829 transitions. Word has length 91 [2020-12-22 10:14:14,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:14,544 INFO L481 AbstractCegarLoop]: Abstraction has 6946 states and 8829 transitions. [2020-12-22 10:14:14,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:14,544 INFO L276 IsEmpty]: Start isEmpty. Operand 6946 states and 8829 transitions. [2020-12-22 10:14:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:14,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:14,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:14,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:14:14,546 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:14,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:14:14,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:14,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210916081] [2020-12-22 10:14:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:14,637 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 10:14:14,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210916081] [2020-12-22 10:14:14,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:14,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:14,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037960969] [2020-12-22 10:14:14,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:14,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:14,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:14,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:14,652 INFO L87 Difference]: Start difference. First operand 6946 states and 8829 transitions. Second operand 3 states. [2020-12-22 10:14:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:14,711 INFO L93 Difference]: Finished difference Result 7190 states and 9217 transitions. [2020-12-22 10:14:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:14,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:14,730 INFO L225 Difference]: With dead ends: 7190 [2020-12-22 10:14:14,730 INFO L226 Difference]: Without dead ends: 7062 [2020-12-22 10:14:14,734 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 10:14:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7062 states. [2020-12-22 10:14:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7062 to 7060. [2020-12-22 10:14:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7060 states. [2020-12-22 10:14:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 9010 transitions. [2020-12-22 10:14:14,863 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 9010 transitions. Word has length 91 [2020-12-22 10:14:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:14,863 INFO L481 AbstractCegarLoop]: Abstraction has 7060 states and 9010 transitions. [2020-12-22 10:14:14,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 9010 transitions. [2020-12-22 10:14:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:14,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:14,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:14,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:14:14,865 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:14,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:14:14,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:14,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338366124] [2020-12-22 10:14:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:14,939 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 10:14:14,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338366124] [2020-12-22 10:14:14,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:14,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:14,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243960993] [2020-12-22 10:14:14,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:14,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:14,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:14,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:14,942 INFO L87 Difference]: Start difference. First operand 7060 states and 9010 transitions. Second operand 3 states. [2020-12-22 10:14:14,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:14,999 INFO L93 Difference]: Finished difference Result 7520 states and 9740 transitions. [2020-12-22 10:14:15,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:15,000 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:15,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:15,015 INFO L225 Difference]: With dead ends: 7520 [2020-12-22 10:14:15,015 INFO L226 Difference]: Without dead ends: 7278 [2020-12-22 10:14:15,019 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 10:14:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7278 states. [2020-12-22 10:14:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7278 to 7276. [2020-12-22 10:14:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7276 states. [2020-12-22 10:14:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7276 states to 7276 states and 9350 transitions. [2020-12-22 10:14:15,145 INFO L78 Accepts]: Start accepts. Automaton has 7276 states and 9350 transitions. Word has length 91 [2020-12-22 10:14:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:15,145 INFO L481 AbstractCegarLoop]: Abstraction has 7276 states and 9350 transitions. [2020-12-22 10:14:15,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:15,146 INFO L276 IsEmpty]: Start isEmpty. Operand 7276 states and 9350 transitions. [2020-12-22 10:14:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:15,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:15,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:15,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:14:15,147 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:15,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:15,148 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:14:15,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:15,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309289961] [2020-12-22 10:14:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:15,220 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 10:14:15,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309289961] [2020-12-22 10:14:15,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:15,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:15,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542833264] [2020-12-22 10:14:15,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:15,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:15,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:15,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:15,223 INFO L87 Difference]: Start difference. First operand 7276 states and 9350 transitions. Second operand 3 states. [2020-12-22 10:14:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:15,290 INFO L93 Difference]: Finished difference Result 8144 states and 10720 transitions. [2020-12-22 10:14:15,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:15,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:15,307 