/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.ufo.BOUNDED-16.pals+Problem12_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:22:50,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:22:50,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:22:50,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:22:50,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:22:50,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:22:50,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:22:50,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:22:50,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:22:50,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:22:50,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:22:50,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:22:50,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:22:50,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:22:50,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:22:50,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:22:50,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:22:50,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:22:50,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:22:50,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:22:50,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:22:50,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:22:50,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:22:50,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:22:50,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:22:50,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:22:50,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:22:50,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:22:50,113 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:22:50,141 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:22:50,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:22:50,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:22:50,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:22:50,144 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:22:50,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:22:50,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:22:50,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:22:50,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:22:50,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:22:50,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:22:50,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:22:50,146 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:22:50,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:22:50,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:22:50,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:22:50,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:22:50,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:22:50,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:22:50,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:22:50,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:22:50,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:22:50,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:22:50,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:22:50,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:22:50,148 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:22:50,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:22:50,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:22:50,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:22:50,613 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:22:50,613 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:22:50,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label07.c [2020-12-22 10:22:50,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35777ea20/a1434ab0b5e34765b671884bf5a44fad/FLAGf51c85753 [2020-12-22 10:22:51,794 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:22:51,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label07.c [2020-12-22 10:22:51,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35777ea20/a1434ab0b5e34765b671884bf5a44fad/FLAGf51c85753 [2020-12-22 10:22:52,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35777ea20/a1434ab0b5e34765b671884bf5a44fad [2020-12-22 10:22:52,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:22:52,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:22:52,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:22:52,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:22:52,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:22:52,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:22:52" (1/1) ... [2020-12-22 10:22:52,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1366ae94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:52, skipping insertion in model container [2020-12-22 10:22:52,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:22:52" (1/1) ... [2020-12-22 10:22:52,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:22:52,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:22:53,151 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.ufo.BOUNDED-16.pals+Problem12_label07.c[26847,26860] [2020-12-22 10:22:53,188 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.ufo.BOUNDED-16.pals+Problem12_label07.c[27446,27459] [2020-12-22 10:22:54,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:22:54,141 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:22:54,239 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.ufo.BOUNDED-16.pals+Problem12_label07.c[26847,26860] [2020-12-22 10:22:54,243 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.ufo.BOUNDED-16.pals+Problem12_label07.c[27446,27459] [2020-12-22 10:22:54,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:22:55,028 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:22:55,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:55 WrapperNode [2020-12-22 10:22:55,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:22:55,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:22:55,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:22:55,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:22:55,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:55" (1/1) ... [2020-12-22 10:22:55,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:55" (1/1) ... [2020-12-22 10:22:55,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:22:55,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:22:55,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:22:55,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:22:55,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:55" (1/1) ... [2020-12-22 10:22:55,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:55" (1/1) ... [2020-12-22 10:22:55,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:55" (1/1) ... [2020-12-22 10:22:55,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:55" (1/1) ... [2020-12-22 10:22:55,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:55" (1/1) ... [2020-12-22 10:22:55,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:55" (1/1) ... [2020-12-22 10:22:56,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:55" (1/1) ... [2020-12-22 10:22:56,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:22:56,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:22:56,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:22:56,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:22:56,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:55" (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 