/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.8.1.ufo.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:20:53,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:20:53,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:20:53,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:20:53,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:20:53,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:20:53,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:20:53,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:20:53,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:20:53,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:20:53,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:20:53,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:20:53,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:20:53,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:20:53,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:20:53,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:20:53,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:20:53,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:20:53,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:20:53,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:20:53,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:20:53,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:20:53,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:20:53,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:20:53,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:20:53,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:20:53,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:20:53,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:20:53,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:20:53,322 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:20:53,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:20:53,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:20:53,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:20:53,328 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:20:53,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:20:53,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:20:53,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:20:53,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:20:53,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:20:53,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:20:53,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:20:53,331 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:20:53,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:20:53,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:20:53,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:20:53,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:20:53,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:20:53,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:20:53,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:20:53,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:20:53,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:20:53,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:20:53,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:20:53,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:20:53,334 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:20:53,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:20:53,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:20:53,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:20:53,809 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:20:53,810 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:20:53,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:20:53,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/378a8d846/fce39a9a046c4c1ba896d05bb50f0843/FLAG513b1a8e4 [2020-12-22 10:20:55,080 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:20:55,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:20:55,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/378a8d846/fce39a9a046c4c1ba896d05bb50f0843/FLAG513b1a8e4 [2020-12-22 10:20:55,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/378a8d846/fce39a9a046c4c1ba896d05bb50f0843 [2020-12-22 10:20:55,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:20:55,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:20:55,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:20:55,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:20:55,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:20:55,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:20:55" (1/1) ... [2020-12-22 10:20:55,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b73a16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:55, skipping insertion in model container [2020-12-22 10:20:55,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:20:55" (1/1) ... [2020-12-22 10:20:55,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:20:55,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:20:56,099 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.8.1.ufo.UNBOUNDED.pals+Problem12_label09.c[26912,26925] [2020-12-22 10:20:56,195 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.8.1.ufo.UNBOUNDED.pals+Problem12_label09.c[34417,34430] [2020-12-22 10:20:57,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:20:57,150 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:20:57,258 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.8.1.ufo.UNBOUNDED.pals+Problem12_label09.c[26912,26925] [2020-12-22 10:20:57,269 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.8.1.ufo.UNBOUNDED.pals+Problem12_label09.c[34417,34430] [2020-12-22 10:20:57,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:20:57,954 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:20:57,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:57 WrapperNode [2020-12-22 10:20:57,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:20:57,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:20:57,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:20:57,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:20:57,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:57" (1/1) ... [2020-12-22 10:20:58,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:57" (1/1) ... [2020-12-22 10:20:58,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:20:58,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:20:58,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:20:58,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:20:58,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:57" (1/1) ... [2020-12-22 10:20:58,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:57" (1/1) ... [2020-12-22 10:20:58,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:57" (1/1) ... [2020-12-22 10:20:58,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:57" (1/1) ... [2020-12-22 10:20:58,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:57" (1/1) ... [2020-12-22 10:20:58,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:57" (1/1) ... [2020-12-22 10:20:58,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:57" (1/1) ... [2020-12-22 10:20:59,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:20:59,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:20:59,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:20:59,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:20:59,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:57" (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 10:20:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:20:59,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:20:59,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:20:59,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:21:04,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:21:04,996 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:21:05,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:21:05 