INFO L225 Difference]: With dead ends: 8144 [2020-12-22 10:14:15,307 INFO L226 Difference]: Without dead ends: 7686 [2020-12-22 10:14:15,311 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 10:14:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7686 states. [2020-12-22 10:14:15,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7686 to 7684. [2020-12-22 10:14:15,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7684 states. [2020-12-22 10:14:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7684 states to 7684 states and 9986 transitions. [2020-12-22 10:14:15,451 INFO L78 Accepts]: Start accepts. Automaton has 7684 states and 9986 transitions. Word has length 91 [2020-12-22 10:14:15,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:15,452 INFO L481 AbstractCegarLoop]: Abstraction has 7684 states and 9986 transitions. [2020-12-22 10:14:15,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:15,452 INFO L276 IsEmpty]: Start isEmpty. Operand 7684 states and 9986 transitions. [2020-12-22 10:14:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:15,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:15,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:15,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:14:15,454 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:15,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:15,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:14:15,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:15,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232859036] [2020-12-22 10:14:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:15,606 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 10:14:15,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232859036] [2020-12-22 10:14:15,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:15,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:15,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046457024] [2020-12-22 10:14:15,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:15,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:15,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:15,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:15,609 INFO L87 Difference]: Start difference. First operand 7684 states and 9986 transitions. Second operand 3 states. [2020-12-22 10:14:15,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:15,712 INFO L93 Difference]: Finished difference Result 9320 states and 12548 transitions. [2020-12-22 10:14:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:15,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:15,729 INFO L225 Difference]: With dead ends: 9320 [2020-12-22 10:14:15,730 INFO L226 Difference]: Without dead ends: 8454 [2020-12-22 10:14:15,734 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 10:14:15,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8454 states. [2020-12-22 10:14:15,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8454 to 8452. [2020-12-22 10:14:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8452 states. [2020-12-22 10:14:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8452 states to 8452 states and 11170 transitions. [2020-12-22 10:14:15,896 INFO L78 Accepts]: Start accepts. Automaton has 8452 states and 11170 transitions. Word has length 91 [2020-12-22 10:14:15,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:15,897 INFO L481 AbstractCegarLoop]: Abstraction has 8452 states and 11170 transitions. [2020-12-22 10:14:15,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:15,897 INFO L276 IsEmpty]: Start isEmpty. Operand 8452 states and 11170 transitions. [2020-12-22 10:14:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:15,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:15,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:15,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:14:15,899 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:15,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:15,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:14:15,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:15,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555922050] [2020-12-22 10:14:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:16,030 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 10:14:16,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555922050] [2020-12-22 10:14:16,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:16,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:16,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274908318] [2020-12-22 10:14:16,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:16,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:16,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:16,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:16,033 INFO L87 Difference]: Start difference. First operand 8452 states and 11170 transitions. Second operand 9 states. [2020-12-22 10:14:17,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:17,251 INFO L93 Difference]: Finished difference Result 31328 states and 46800 transitions. [2020-12-22 10:14:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:14:17,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:14:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:17,301 INFO L225 Difference]: With dead ends: 31328 [2020-12-22 10:14:17,301 INFO L226 Difference]: Without dead ends: 29694 [2020-12-22 10:14:17,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:14:17,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29694 states. [2020-12-22 10:14:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29694 to 10084. [2020-12-22 10:14:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10084 states. [2020-12-22 10:14:17,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10084 states to 10084 states and 13650 transitions. [2020-12-22 10:14:17,898 INFO L78 Accepts]: Start accepts. Automaton has 10084 states and 13650 transitions. Word has length 91 [2020-12-22 10:14:17,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:17,898 INFO L481 AbstractCegarLoop]: Abstraction has 10084 states and 13650 transitions. [2020-12-22 10:14:17,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:17,898 INFO L276 IsEmpty]: Start isEmpty. Operand 10084 states and 13650 transitions. [2020-12-22 10:14:17,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:14:17,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:17,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:17,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:14:17,900 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:17,901 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:14:17,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:17,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731587889] [2020-12-22 10:14:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:17,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731587889] [2020-12-22 