10:22:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:22:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:22:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:22:56,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:23:02,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:23:02,224 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:23:02,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:23:02 BoogieIcfgContainer [2020-12-22 10:23:02,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:23:02,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:23:02,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:23:02,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:23:02,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:22:52" (1/3) ... [2020-12-22 10:23:02,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5d5122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:23:02, skipping insertion in model container [2020-12-22 10:23:02,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:55" (2/3) ... [2020-12-22 10:23:02,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5d5122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:23:02, skipping insertion in model container [2020-12-22 10:23:02,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:23:02" (3/3) ... [2020-12-22 10:23:02,238 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label07.c [2020-12-22 10:23:02,245 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:23:02,253 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:23:02,273 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:23:02,309 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:23:02,309 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:23:02,309 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:23:02,310 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:23:02,310 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:23:02,310 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:23:02,310 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:23:02,310 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:23:02,348 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states. [2020-12-22 10:23:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 10:23:02,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:02,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:02,356 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:02,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1822785820, now seen corresponding path program 1 times [2020-12-22 10:23:02,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:02,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865745572] [2020-12-22 10:23:02,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:02,685 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 10:23:02,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865745572] [2020-12-22 10:23:02,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:02,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:23:02,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276207022] [2020-12-22 10:23:02,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:02,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:02,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:02,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:02,711 INFO L87 Difference]: Start difference. First operand 963 states. Second operand 3 states. [2020-12-22 10:23:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:08,954 INFO L93 Difference]: Finished difference Result 2614 states and 5014 transitions. [2020-12-22 10:23:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:08,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 10:23:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:08,995 INFO L225 Difference]: With dead ends: 2614 [2020-12-22 10:23:08,995 INFO L226 Difference]: Without dead ends: 1648 [2020-12-22 10:23:09,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:09,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2020-12-22 10:23:09,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1648. [2020-12-22 10:23:09,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1648 states. [2020-12-22 10:23:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2715 transitions. [2020-12-22 10:23:09,148 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2715 transitions. Word has length 7 [2020-12-22 10:23:09,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:09,149 INFO L481 AbstractCegarLoop]: Abstraction has 1648 states and 2715 transitions. [2020-12-22 10:23:09,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:09,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2715 transitions. [2020-12-22 10:23:09,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:23:09,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:09,153 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 10:23:09,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:23:09,153 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:09,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:09,155 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:23:09,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:09,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830753926] [2020-12-22 10:23:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:09,372 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 10:23:09,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830753926] [2020-12-22 10:23:09,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:09,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:23:09,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502466778] [2020-12-22 10:23:09,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:23:09,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:09,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:23:09,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:23:09,377 INFO L87 Difference]: Start difference. First operand 1648 states and 2715 transitions. Second operand 5 states. [2020-12-22 10:23:09,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:09,546 INFO L93 Difference]: Finished difference Result 1728 states and 2840 transitions. [2020-12-22 10:23:09,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:23:09,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:23:09,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:09,558 INFO L225 Difference]: With dead ends: 1728 [2020-12-22 10:23:09,558 INFO L226 Difference]: Without dead ends: 1648 [2020-12-22 10:23:09,561 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 10:23:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2020-12-22 10:23:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1648. [2020-12-22 10:23:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1648 states. [2020-12-22 10:23:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2654 transitions. [2020-12-22 10:23:09,612 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2654 transitions. Word has length 46 [2020-12-22 10:23:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:09,612 INFO L481 AbstractCegarLoop]: Abstraction has 1648 states and 2654 transitions. [2020-12-22 10:23:09,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:23:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2654 transitions. [2020-12-22 10:23:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 10:23:09,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:09,624 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:09,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:23:09,626 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:09,629 INFO L82 PathProgramCache]: Analyzing trace with hash 59505501, now seen corresponding path program 1 times [2020-12-22 10:23:09,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:09,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924005670] [2020-12-22 10:23:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 10:23:09,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924005670] [2020-12-22 10:23:09,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:09,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:23:09,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371084692] [2020-12-22 10:23:09,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:09,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:09,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:09,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:09,890 INFO L87 Difference]: Start difference. First operand 1648 states and 2654 transitions. Second operand 3 states. [2020-12-22 10:23:15,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:15,838 INFO L93 Difference]: Finished difference Result 4654 states and 7581 transitions. [2020-12-22 10:23:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:15,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 10:23:15,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:15,859 INFO L225 Difference]: With dead ends: 4654 [2020-12-22 10:23:15,859 INFO L226 Difference]: Without dead ends: 3150 [2020-12-22 10:23:15,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2020-12-22 10:23:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 3150. [2020-12-22 10:23:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3150 states. [2020-12-22 10:23:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 4474 transitions. [2020-12-22 10:23:16,004 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 4474 transitions. Word has length 78 [2020-12-22 10:23:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:16,004 INFO L481 AbstractCegarLoop]: Abstraction has 3150 states and 4474 transitions. [2020-12-22 10:23:16,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 4474 transitions. [2020-12-22 10:23:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 10:23:16,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:16,010 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:16,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:23:16,011 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:16,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1398624595, now seen corresponding path program 1 times [2020-12-22 10:23:16,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:16,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71884493] [2020-12-22 10:23:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:23:16,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71884493] [2020-12-22 10:23:16,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:16,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:23:16,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459632232] [2020-12-22 10:23:16,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:16,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:16,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:16,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:16,188 INFO L87 Difference]: Start difference. First operand 3150 states and 4474 transitions. Second operand 3 states. [2020-12-22 10:23:21,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:21,996 INFO L93 Difference]: Finished difference Result 9160 states and 13041 transitions. [2020-12-22 10:23:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:21,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 10:23:21,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:22,028 INFO L225 Difference]: With dead ends: 9160 [2020-12-22 10:23:22,028 INFO L226 Difference]: Without dead ends: 6154 [2020-12-22 10:23:22,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:22,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2020-12-22 10:23:22,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 6154. [2020-12-22 10:23:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6154 states. [2020-12-22 10:23:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 7971 transitions. [2020-12-22 10:23:22,157 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 7971 transitions. Word has length 82 [2020-12-22 10:23:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:22,158 INFO L481 AbstractCegarLoop]: Abstraction has 6154 states and 7971 transitions. [2020-12-22 10:23:22,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:22,158 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 7971 transitions. [2020-12-22 10:23:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 10:23:22,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:22,159 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:22,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:23:22,160 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:22,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:22,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1093814204, now seen corresponding path program 1 times [2020-12-22 10:23:22,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:22,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952469916] [2020-12-22 10:23:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:23:22,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952469916] [2020-12-22 10:23:22,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:22,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:22,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213329383] [2020-12-22 10:23:22,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:23:22,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:22,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:23:22,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:23:22,409 INFO L87 Difference]: Start difference. First operand 6154 states and 7971 transitions. Second operand 4 states. [2020-12-22 10:23:31,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:31,610 INFO L93 Difference]: Finished difference Result 16670 states and 20816 transitions. [2020-12-22 10:23:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:23:31,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-12-22 10:23:31,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:31,653 INFO L225 Difference]: With dead ends: 16670 [2020-12-22 10:23:31,653 INFO L226 Difference]: Without dead ends: 10660 [2020-12-22 10:23:31,663 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 10:23:31,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10660 states. [2020-12-22 10:23:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10660 to 9909. [2020-12-22 10:23:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9909 states. [2020-12-22 10:23:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9909 states to 9909 states and 12020 transitions. [2020-12-22 10:23:31,856 INFO L78 Accepts]: Start accepts. Automaton has 9909 states and 12020 transitions. Word has length 88 [2020-12-22 10:23:31,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:31,856 INFO L481 AbstractCegarLoop]: Abstraction has 9909 states and 12020 transitions. [2020-12-22 10:23:31,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:23:31,857 INFO L276 IsEmpty]: Start isEmpty. Operand 9909 states and 12020 transitions. [2020-12-22 10:23:31,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:23:31,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:31,858 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 10:23:31,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:23:31,859 