BoogieIcfgContainer [2020-12-22 10:21:05,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:21:05,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:21:05,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:21:05,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:21:05,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:20:55" (1/3) ... [2020-12-22 10:21:05,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a3f8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:21:05, skipping insertion in model container [2020-12-22 10:21:05,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:57" (2/3) ... [2020-12-22 10:21:05,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a3f8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:21:05, skipping insertion in model container [2020-12-22 10:21:05,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:21:05" (3/3) ... [2020-12-22 10:21:05,015 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:21:05,023 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:21:05,030 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:21:05,052 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:21:05,088 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:21:05,088 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:21:05,088 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:21:05,089 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:21:05,089 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:21:05,089 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:21:05,089 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:21:05,089 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:21:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states. [2020-12-22 10:21:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:21:05,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:05,139 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] [2020-12-22 10:21:05,140 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:05,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:05,146 INFO L82 PathProgramCache]: Analyzing trace with hash -805214309, now seen corresponding path program 1 times [2020-12-22 10:21:05,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:05,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509240725] [2020-12-22 10:21:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:05,539 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 10:21:05,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509240725] [2020-12-22 10:21:05,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:05,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:21:05,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977748277] [2020-12-22 10:21:05,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:21:05,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:05,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:21:05,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:21:05,573 INFO L87 Difference]: Start difference. First operand 964 states. Second operand 2 states. [2020-12-22 10:21:05,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:05,681 INFO L93 Difference]: Finished difference Result 1859 states and 3514 transitions. [2020-12-22 10:21:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:21:05,683 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:21:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:05,734 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:21:05,734 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:21:05,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:21:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:21:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:21:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:21:05,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1690 transitions. [2020-12-22 10:21:05,869 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1690 transitions. Word has length 46 [2020-12-22 10:21:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:05,870 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1690 transitions. [2020-12-22 10:21:05,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:21:05,870 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1690 transitions. [2020-12-22 10:21:05,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:21:05,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:05,880 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] [2020-12-22 10:21:05,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:21:05,880 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:05,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2020-12-22 10:21:05,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:05,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101018080] [2020-12-22 10:21:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:06,115 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 10:21:06,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101018080] [2020-12-22 10:21:06,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:06,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:21:06,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324244430] [2020-12-22 10:21:06,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:21:06,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:06,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:21:06,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:21:06,122 INFO L87 Difference]: Start difference. First operand 898 states and 1690 transitions. Second operand 5 states. [2020-12-22 10:21:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:06,375 INFO L93 Difference]: Finished difference Result 979 states and 1817 transitions. [2020-12-22 10:21:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:21:06,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:21:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:06,382 INFO L225 Difference]: With dead ends: 979 [2020-12-22 10:21:06,382 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:21:06,384 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 10:21:06,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:21:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:21:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:21:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1629 transitions. [2020-12-22 10:21:06,411 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1629 transitions. Word has length 46 [2020-12-22 10:21:06,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:06,411 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1629 transitions. [2020-12-22 10:21:06,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:21:06,411 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1629 transitions. [2020-12-22 10:21:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:21:06,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:06,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:06,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:21:06,414 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:06,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:06,415 INFO L82 PathProgramCache]: Analyzing trace with hash -338813030, now seen corresponding path program 1 times [2020-12-22 10:21:06,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:06,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988071871] [2020-12-22 10:21:06,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:06,670 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 10:21:06,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988071871] [2020-12-22 10:21:06,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:06,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:06,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152461491] [2020-12-22 