10:14:17,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:17,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:17,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969926451] [2020-12-22 10:14:17,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:17,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:17,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:17,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:17,970 INFO L87 Difference]: Start difference. First operand 10084 states and 13650 transitions. Second operand 3 states. [2020-12-22 10:14:18,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:18,280 INFO L93 Difference]: Finished difference Result 14906 states and 21062 transitions. [2020-12-22 10:14:18,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:18,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:14:18,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:18,305 INFO L225 Difference]: With dead ends: 14906 [2020-12-22 10:14:18,305 INFO L226 Difference]: Without dead ends: 11640 [2020-12-22 10:14:18,313 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 10:14:18,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11640 states. [2020-12-22 10:14:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11640 to 11638. [2020-12-22 10:14:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11638 states. [2020-12-22 10:14:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11638 states to 11638 states and 15988 transitions. [2020-12-22 10:14:18,708 INFO L78 Accepts]: Start accepts. Automaton has 11638 states and 15988 transitions. Word has length 93 [2020-12-22 10:14:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:18,708 INFO L481 AbstractCegarLoop]: Abstraction has 11638 states and 15988 transitions. [2020-12-22 10:14:18,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:18,708 INFO L276 IsEmpty]: Start isEmpty. Operand 11638 states and 15988 transitions. [2020-12-22 10:14:18,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:14:18,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:18,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:18,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:14:18,710 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:18,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:18,711 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:14:18,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:18,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010529939] [2020-12-22 10:14:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:19,005 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 10:14:19,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010529939] [2020-12-22 10:14:19,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:19,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:19,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353027153] [2020-12-22 10:14:19,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:19,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:19,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:19,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:19,008 INFO L87 Difference]: Start difference. First operand 11638 states and 15988 transitions. Second operand 9 states. [2020-12-22 10:14:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:19,888 INFO L93 Difference]: Finished difference Result 16458 states and 23350 transitions. [2020-12-22 10:14:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:19,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:14:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:19,914 INFO L225 Difference]: With dead ends: 16458 [2020-12-22 10:14:19,915 INFO L226 Difference]: Without dead ends: 11640 [2020-12-22 10:14:19,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:14:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11640 states. [2020-12-22 10:14:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11640 to 11638. [2020-12-22 10:14:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11638 states. [2020-12-22 10:14:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11638 states to 11638 states and 15940 transitions. [2020-12-22 10:14:20,422 INFO L78 Accepts]: Start accepts. Automaton has 11638 states and 15940 transitions. Word has length 93 [2020-12-22 10:14:20,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:20,423 INFO L481 AbstractCegarLoop]: Abstraction has 11638 states and 15940 transitions. [2020-12-22 10:14:20,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:20,423 INFO L276 IsEmpty]: Start isEmpty. Operand 11638 states and 15940 transitions. [2020-12-22 10:14:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:14:20,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:20,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:20,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:14:20,425 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:20,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:20,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:14:20,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:20,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559434274] [2020-12-22 10:14:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:20,519 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 10:14:20,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559434274] [2020-12-22 10:14:20,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:20,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:20,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824955598] [2020-12-22 10:14:20,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:20,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:20,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:20,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:20,522 INFO L87 Difference]: Start difference. First operand 11638 states and 15940 transitions. Second operand 3 states. [2020-12-22 10:14:20,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:20,984 INFO L93 Difference]: Finished difference Result 20698 states and 29606 transitions. [2020-12-22 10:14:20,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:20,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:14:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:21,016 INFO L225 Difference]: With dead ends: 20698 [2020-12-22 10:14:21,017 INFO L226 Difference]: Without dead ends: 15880 [2020-12-22 10:14:21,027 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 10:14:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15880 states. [2020-12-22 10:14:21,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15880 to 15878. [2020-12-22 10:14:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15878 states. [2020-12-22 10:14:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15878 states to 15878 states and 22196 transitions. [2020-12-22 10:14:21,602 INFO L78 Accepts]: Start accepts. Automaton has 15878 states and 22196 transitions. Word has length 93 [2020-12-22 10:14:21,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:21,602 