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:31,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:31,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:23:31,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:31,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318693198] [2020-12-22 10:23:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:32,003 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 10:23:32,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318693198] [2020-12-22 10:23:32,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:32,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:32,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841125968] [2020-12-22 10:23:32,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:32,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:32,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:32,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:32,006 INFO L87 Difference]: Start difference. First operand 9909 states and 12020 transitions. Second operand 3 states. [2020-12-22 10:23:32,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:32,097 INFO L93 Difference]: Finished difference Result 10055 states and 12252 transitions. [2020-12-22 10:23:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:32,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:23:32,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:32,133 INFO L225 Difference]: With dead ends: 10055 [2020-12-22 10:23:32,133 INFO L226 Difference]: Without dead ends: 9979 [2020-12-22 10:23:32,137 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 10:23:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9979 states. [2020-12-22 10:23:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9979 to 9977. [2020-12-22 10:23:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9977 states. [2020-12-22 10:23:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9977 states to 9977 states and 12129 transitions. [2020-12-22 10:23:32,411 INFO L78 Accepts]: Start accepts. Automaton has 9977 states and 12129 transitions. Word has length 106 [2020-12-22 10:23:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:32,412 INFO L481 AbstractCegarLoop]: Abstraction has 9977 states and 12129 transitions. [2020-12-22 10:23:32,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:32,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9977 states and 12129 transitions. [2020-12-22 10:23:32,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:23:32,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:32,414 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:23:32,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:23:32,415 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:32,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:23:32,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:32,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925232696] [2020-12-22 10:23:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:32,564 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 10:23:32,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925232696] [2020-12-22 10:23:32,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:32,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:32,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641959415] [2020-12-22 10:23:32,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:32,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:32,579 INFO L87 Difference]: Start difference. First operand 9977 states and 12129 transitions. Second operand 3 states. [2020-12-22 10:23:32,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:32,647 INFO L93 Difference]: Finished difference Result 10253 states and 12569 transitions. [2020-12-22 10:23:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:32,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:23:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:32,671 INFO L225 Difference]: With dead ends: 10253 [2020-12-22 10:23:32,672 INFO L226 Difference]: Without dead ends: 10109 [2020-12-22 10:23:32,676 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 10:23:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10109 states. [2020-12-22 10:23:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10109 to 10107. [2020-12-22 10:23:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10107 states. [2020-12-22 10:23:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 12336 transitions. [2020-12-22 10:23:32,872 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 12336 transitions. Word has length 106 [2020-12-22 10:23:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:32,872 INFO L481 AbstractCegarLoop]: Abstraction has 10107 states and 12336 transitions. [2020-12-22 10:23:32,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 12336 transitions. [2020-12-22 10:23:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:23:32,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:32,874 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 10:23:32,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:23:32,874 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:32,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:23:32,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:32,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149300105] [2020-12-22 10:23:32,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:32,992 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 10:23:32,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149300105] [2020-12-22 10:23:32,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:32,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:32,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662983546] [2020-12-22 10:23:32,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:32,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:32,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:32,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:32,996 INFO L87 Difference]: Start difference. First operand 10107 states and 12336 transitions. Second operand 3 states. [2020-12-22 10:23:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:33,071 INFO L93 Difference]: Finished difference Result 10631 states and 13170 transitions. [2020-12-22 10:23:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:33,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:23:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:33,094 INFO L225 Difference]: With dead ends: 10631 [2020-12-22 10:23:33,094 INFO L226 Difference]: Without dead ends: 10357 [2020-12-22 10:23:33,099 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 10:23:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10357 states. [2020-12-22 10:23:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10357 to 10355. [2020-12-22 10:23:33,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10355 states. [2020-12-22 10:23:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10355 states to 10355 states and 12728 transitions. [2020-12-22 10:23:33,298 INFO L78 Accepts]: Start accepts. Automaton has 10355 states and 12728 transitions. Word has length 106 [2020-12-22 10:23:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:33,298 INFO L481 AbstractCegarLoop]: Abstraction has 10355 states and 12728 transitions. [2020-12-22 10:23:33,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 10355 states and 12728 transitions. [2020-12-22 10:23:33,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:23:33,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:33,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:33,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:23:33,304 