10:21:06,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:21:06,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:06,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:21:06,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:21:06,676 INFO L87 Difference]: Start difference. First operand 898 states and 1629 transitions. Second operand 4 states. [2020-12-22 10:21:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:18,153 INFO L93 Difference]: Finished difference Result 3153 states and 5938 transitions. [2020-12-22 10:21:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:21:18,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 10:21:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:18,167 INFO L225 Difference]: With dead ends: 3153 [2020-12-22 10:21:18,168 INFO L226 Difference]: Without dead ends: 2400 [2020-12-22 10:21:18,171 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 10:21:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2020-12-22 10:21:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2400. [2020-12-22 10:21:18,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2400 states. [2020-12-22 10:21:18,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 3743 transitions. [2020-12-22 10:21:18,245 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 3743 transitions. Word has length 67 [2020-12-22 10:21:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:18,246 INFO L481 AbstractCegarLoop]: Abstraction has 2400 states and 3743 transitions. [2020-12-22 10:21:18,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:21:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 3743 transitions. [2020-12-22 10:21:18,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:18,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:18,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:18,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:21:18,254 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:18,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:18,255 INFO L82 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2020-12-22 10:21:18,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:18,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566388906] [2020-12-22 10:21:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:18,453 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 10:21:18,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566388906] [2020-12-22 10:21:18,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:18,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:18,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021692760] [2020-12-22 10:21:18,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:18,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:18,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:18,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:18,459 INFO L87 Difference]: Start difference. First operand 2400 states and 3743 transitions. Second operand 3 states. [2020-12-22 10:21:18,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:18,527 INFO L93 Difference]: Finished difference Result 2548 states and 3979 transitions. [2020-12-22 10:21:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:18,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:18,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:18,542 INFO L225 Difference]: With dead ends: 2548 [2020-12-22 10:21:18,543 INFO L226 Difference]: Without dead ends: 2471 [2020-12-22 10:21:18,544 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 10:21:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2020-12-22 10:21:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2469. [2020-12-22 10:21:18,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2469 states. [2020-12-22 10:21:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3854 transitions. [2020-12-22 10:21:18,610 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3854 transitions. Word has length 106 [2020-12-22 10:21:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:18,611 INFO L481 AbstractCegarLoop]: Abstraction has 2469 states and 3854 transitions. [2020-12-22 10:21:18,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3854 transitions. [2020-12-22 10:21:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:18,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:18,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:18,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:21:18,613 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:18,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:18,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2020-12-22 10:21:18,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:18,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028608410] [2020-12-22 10:21:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:18,707 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 10:21:18,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028608410] [2020-12-22 10:21:18,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:18,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:18,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129368074] [2020-12-22 10:21:18,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:18,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:18,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:18,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:18,709 INFO L87 Difference]: Start difference. First operand 2469 states and 3854 transitions. Second operand 3 states. [2020-12-22 10:21:18,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:18,763 INFO L93 Difference]: Finished difference Result 2749 states and 4302 transitions. [2020-12-22 10:21:18,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:18,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:18,779 INFO L225 Difference]: With dead ends: 2749 [2020-12-22 10:21:18,779 INFO L226 Difference]: Without dead ends: 2603 [2020-12-22 10:21:18,781 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 10:21:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2020-12-22 10:21:18,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2601. [2020-12-22 10:21:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2601 states. [2020-12-22 10:21:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 4065 transitions. [2020-12-22 10:21:18,847 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 4065 transitions. Word has length 106 [2020-12-22 10:21:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:18,848 INFO L481 AbstractCegarLoop]: Abstraction has 2601 states and 4065 transitions. [2020-12-22 10:21:18,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 4065 transitions. [2020-12-22 10:21:18,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:18,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:18,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:18,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:21:18,850 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:18,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:18,850 INFO L82 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2020-12-22 10:21:18,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:18,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230165318] [2020-12-22 10:21:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:18,941 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 10:21:18,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230165318] [2020-12-22 10:21:18,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:18,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:18,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121732363] [2020-12-22 10:21:18,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:18,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:18,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:18,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:18,944 INFO L87 Difference]: Start difference. First operand 2601 states and 