INFO L481 AbstractCegarLoop]: Abstraction has 15878 states and 22196 transitions. [2020-12-22 10:14:21,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 15878 states and 22196 transitions. [2020-12-22 10:14:21,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:14:21,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:21,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:21,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:14:21,604 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:21,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:21,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:14:21,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:21,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862638569] [2020-12-22 10:14:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:21,678 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 10:14:21,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862638569] [2020-12-22 10:14:21,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:21,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:21,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610703561] [2020-12-22 10:14:21,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:21,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:21,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:21,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:21,681 INFO L87 Difference]: Start difference. First operand 15878 states and 22196 transitions. Second operand 3 states. [2020-12-22 10:14:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:22,560 INFO L93 Difference]: Finished difference Result 32842 states and 47414 transitions. [2020-12-22 10:14:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:22,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:14:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:22,597 INFO L225 Difference]: With dead ends: 32842 [2020-12-22 10:14:22,597 INFO L226 Difference]: Without dead ends: 23784 [2020-12-22 10:14:22,614 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 10:14:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23784 states. [2020-12-22 10:14:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23784 to 23782. [2020-12-22 10:14:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23782 states. [2020-12-22 10:14:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23782 states to 23782 states and 33652 transitions. [2020-12-22 10:14:23,732 INFO L78 Accepts]: Start accepts. Automaton has 23782 states and 33652 transitions. Word has length 93 [2020-12-22 10:14:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:23,732 INFO L481 AbstractCegarLoop]: Abstraction has 23782 states and 33652 transitions. [2020-12-22 10:14:23,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 23782 states and 33652 transitions. [2020-12-22 10:14:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:14:23,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:23,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:23,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:14:23,734 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:23,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:23,735 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:14:23,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:23,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171734642] [2020-12-22 10:14:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:23,831 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 10:14:23,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171734642] [2020-12-22 10:14:23,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:23,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:14:23,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556915359] [2020-12-22 10:14:23,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:14:23,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:23,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:14:23,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:14:23,834 INFO L87 Difference]: Start difference. First operand 23782 states and 33652 transitions. Second operand 6 states. [2020-12-22 10:14:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:25,444 INFO L93 Difference]: Finished difference Result 40744 states and 58677 transitions. [2020-12-22 10:14:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:14:25,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:14:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:25,476 INFO L225 Difference]: With dead ends: 40744 [2020-12-22 10:14:25,476 INFO L226 Difference]: Without dead ends: 23782 [2020-12-22 10:14:25,495 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 10:14:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23782 states. [2020-12-22 10:14:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23782 to 23782. [2020-12-22 10:14:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23782 states. [2020-12-22 10:14:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23782 states to 23782 states and 33396 transitions. [2020-12-22 10:14:26,846 INFO L78 Accepts]: Start accepts. Automaton has 23782 states and 33396 transitions. Word has length 94 [2020-12-22 10:14:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:26,847 INFO L481 AbstractCegarLoop]: Abstraction has 23782 states and 33396 transitions. [2020-12-22 10:14:26,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:14:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 23782 states and 33396 transitions. [2020-12-22 10:14:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:14:26,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:26,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:26,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:14:26,848 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:26,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:14:26,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:26,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728099948] [2020-12-22 10:14:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:26,941 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 10:14:26,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728099948] [2020-12-22 10:14:26,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:26,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:14:26,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953086102] [2020-12-22 10:14:26,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:14:26,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:26,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:14:26,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:14:26,943 INFO L87 Difference]: Start difference. First operand 23782 states and 33396 transitions. Second operand 6 states. [2020-12-22 10:14:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:28,042 INFO L93 Difference]: Finished difference Result 40744 states and 58165 transitions. [2020-12-22 