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:33,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:33,304 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:23:33,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:33,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747185678] [2020-12-22 10:23:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:33,430 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 10:23:33,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747185678] [2020-12-22 10:23:33,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:33,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:33,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918077647] [2020-12-22 10:23:33,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:33,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:33,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:33,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:33,436 INFO L87 Difference]: Start difference. First operand 10355 states and 12728 transitions. Second operand 3 states. [2020-12-22 10:23:33,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:33,527 INFO L93 Difference]: Finished difference Result 11351 states and 14306 transitions. [2020-12-22 10:23:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:33,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:23:33,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:33,550 INFO L225 Difference]: With dead ends: 11351 [2020-12-22 10:23:33,550 INFO L226 Difference]: Without dead ends: 10829 [2020-12-22 10:23:33,555 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 10:23:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10829 states. [2020-12-22 10:23:33,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10829 to 10827. [2020-12-22 10:23:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10827 states. [2020-12-22 10:23:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10827 states to 10827 states and 13468 transitions. [2020-12-22 10:23:33,758 INFO L78 Accepts]: Start accepts. Automaton has 10827 states and 13468 transitions. Word has length 106 [2020-12-22 10:23:33,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:33,759 INFO L481 AbstractCegarLoop]: Abstraction has 10827 states and 13468 transitions. [2020-12-22 10:23:33,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:33,759 INFO L276 IsEmpty]: Start isEmpty. Operand 10827 states and 13468 transitions. [2020-12-22 10:23:33,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:23:33,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:33,761 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 10:23:33,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:23:33,761 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:33,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:33,762 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:23:33,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:33,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235376619] [2020-12-22 10:23:33,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:33,987 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 10:23:33,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235376619] [2020-12-22 10:23:33,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:33,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:33,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833418868] [2020-12-22 10:23:33,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:33,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:33,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:33,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:33,995 INFO L87 Difference]: Start difference. First operand 10827 states and 13468 transitions. Second operand 10 states. [2020-12-22 10:23:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:35,340 INFO L93 Difference]: Finished difference Result 26731 states and 38572 transitions. [2020-12-22 10:23:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:23:35,341 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:23:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:35,399 INFO L225 Difference]: With dead ends: 26731 [2020-12-22 10:23:35,399 INFO L226 Difference]: Without dead ends: 25737 [2020-12-22 10:23:35,410 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 10:23:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25737 states. [2020-12-22 10:23:35,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25737 to 11819. [2020-12-22 10:23:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11819 states. [2020-12-22 10:23:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11819 states to 11819 states and 15004 transitions. [2020-12-22 10:23:35,807 INFO L78 Accepts]: Start accepts. Automaton has 11819 states and 15004 transitions. Word has length 106 [2020-12-22 10:23:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:35,807 INFO L481 AbstractCegarLoop]: Abstraction has 11819 states and 15004 transitions. [2020-12-22 10:23:35,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 11819 states and 15004 transitions. [2020-12-22 10:23:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:35,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:35,809 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 10:23:35,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:23:35,810 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:35,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:23:35,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:35,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381704891] [2020-12-22 10:23:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:35,907 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 10:23:35,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381704891] [2020-12-22 10:23:35,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:35,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:35,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933083496] [2020-12-22 10:23:35,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:35,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:35,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:35,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:35,912 INFO L87 Difference]: Start difference. First operand 11819 states and 15004 transitions. Second operand 3 states. [2020-12-22 10:23:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:36,171 INFO L93 Difference]: Finished difference Result 14761 states and 19600 transitions. [2020-12-22 10:23:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:36,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:36,198 INFO L225 Difference]: With dead ends: 14761 [2020-12-22 10:23:36,199 INFO L226 Difference]: Without dead ends: 12775 [2020-12-22 10:23:36,206 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 10:23:36,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12775 states. [2020-12-22 10:23:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12775 to 12773. [2020-12-22 10:23:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12773 states. [2020-12-22 10:23:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12773 states to 12773 states and 16470 transitions. [2020-12-22 10:23:36,601 INFO L78 Accepts]: Start accepts. Automaton has 12773 states and 16470 transitions. Word has length 108 [2020-12-22 10:23:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:36,602 INFO L481 AbstractCegarLoop]: Abstraction has 12773 states and 16470 transitions. [2020-12-22 