4065 transitions. Second operand 3 states. [2020-12-22 10:21:19,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:19,006 INFO L93 Difference]: Finished difference Result 3133 states and 4915 transitions. [2020-12-22 10:21:19,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:19,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:19,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:19,023 INFO L225 Difference]: With dead ends: 3133 [2020-12-22 10:21:19,024 INFO L226 Difference]: Without dead ends: 2855 [2020-12-22 10:21:19,025 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 10:21:19,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2020-12-22 10:21:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2853. [2020-12-22 10:21:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2853 states. [2020-12-22 10:21:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 4465 transitions. [2020-12-22 10:21:19,113 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 4465 transitions. Word has length 106 [2020-12-22 10:21:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:19,115 INFO L481 AbstractCegarLoop]: Abstraction has 2853 states and 4465 transitions. [2020-12-22 10:21:19,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 4465 transitions. [2020-12-22 10:21:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:19,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:19,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:19,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:21:19,122 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:19,123 INFO L82 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2020-12-22 10:21:19,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:19,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273545066] [2020-12-22 10:21:19,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:19,243 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 10:21:19,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273545066] [2020-12-22 10:21:19,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:19,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:19,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824533210] [2020-12-22 10:21:19,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:19,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:19,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:19,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:19,247 INFO L87 Difference]: Start difference. First operand 2853 states and 4465 transitions. Second operand 3 states. [2020-12-22 10:21:19,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:19,323 INFO L93 Difference]: Finished difference Result 3865 states and 6075 transitions. [2020-12-22 10:21:19,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:19,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:19,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:19,342 INFO L225 Difference]: With dead ends: 3865 [2020-12-22 10:21:19,342 INFO L226 Difference]: Without dead ends: 3335 [2020-12-22 10:21:19,349 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 10:21:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2020-12-22 10:21:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3333. [2020-12-22 10:21:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3333 states. [2020-12-22 10:21:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 5221 transitions. [2020-12-22 10:21:19,472 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 5221 transitions. Word has length 106 [2020-12-22 10:21:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:19,472 INFO L481 AbstractCegarLoop]: Abstraction has 3333 states and 5221 transitions. [2020-12-22 10:21:19,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:19,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 5221 transitions. [2020-12-22 10:21:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:19,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:19,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:19,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:21:19,474 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:19,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2020-12-22 10:21:19,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:19,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605517945] [2020-12-22 10:21:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:19,598 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 10:21:19,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605517945] [2020-12-22 10:21:19,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:19,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:19,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842868366] [2020-12-22 10:21:19,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:19,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:19,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:19,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:19,601 INFO L87 Difference]: Start difference. First operand 3333 states and 5221 transitions. Second operand 3 states. [2020-12-22 10:21:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:19,710 INFO L93 Difference]: Finished difference Result 5257 states and 8263 transitions. [2020-12-22 10:21:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:19,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:19,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:19,732 INFO L225 Difference]: With dead ends: 5257 [2020-12-22 10:21:19,732 INFO L226 Difference]: Without dead ends: 4247 [2020-12-22 10:21:19,736 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 10:21:19,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2020-12-22 10:21:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 4245. [2020-12-22 10:21:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4245 states. [2020-12-22 10:21:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 6645 transitions. [2020-12-22 10:21:19,902 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 6645 transitions. Word has length 106 [2020-12-22 10:21:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:19,902 INFO L481 AbstractCegarLoop]: Abstraction has 4245 states and 6645 transitions. [2020-12-22 10:21:19,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 6645 transitions. [2020-12-22 10:21:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:19,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:19,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:19,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:21:19,907 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:19,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:19,908 INFO L82 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2020-12-22 10:21:19,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:19,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941830785] [2020-12-22 10:21:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:20,099 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 10:21:20,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941830785] [2020-12-22 10:21:20,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:20,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:20,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836001106] [2020-12-22 10:21:20,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:20,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:20,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:20,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:20,103 INFO L87 Difference]: Start difference. First operand 4245 states and 6645 transitions. Second operand 3 states. [2020-12-22 10:21:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:20,284 INFO L93 Difference]: Finished difference Result 7897 states and 12375 transitions. [2020-12-22 