10:14:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:14:28,043 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:14:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:28,075 INFO L225 Difference]: With dead ends: 40744 [2020-12-22 10:14:28,075 INFO L226 Difference]: Without dead ends: 23782 [2020-12-22 10:14:28,091 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 10:14:28,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23782 states. [2020-12-22 10:14:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23782 to 23782. [2020-12-22 10:14:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23782 states. [2020-12-22 10:14:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23782 states to 23782 states and 33204 transitions. [2020-12-22 10:14:29,198 INFO L78 Accepts]: Start accepts. Automaton has 23782 states and 33204 transitions. Word has length 94 [2020-12-22 10:14:29,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:29,198 INFO L481 AbstractCegarLoop]: Abstraction has 23782 states and 33204 transitions. [2020-12-22 10:14:29,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:14:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 23782 states and 33204 transitions. [2020-12-22 10:14:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:14:29,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:29,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:29,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:14:29,200 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:29,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:29,201 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:14:29,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:29,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141437269] [2020-12-22 10:14:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:29,310 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 10:14:29,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141437269] [2020-12-22 10:14:29,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:29,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:14:29,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305041873] [2020-12-22 10:14:29,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:14:29,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:29,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:14:29,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:14:29,313 INFO L87 Difference]: Start difference. First operand 23782 states and 33204 transitions. Second operand 8 states. [2020-12-22 10:14:31,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:31,254 INFO L93 Difference]: Finished difference Result 38281 states and 53854 transitions. [2020-12-22 10:14:31,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:14:31,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:14:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:31,292 INFO L225 Difference]: With dead ends: 38281 [2020-12-22 10:14:31,292 INFO L226 Difference]: Without dead ends: 38279 [2020-12-22 10:14:31,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38279 states. [2020-12-22 10:14:32,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38279 to 24550. [2020-12-22 10:14:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24550 states. [2020-12-22 10:14:32,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24550 states to 24550 states and 33908 transitions. [2020-12-22 10:14:32,759 INFO L78 Accepts]: Start accepts. Automaton has 24550 states and 33908 transitions. Word has length 94 [2020-12-22 10:14:32,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:32,759 INFO L481 AbstractCegarLoop]: Abstraction has 24550 states and 33908 transitions. [2020-12-22 10:14:32,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:14:32,760 INFO L276 IsEmpty]: Start isEmpty. Operand 24550 states and 33908 transitions. [2020-12-22 10:14:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:32,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:32,772 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 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 10:14:32,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:14:32,773 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:32,773 INFO L82 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2020-12-22 10:14:32,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:32,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083836560] [2020-12-22 10:14:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:14:32,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083836560] [2020-12-22 10:14:32,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:32,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:32,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125569963] [2020-12-22 10:14:32,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:32,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:32,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:32,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:32,945 INFO L87 Difference]: Start difference. First operand 24550 states and 33908 transitions. Second operand 9 states. [2020-12-22 10:14:40,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:40,750 INFO L93 Difference]: Finished difference Result 152118 states and 215644 transitions. [2020-12-22 10:14:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:40,751 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:40,921 INFO L225 Difference]: With dead ends: 152118 [2020-12-22 10:14:40,921 INFO L226 Difference]: Without dead ends: 134388 [2020-12-22 10:14:40,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:41,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134388 states. [2020-12-22 10:14:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134388 to 42278. [2020-12-22 10:14:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42278 states. [2020-12-22 10:14:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42278 states to 42278 states and 58996 transitions. [2020-12-22 10:14:44,749 INFO L78 Accepts]: Start accepts. Automaton has 42278 states and 58996 transitions. Word has length 130 [2020-12-22 10:14:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:44,749 INFO L481 AbstractCegarLoop]: Abstraction has 42278 states and 58996 transitions. [2020-12-22 10:14:44,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 42278 states and 58996 transitions. [2020-12-22 10:14:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:44,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:44,765 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 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 10:14:44,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:14:44,765 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:44,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1349380685, now seen corresponding path program 1 times [2020-12-22 10:14:44,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:44,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390478048] [2020-12-22 