10:23:36,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 12773 states and 16470 transitions. [2020-12-22 10:23:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:36,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:36,605 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 10:23:36,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:23:36,605 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:36,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:36,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:23:36,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:36,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079420779] [2020-12-22 10:23:36,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:37,210 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 10:23:37,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079420779] [2020-12-22 10:23:37,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:37,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:37,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124548070] [2020-12-22 10:23:37,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:37,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:37,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:37,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:37,213 INFO L87 Difference]: Start difference. First operand 12773 states and 16470 transitions. Second operand 10 states. [2020-12-22 10:23:37,862 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 10:23:38,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:38,278 INFO L93 Difference]: Finished difference Result 15713 states and 21040 transitions. [2020-12-22 10:23:38,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:38,279 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:23:38,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:38,304 INFO L225 Difference]: With dead ends: 15713 [2020-12-22 10:23:38,304 INFO L226 Difference]: Without dead ends: 12775 [2020-12-22 10:23:38,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:23:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12775 states. [2020-12-22 10:23:38,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12775 to 12773. [2020-12-22 10:23:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12773 states. [2020-12-22 10:23:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12773 states to 12773 states and 16446 transitions. [2020-12-22 10:23:38,675 INFO L78 Accepts]: Start accepts. Automaton has 12773 states and 16446 transitions. Word has length 108 [2020-12-22 10:23:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:38,676 INFO L481 AbstractCegarLoop]: Abstraction has 12773 states and 16446 transitions. [2020-12-22 10:23:38,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:38,676 INFO L276 IsEmpty]: Start isEmpty. Operand 12773 states and 16446 transitions. [2020-12-22 10:23:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:38,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:38,677 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 10:23:38,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:23:38,678 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:38,678 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:23:38,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:38,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042169323] [2020-12-22 10:23:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:38,779 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 10:23:38,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042169323] [2020-12-22 10:23:38,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:38,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:38,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476378263] [2020-12-22 10:23:38,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:38,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:38,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:38,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:38,786 INFO L87 Difference]: Start difference. First operand 12773 states and 16446 transitions. Second operand 3 states. [2020-12-22 10:23:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:39,239 INFO L93 Difference]: Finished difference Result 18361 states and 25056 transitions. [2020-12-22 10:23:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:39,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:39,276 INFO L225 Difference]: With dead ends: 18361 [2020-12-22 10:23:39,276 INFO L226 Difference]: Without dead ends: 15423 [2020-12-22 10:23:39,284 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 10:23:39,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15423 states. [2020-12-22 10:23:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15423 to 15421. [2020-12-22 10:23:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15421 states. [2020-12-22 10:23:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15421 states to 15421 states and 20462 transitions. [2020-12-22 10:23:39,945 INFO L78 Accepts]: Start accepts. Automaton has 15421 states and 20462 transitions. Word has length 108 [2020-12-22 10:23:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:39,945 INFO L481 AbstractCegarLoop]: Abstraction has 15421 states and 20462 transitions. [2020-12-22 10:23:39,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand 15421 states and 20462 transitions. [2020-12-22 10:23:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:39,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:39,947 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 10:23:39,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:23:39,948 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:39,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:39,948 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:23:39,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:39,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680365842] [2020-12-22 10:23:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:40,040 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 10:23:40,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680365842] [2020-12-22 10:23:40,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:40,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:40,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463013083] [2020-12-22 10:23:40,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:40,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:40,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:40,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:40,042 INFO L87 Difference]: Start difference. First operand 15421 states and 20462 transitions. Second operand 3 states. [2020-12-22 10:23:40,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:40,657 INFO L93 Difference]: Finished difference Result 26017 states and 36624 transitions. [2020-12-22 10:23:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:40,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:40,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:40,699 INFO L225 Difference]: With dead ends: 26017 [2020-12-22 10:23:40,699 INFO L226 Difference]: Without dead ends: 20431 [2020-12-22 10:23:40,712 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 10:23:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20431 states. [2020-12-22 10:23:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20431 to 20429. [2020-12-22 10:23:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20429 states. [2020-12-22 10:23:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20429 states to 20429 states and 