10:21:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:20,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:20,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:20,334 INFO L225 Difference]: With dead ends: 7897 [2020-12-22 10:21:20,334 INFO L226 Difference]: Without dead ends: 5975 [2020-12-22 10:21:20,339 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 10:21:20,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5975 states. [2020-12-22 10:21:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5975 to 5973. [2020-12-22 10:21:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5973 states. [2020-12-22 10:21:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5973 states to 5973 states and 9317 transitions. [2020-12-22 10:21:20,595 INFO L78 Accepts]: Start accepts. Automaton has 5973 states and 9317 transitions. Word has length 106 [2020-12-22 10:21:20,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:20,595 INFO L481 AbstractCegarLoop]: Abstraction has 5973 states and 9317 transitions. [2020-12-22 10:21:20,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 5973 states and 9317 transitions. [2020-12-22 10:21:20,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:20,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:20,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:20,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:21:20,597 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:20,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:20,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2020-12-22 10:21:20,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:20,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412833622] [2020-12-22 10:21:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:20,692 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 10:21:20,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412833622] [2020-12-22 10:21:20,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:20,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:20,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516442954] [2020-12-22 10:21:20,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:20,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:20,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:20,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:20,694 INFO L87 Difference]: Start difference. First operand 5973 states and 9317 transitions. Second operand 3 states. [2020-12-22 10:21:21,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:21,035 INFO L93 Difference]: Finished difference Result 12889 states and 20071 transitions. [2020-12-22 10:21:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:21,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:21,059 INFO L225 Difference]: With dead ends: 12889 [2020-12-22 10:21:21,059 INFO L226 Difference]: Without dead ends: 9239 [2020-12-22 10:21:21,068 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 10:21:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9239 states. [2020-12-22 10:21:21,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9239 to 9237. [2020-12-22 10:21:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9237 states. [2020-12-22 10:21:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9237 states to 9237 states and 14309 transitions. [2020-12-22 10:21:21,547 INFO L78 Accepts]: Start accepts. Automaton has 9237 states and 14309 transitions. Word has length 106 [2020-12-22 10:21:21,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:21,548 INFO L481 AbstractCegarLoop]: Abstraction has 9237 states and 14309 transitions. [2020-12-22 10:21:21,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 9237 states and 14309 transitions. [2020-12-22 10:21:21,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:21,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:21,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:21,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:21:21,550 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2020-12-22 10:21:21,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:21,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231839626] [2020-12-22 10:21:21,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:21,754 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 10:21:21,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231839626] [2020-12-22 10:21:21,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:21,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:21,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109762426] [2020-12-22 10:21:21,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:21,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:21,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:21,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:21,756 INFO L87 Difference]: Start difference. First operand 9237 states and 14309 transitions. Second operand 10 states. [2020-12-22 10:21:27,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:27,428 INFO L93 Difference]: Finished difference Result 119861 states and 185333 transitions. [2020-12-22 10:21:27,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:21:27,428 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:21:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:27,815 INFO L225 Difference]: With dead ends: 119861 [2020-12-22 10:21:27,815 INFO L226 Difference]: Without dead ends: 112947 [2020-12-22 10:21:28,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:21:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112947 states. [2020-12-22 10:21:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112947 to 16149. [2020-12-22 10:21:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16149 states. [2020-12-22 10:21:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16149 states to 16149 states and 24741 transitions. [2020-12-22 10:21:30,189 INFO L78 Accepts]: Start accepts. Automaton has 16149 states and 24741 transitions. Word has length 106 [2020-12-22 10:21:30,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:30,189 INFO L481 AbstractCegarLoop]: Abstraction has 16149 states and 24741 transitions. [2020-12-22 10:21:30,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 16149 states and 24741 transitions. [2020-12-22 10:21:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:30,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:30,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:30,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:21:30,193 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:30,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2020-12-22 10:21:30,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:30,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316488219] [2020-12-22 10:21:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:30,314 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 10:21:30,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316488219] [2020-12-22 10:21:30,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:30,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:30,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139447926] [2020-12-22 10:21:30,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:30,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:30,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:30,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:30,320 INFO L87 Difference]: Start difference. First operand 16149 states and 24741 transitions. Second operand 3 states. [2020-12-22 10:21:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:32,189 INFO L93 Difference]: Finished difference Result 42393 states and 64551 transitions. [2020-12-22 10:21:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:32,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:21:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:32,237 INFO L225 Difference]: With dead ends: 42393 [2020-12-22 10:21:32,237 INFO L226 Difference]: Without dead ends: 