10:14:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:14:44,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390478048] [2020-12-22 10:14:44,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:44,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:44,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36860187] [2020-12-22 10:14:44,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:44,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:44,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:44,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:44,953 INFO L87 Difference]: Start difference. First operand 42278 states and 58996 transitions. Second operand 9 states. [2020-12-22 10:14:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:54,958 INFO L93 Difference]: Finished difference Result 169846 states and 240732 transitions. [2020-12-22 10:14:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:54,959 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:54,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:55,291 INFO L225 Difference]: With dead ends: 169846 [2020-12-22 10:14:55,291 INFO L226 Difference]: Without dead ends: 152116 [2020-12-22 10:14:55,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:55,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152116 states. [2020-12-22 10:15:00,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152116 to 68902. [2020-12-22 10:15:00,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68902 states. [2020-12-22 10:15:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68902 states to 68902 states and 96468 transitions. [2020-12-22 10:15:00,826 INFO L78 Accepts]: Start accepts. Automaton has 68902 states and 96468 transitions. Word has length 130 [2020-12-22 10:15:00,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:00,827 INFO L481 AbstractCegarLoop]: Abstraction has 68902 states and 96468 transitions. [2020-12-22 10:15:00,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 68902 states and 96468 transitions. [2020-12-22 10:15:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:00,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:00,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:15:00,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:15:00,842 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:00,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1476153629, now seen corresponding path program 1 times [2020-12-22 10:15:00,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:00,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021394103] [2020-12-22 10:15:00,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:15:01,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021394103] [2020-12-22 10:15:01,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:01,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:01,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070380075] [2020-12-22 10:15:01,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:01,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:01,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:01,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:01,020 INFO L87 Difference]: Start difference. First operand 68902 states and 96468 transitions. Second operand 9 states. [2020-12-22 10:15:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:13,222 INFO L93 Difference]: Finished difference Result 187574 states and 265820 transitions. [2020-12-22 10:15:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:13,222 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:13,457 INFO L225 Difference]: With dead ends: 187574 [2020-12-22 10:15:13,457 INFO L226 Difference]: Without dead ends: 169844 [2020-12-22 10:15:13,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169844 states. [2020-12-22 10:15:20,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169844 to 86630. [2020-12-22 10:15:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86630 states. [2020-12-22 10:15:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86630 states to 86630 states and 121556 transitions. [2020-12-22 10:15:20,846 INFO L78 Accepts]: Start accepts. Automaton has 86630 states and 121556 transitions. Word has length 130 [2020-12-22 10:15:20,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:20,846 INFO L481 AbstractCegarLoop]: Abstraction has 86630 states and 121556 transitions. [2020-12-22 10:15:20,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:20,847 INFO L276 IsEmpty]: Start isEmpty. Operand 86630 states and 121556 transitions. [2020-12-22 10:15:20,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:20,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:20,858 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:15:20,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:15:20,859 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:20,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:20,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1583354627, now seen corresponding path program 1 times [2020-12-22 10:15:20,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:20,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541611886] [2020-12-22 10:15:20,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:15:21,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541611886] [2020-12-22 10:15:21,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:21,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:21,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970851952] [2020-12-22 10:15:21,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:21,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:21,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:21,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:21,204 INFO L87 Difference]: Start difference. First operand 86630 states and 121556 transitions. Second operand 9 states. [2020-12-22 10:15:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:35,337 INFO L93 Difference]: Finished difference Result 205302 states and 290908 transitions. [2020-12-22 10:15:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:35,342 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:35,616 INFO L225 Difference]: With dead ends: 205302 [2020-12-22 10:15:35,616 INFO L226 Difference]: Without dead ends: 187572 [2020-12-22 10:15:35,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:35,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187572 states. [2020-12-22 10:15:44,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187572 to 104358. [2020-12-22 10:15:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104358 states. [2020-12-22 10:15:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104358 states to 104358 states and 146644 transitions. [2020-12-22 10:15:44,974 INFO L78 Accepts]: Start accepts. Automaton has 104358 states and 146644 transitions. Word has length 130 [2020-12-22 10:15:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:44,974 INFO