27966 transitions. [2020-12-22 10:23:41,757 INFO L78 Accepts]: Start accepts. Automaton has 20429 states and 27966 transitions. Word has length 108 [2020-12-22 10:23:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:41,757 INFO L481 AbstractCegarLoop]: Abstraction has 20429 states and 27966 transitions. [2020-12-22 10:23:41,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 20429 states and 27966 transitions. [2020-12-22 10:23:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:41,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:41,759 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 10:23:41,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:23:41,759 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:41,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:23:41,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:41,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677238750] [2020-12-22 10:23:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:41,856 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 10:23:41,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677238750] [2020-12-22 10:23:41,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:41,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:41,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501053418] [2020-12-22 10:23:41,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:41,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:41,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:41,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:41,858 INFO L87 Difference]: Start difference. First operand 20429 states and 27966 transitions. Second operand 3 states. [2020-12-22 10:23:43,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:43,088 INFO L93 Difference]: Finished difference Result 40465 states and 58176 transitions. [2020-12-22 10:23:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:43,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:43,148 INFO L225 Difference]: With dead ends: 40465 [2020-12-22 10:23:43,148 INFO L226 Difference]: Without dead ends: 29871 [2020-12-22 10:23:43,164 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 10:23:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29871 states. [2020-12-22 10:23:44,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29871 to 29869. [2020-12-22 10:23:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29869 states. [2020-12-22 10:23:44,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29869 states to 29869 states and 41918 transitions. [2020-12-22 10:23:44,441 INFO L78 Accepts]: Start accepts. Automaton has 29869 states and 41918 transitions. Word has length 108 [2020-12-22 10:23:44,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:44,442 INFO L481 AbstractCegarLoop]: Abstraction has 29869 states and 41918 transitions. [2020-12-22 10:23:44,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 29869 states and 41918 transitions. [2020-12-22 10:23:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:44,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:44,444 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 10:23:44,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:23:44,444 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:44,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:23:44,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:44,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871641016] [2020-12-22 10:23:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:44,523 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 10:23:44,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871641016] [2020-12-22 10:23:44,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:44,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:44,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368982609] [2020-12-22 10:23:44,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:44,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:44,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:44,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:44,528 INFO L87 Difference]: Start difference. First operand 29869 states and 41918 transitions. Second operand 3 states. [2020-12-22 10:23:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:46,848 INFO L93 Difference]: Finished difference Result 67633 states and 98112 transitions. [2020-12-22 10:23:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:46,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:46,929 INFO L225 Difference]: With dead ends: 67633 [2020-12-22 10:23:46,929 INFO L226 Difference]: Without dead ends: 47599 [2020-12-22 10:23:46,961 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 10:23:47,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47599 states. [2020-12-22 10:23:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47599 to 47597. [2020-12-22 10:23:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47597 states. [2020-12-22 10:23:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47597 states to 47597 states and 67710 transitions. [2020-12-22 10:23:49,738 INFO L78 Accepts]: Start accepts. Automaton has 47597 states and 67710 transitions. Word has length 108 [2020-12-22 10:23:49,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:49,738 INFO L481 AbstractCegarLoop]: Abstraction has 47597 states and 67710 transitions. [2020-12-22 10:23:49,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 47597 states and 67710 transitions. [2020-12-22 10:23:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:23:49,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:49,740 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 10:23:49,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:23:49,740 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:49,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:49,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:23:49,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:49,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195364666] [2020-12-22 10:23:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:49,898 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 10:23:49,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195364666] [2020-12-22 10:23:49,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:49,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:23:49,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933518076] [2020-12-22 10:23:49,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:23:49,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:49,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:23:49,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:23:49,902 INFO L87 Difference]: Start difference. First operand 47597 states and 67710 transitions. Second operand 8 states. [2020-12-22 10:23:54,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:54,915 INFO L93 Difference]: Finished difference Result 79764 states and 114287 transitions. [2020-12-22 10:23:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:54,916 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:23:54,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:55,027 INFO L225 Difference]: With dead ends: 79764 [2020-12-22 10:23:55,027 INFO L226 Difference]: Without dead ends: 79762 [2020-12-22 10:23:55,049 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 10:23:55,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79762 states. [2020-12-22 10:23:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79762 to 49133. [2020-12-22 10:23:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49133 