28567 [2020-12-22 10:21:32,316 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 10:21:32,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28567 states. [2020-12-22 10:21:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28567 to 28309. [2020-12-22 10:21:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28309 states. [2020-12-22 10:21:34,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 42533 transitions. [2020-12-22 10:21:34,221 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 42533 transitions. Word has length 108 [2020-12-22 10:21:34,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:34,222 INFO L481 AbstractCegarLoop]: Abstraction has 28309 states and 42533 transitions. [2020-12-22 10:21:34,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 42533 transitions. [2020-12-22 10:21:34,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:34,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:34,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:34,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:21:34,224 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:34,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:34,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2020-12-22 10:21:34,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:34,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691993776] [2020-12-22 10:21:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:34,681 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 10:21:34,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691993776] [2020-12-22 10:21:34,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:34,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:34,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436770429] [2020-12-22 10:21:34,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:34,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:34,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:34,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:34,690 INFO L87 Difference]: Start difference. First operand 28309 states and 42533 transitions. Second operand 10 states. [2020-12-22 10:21:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:36,866 INFO L93 Difference]: Finished difference Result 54297 states and 81447 transitions. [2020-12-22 10:21:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:36,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:21:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:36,911 INFO L225 Difference]: With dead ends: 54297 [2020-12-22 10:21:36,911 INFO L226 Difference]: Without dead ends: 28311 [2020-12-22 10:21:36,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:21:36,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28311 states. [2020-12-22 10:21:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28311 to 28309. [2020-12-22 10:21:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28309 states. [2020-12-22 10:21:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 42277 transitions. [2020-12-22 10:21:38,721 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 42277 transitions. Word has length 108 [2020-12-22 10:21:38,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:38,721 INFO L481 AbstractCegarLoop]: Abstraction has 28309 states and 42277 transitions. [2020-12-22 10:21:38,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 42277 transitions. [2020-12-22 10:21:38,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:21:38,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:38,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:38,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:21:38,723 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:38,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:38,724 INFO L82 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2020-12-22 10:21:38,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:38,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007943737] [2020-12-22 10:21:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:38,855 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 10:21:38,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007943737] [2020-12-22 10:21:38,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:38,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:21:38,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465113486] [2020-12-22 10:21:38,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:21:38,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:21:38,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:21:38,857 INFO L87 Difference]: Start difference. First operand 28309 states and 42277 transitions. Second operand 6 states. [2020-12-22 10:21:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:40,966 INFO L93 Difference]: Finished difference Result 54295 states and 80934 transitions. [2020-12-22 10:21:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:21:40,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-12-22 10:21:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:41,005 INFO L225 Difference]: With dead ends: 54295 [2020-12-22 10:21:41,005 INFO L226 Difference]: Without dead ends: 28309 [2020-12-22 10:21:41,024 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 10:21:41,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28309 states. [2020-12-22 10:21:42,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28309 to 28309. [2020-12-22 10:21:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28309 states. [2020-12-22 10:21:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 42021 transitions. [2020-12-22 10:21:42,842 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 42021 transitions. Word has length 109 [2020-12-22 10:21:42,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:42,842 INFO L481 AbstractCegarLoop]: Abstraction has 28309 states and 42021 transitions. [2020-12-22 10:21:42,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:21:42,842 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 42021 transitions. [2020-12-22 10:21:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:21:42,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:42,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:42,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:21:42,844 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2020-12-22 10:21:42,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:42,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781084511] [2020-12-22 10:21:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:42,993 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 10:21:42,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781084511] [2020-12-22 10:21:42,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:42,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:21:42,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647307152] [2020-12-22 10:21:42,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:21:42,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:42,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:21:42,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:21:42,995 INFO L87 Difference]: Start difference. First operand 28309 states and 42021 transitions. Second operand 8 states. [2020-12-22 10:21:46,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:46,393 INFO L93 Difference]: Finished difference Result 47679 states and 70234 transitions. [2020-12-22 10:21:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:46,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:21:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:46,452 INFO L225 Difference]: With dead ends: 47679 [2020-12-22 10:21:46,452 INFO L226 Difference]: Without dead ends: 47677 [2020-12-22 10:21:46,464 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 10:21:46,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47677 states. [2020-12-22 