L481 AbstractCegarLoop]: Abstraction has 104358 states and 146644 transitions. [2020-12-22 10:15:44,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 104358 states and 146644 transitions. [2020-12-22 10:15:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:44,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:44,988 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:15:44,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:15:44,989 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:44,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:44,989 INFO L82 PathProgramCache]: Analyzing trace with hash 162359075, now seen corresponding path program 1 times [2020-12-22 10:15:44,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:44,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916043523] [2020-12-22 10:15:44,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:15:45,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916043523] [2020-12-22 10:15:45,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:45,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:45,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087656690] [2020-12-22 10:15:45,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:45,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:45,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:45,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:45,159 INFO L87 Difference]: Start difference. First operand 104358 states and 146644 transitions. Second operand 9 states. [2020-12-22 10:16:02,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:02,305 INFO L93 Difference]: Finished difference Result 223030 states and 315996 transitions. [2020-12-22 10:16:02,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:02,305 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:16:02,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:02,796 INFO L225 Difference]: With dead ends: 223030 [2020-12-22 10:16:02,796 INFO L226 Difference]: Without dead ends: 205300 [2020-12-22 10:16:02,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205300 states. [2020-12-22 10:16:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205300 to 122086. [2020-12-22 10:16:14,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122086 states. [2020-12-22 10:16:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122086 states to 122086 states and 171732 transitions. [2020-12-22 10:16:14,669 INFO L78 Accepts]: Start accepts. Automaton has 122086 states and 171732 transitions. Word has length 130 [2020-12-22 10:16:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:14,670 INFO L481 AbstractCegarLoop]: Abstraction has 122086 states and 171732 transitions. [2020-12-22 10:16:14,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 122086 states and 171732 transitions. [2020-12-22 10:16:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:16:14,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:14,688 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:16:14,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:16:14,688 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:14,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:14,691 INFO L82 PathProgramCache]: Analyzing trace with hash -403461309, now seen corresponding path program 1 times [2020-12-22 10:16:14,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:14,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893056844] [2020-12-22 10:16:14,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:15,001 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-12-22 10:16:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:16:15,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893056844] [2020-12-22 10:16:15,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:15,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:15,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059815941] [2020-12-22 10:16:15,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:15,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:15,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:15,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:15,112 INFO L87 Difference]: Start difference. First operand 122086 states and 171732 transitions. Second operand 9 states. [2020-12-22 10:16:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:35,730 INFO L93 Difference]: Finished difference Result 240758 states and 341084 transitions. [2020-12-22 10:16:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:35,731 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:16:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:36,240 INFO L225 Difference]: With dead ends: 240758 [2020-12-22 10:16:36,240 INFO L226 Difference]: Without dead ends: 223028 [2020-12-22 10:16:36,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:36,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223028 states. [2020-12-22 10:16:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223028 to 139814. [2020-12-22 10:16:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139814 states. [2020-12-22 10:16:50,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139814 states to 139814 states and 196820 transitions. [2020-12-22 10:16:50,962 INFO L78 Accepts]: Start accepts. Automaton has 139814 states and 196820 transitions. Word has length 130 [2020-12-22 10:16:50,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:50,962 INFO L481 AbstractCegarLoop]: Abstraction has 139814 states and 196820 transitions. [2020-12-22 10:16:50,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:50,962 INFO L276 IsEmpty]: Start isEmpty. Operand 139814 states and 196820 transitions. [2020-12-22 10:16:50,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:16:50,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:50,981 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:16:50,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 10:16:50,981 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:50,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:50,982 INFO L82 PathProgramCache]: Analyzing trace with hash -214245533, now seen corresponding path program 1 times [2020-12-22 10:16:50,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:50,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995234501] [2020-12-22 10:16:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:16:51,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995234501] [2020-12-22 10:16:51,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:51,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:51,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031620733] [2020-12-22 10:16:51,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:51,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:51,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:51,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:51,153 INFO L87 Difference]: Start difference. First operand 139814 states and 196820 transitions. Second operand 9 states.