10:21:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47677 to 29077. [2020-12-22 10:21:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29077 states. [2020-12-22 10:21:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29077 states to 29077 states and 42661 transitions. [2020-12-22 10:21:48,619 INFO L78 Accepts]: Start accepts. Automaton has 29077 states and 42661 transitions. Word has length 109 [2020-12-22 10:21:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:48,619 INFO L481 AbstractCegarLoop]: Abstraction has 29077 states and 42661 transitions. [2020-12-22 10:21:48,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:21:48,619 INFO L276 IsEmpty]: Start isEmpty. Operand 29077 states and 42661 transitions. [2020-12-22 10:21:48,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 10:21:48,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:48,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:48,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:21:48,621 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:48,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:48,622 INFO L82 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2020-12-22 10:21:48,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:48,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678565503] [2020-12-22 10:21:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:48,828 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 10:21:48,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678565503] [2020-12-22 10:21:48,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:48,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:48,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893098243] [2020-12-22 10:21:48,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:48,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:48,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:48,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:48,833 INFO L87 Difference]: Start difference. First operand 29077 states and 42661 transitions. Second operand 3 states. [2020-12-22 10:21:51,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:51,448 INFO L93 Difference]: Finished difference Result 56220 states and 82603 transitions. [2020-12-22 10:21:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:51,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 10:21:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:51,495 INFO L225 Difference]: With dead ends: 56220 [2020-12-22 10:21:51,495 INFO L226 Difference]: Without dead ends: 41625 [2020-12-22 10:21:51,506 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 10:21:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41625 states. [2020-12-22 10:21:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41625 to 41623. [2020-12-22 10:21:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41623 states. [2020-12-22 10:21:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41623 states to 41623 states and 60711 transitions. [2020-12-22 10:21:54,243 INFO L78 Accepts]: Start accepts. Automaton has 41623 states and 60711 transitions. Word has length 110 [2020-12-22 10:21:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:54,243 INFO L481 AbstractCegarLoop]: Abstraction has 41623 states and 60711 transitions. [2020-12-22 10:21:54,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:54,243 INFO L276 IsEmpty]: Start isEmpty. Operand 41623 states and 60711 transitions. [2020-12-22 10:21:54,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 10:21:54,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:54,251 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:21:54,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:21:54,251 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:54,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:54,252 INFO L82 PathProgramCache]: Analyzing trace with hash 852907853, now seen corresponding path program 1 times [2020-12-22 10:21:54,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:54,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586211338] [2020-12-22 10:21:54,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:54,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586211338] [2020-12-22 10:21:54,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:54,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:54,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958652205] [2020-12-22 10:21:54,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:21:54,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:54,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:21:54,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:21:54,415 INFO L87 Difference]: Start difference. First operand 41623 states and 60711 transitions. Second operand 4 states. [2020-12-22 10:22:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:05,133 INFO L93 Difference]: Finished difference Result 45417 states and 67074 transitions. [2020-12-22 10:22:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:22:05,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 10:22:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:05,172 INFO L225 Difference]: With dead ends: 45417 [2020-12-22 10:22:05,173 INFO L226 Difference]: Without dead ends: 43125 [2020-12-22 10:22:05,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:22:05,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43125 states. [2020-12-22 10:22:07,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43125 to 42374. [2020-12-22 10:22:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42374 states. [2020-12-22 10:22:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42374 states to 42374 states and 61464 transitions. [2020-12-22 10:22:07,886 INFO L78 Accepts]: Start accepts. Automaton has 42374 states and 61464 transitions. Word has length 138 [2020-12-22 10:22:07,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:07,887 INFO L481 AbstractCegarLoop]: Abstraction has 42374 states and 61464 transitions. [2020-12-22 10:22:07,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:22:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 42374 states and 61464 transitions. [2020-12-22 10:22:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:22:07,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:07,907 INFO L422 BasicCegarLoop]: trace histogram [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, 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 10:22:07,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:22:07,908 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:07,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:07,908 INFO L82 PathProgramCache]: Analyzing trace with hash 45078639, now seen corresponding path program 1 times [2020-12-22 10:22:07,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:07,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86811095] [2020-12-22 10:22:07,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:22:08,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86811095] [2020-12-22 10:22:08,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:08,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:08,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392865011] [2020-12-22 10:22:08,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:08,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:08,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:08,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:08,123 INFO L87 Difference]: Start difference. First operand 42374 states and 61464 transitions. Second operand 10 states. [2020-12-22 10:22:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:28,578 INFO L93 Difference]: Finished difference Result 364312 states and 528801 transitions. [2020-12-22 10:22:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:28,579 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:22:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:29,096 INFO L225 Difference]: With dead ends: 364312 [2020-12-22 10:22:29,097 INFO L226 Difference]: Without dead ends: 325014 [2020-12-22 10:22:29,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:22:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325014 states. [2020-12-22 10:22:37,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325014 to 81670. [2020-12-22 10:22:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81670 states. [2020-12-22 10:22:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81670 states to 81670 states and 118168 transitions. [2020-12-22 10:22:37,386 INFO L78 Accepts]: Start accepts. Automaton has 81670 states and 118168 transitions. Word has length 148 [2020-12-22 10:22:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:37,387 INFO L481 AbstractCegarLoop]: Abstraction has 81670 states and 118168 transitions. [2020-12-22 10:22:37,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 81670 states and 118168 transitions. [2020-12-22 10:22:37,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:22:37,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:37,409 INFO L422 BasicCegarLoop]: trace histogram [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, 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 10:22:37,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:22:37,409 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1723704177, now seen corresponding path program 1 times [2020-12-22 10:22:37,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:37,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883305964] [2020-12-22 10:22:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:22:37,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883305964] [2020-12-22 10:22:37,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:37,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:37,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975740788] [2020-12-22 10:22:37,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:37,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:37,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:37,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:37,857 INFO L87 Difference]: Start difference. First operand 81670 states and 118168 transitions. Second operand 10 states. [2020-12-22 10:23:03,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:03,441 INFO L93 Difference]: Finished difference Result 403608 states and 585505 transitions. [2020-12-22 10:23:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:03,441 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:23:03,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:04,168 INFO L225 Difference]: With dead ends: 403608 [2020-12-22 10:23:04,168 INFO L226 Difference]: Without dead ends: 364310 [2020-12-22 10:23:04,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:23:04,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364310 states. [2020-12-22 10:23:17,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364310 to 140678. [2020-12-22 10:23:17,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140678 states. [2020-12-22 10:23:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140678 states to 140678 states and 202904 transitions. [2020-12-22 10:23:17,609 INFO L78 Accepts]: Start accepts. Automaton has 140678 states and 202904 transitions. Word has length 148 [2020-12-22 10:23:17,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:17,609 INFO L481 AbstractCegarLoop]: Abstraction has 140678 states and 202904 transitions. [2020-12-22 10:23:17,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:17,609 INFO L276 IsEmpty]: Start isEmpty. Operand 140678 states and 202904 transitions. [2020-12-22 10:23:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:23:17,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:17,633 INFO L422 BasicCegarLoop]: trace histogram [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, 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 10:23:17,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:23:17,634 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:17,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:17,634 INFO L82 PathProgramCache]: Analyzing trace with hash -592064337, now seen corresponding path program 1 times [2020-12-22 10:23:17,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:17,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781028356] [2020-12-22 10:23:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:23:18,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781028356] [2020-12-22 10:23:18,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:18,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:18,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909105350] [2020-12-22 10:23:18,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:18,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:18,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:18,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:18,161 INFO L87 Difference]: Start difference. First operand 140678 states and 202904 transitions. Second operand 10 states. [2020-12-22 10:23:49,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:49,355 INFO L93 Difference]: Finished difference Result 442904 states and 642209 transitions. [2020-12-22 10:23:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:49,355 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:23:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:50,165 INFO L225 Difference]: With dead ends: 442904 [2020-12-22 10:23:50,165 INFO L226 Difference]: Without dead ends: 403606 [2020-12-22 10:23:50,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:23:50,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403606 states. [2020-12-22 10:24:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403606 to 179974. [2020-12-22 10:24:07,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179974 states. [2020-12-22 10:24:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179974 states to 179974 states and 259608 transitions. [2020-12-22 10:24:07,888 INFO L78 Accepts]: Start accepts. Automaton has 179974 states and 259608 transitions. Word has length 148 [2020-12-22 10:24:07,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:07,889 INFO L481 AbstractCegarLoop]: Abstraction has 179974 states and 259608 transitions. [2020-12-22 10:24:07,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 179974 states and 259608 transitions. [2020-12-22 10:24:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:24:07,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:07,909 INFO L422 BasicCegarLoop]: trace histogram [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, 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 10:24:07,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:24:07,910 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:07,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:07,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1827523377, now seen corresponding path program 1 times [2020-12-22 10:24:07,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:07,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433497254] [2020-12-22 10:24:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:24:08,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433497254] [2020-12-22 10:24:08,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:08,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:08,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562574925] [2020-12-22 10:24:08,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:08,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:08,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:08,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:08,557 INFO L87 Difference]: Start difference. First operand 179974 states and 259608 transitions. Second operand 10 states.