states. [2020-12-22 10:23:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49133 states to 49133 states and 69118 transitions. [2020-12-22 10:23:58,645 INFO L78 Accepts]: Start accepts. Automaton has 49133 states and 69118 transitions. Word has length 109 [2020-12-22 10:23:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:58,645 INFO L481 AbstractCegarLoop]: Abstraction has 49133 states and 69118 transitions. [2020-12-22 10:23:58,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:23:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 49133 states and 69118 transitions. [2020-12-22 10:23:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:23:58,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:58,671 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:23:58,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:23:58,671 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:58,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:58,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1243757929, now seen corresponding path program 1 times [2020-12-22 10:23:58,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:58,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863411619] [2020-12-22 10:23:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 10:23:58,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863411619] [2020-12-22 10:23:58,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:58,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:58,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821952676] [2020-12-22 10:23:58,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:58,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:58,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:58,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:58,940 INFO L87 Difference]: Start difference. First operand 49133 states and 69118 transitions. Second operand 10 states. [2020-12-22 10:24:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:19,882 INFO L93 Difference]: Finished difference Result 371071 states and 537415 transitions. [2020-12-22 10:24:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:19,883 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:24:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:20,660 INFO L225 Difference]: With dead ends: 371071 [2020-12-22 10:24:20,660 INFO L226 Difference]: Without dead ends: 331773 [2020-12-22 10:24:20,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:24:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331773 states. [2020-12-22 10:24:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331773 to 88429. [2020-12-22 10:24:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88429 states. [2020-12-22 10:24:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88429 states to 88429 states and 125950 transitions. [2020-12-22 10:24:29,043 INFO L78 Accepts]: Start accepts. Automaton has 88429 states and 125950 transitions. Word has length 149 [2020-12-22 10:24:29,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:29,043 INFO L481 AbstractCegarLoop]: Abstraction has 88429 states and 125950 transitions. [2020-12-22 10:24:29,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:29,044 INFO L276 IsEmpty]: Start isEmpty. Operand 88429 states and 125950 transitions. [2020-12-22 10:24:29,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:24:29,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:29,073 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:29,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:24:29,074 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:29,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1273280147, now seen corresponding path program 1 times [2020-12-22 10:24:29,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:29,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782307899] [2020-12-22 10:24:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:24:29,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782307899] [2020-12-22 10:24:29,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:29,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:29,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537505929] [2020-12-22 10:24:29,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:29,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:29,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:29,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:29,335 INFO L87 Difference]: Start difference. First operand 88429 states and 125950 transitions. Second operand 10 states. [2020-12-22 10:24:54,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:54,262 INFO L93 Difference]: Finished difference Result 410367 states and 594247 transitions. [2020-12-22 10:24:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:54,263 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:24:54,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:55,027 INFO L225 Difference]: With dead ends: 410367 [2020-12-22 10:24:55,027 INFO L226 Difference]: Without dead ends: 371069 [2020-12-22 10:24:55,173 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 10:24:55,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371069 states. [2020-12-22 10:25:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371069 to 147437. [2020-12-22 10:25:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147437 states. [2020-12-22 10:25:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147437 states to 147437 states and 210878 transitions. [2020-12-22 10:25:08,704 INFO L78 Accepts]: Start accepts. Automaton has 147437 states and 210878 transitions. Word has length 149 [2020-12-22 10:25:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:08,705 INFO L481 AbstractCegarLoop]: Abstraction has 147437 states and 210878 transitions. [2020-12-22 10:25:08,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:25:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 147437 states and 210878 transitions. [2020-12-22 10:25:08,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:25:08,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:08,735 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:25:08,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:25:08,736 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:08,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1546967859, now seen corresponding path program 1 times [2020-12-22 10:25:08,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:08,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527576166] [2020-12-22 10:25:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:25:08,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527576166] [2020-12-22 10:25:08,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:08,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:25:08,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226607055] [2020-12-22 10:25:08,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:25:08,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:08,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:25:08,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:25:08,968 INFO L87 Difference]: Start difference. First operand 147437 states and 210878 transitions. Second operand 10 states. [2020-12-22 10:25:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:38,951 INFO L93 Difference]: Finished difference Result 449663 states and 651079 transitions. [2020-12-22 10:25:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:38,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:25:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:39,820 INFO L225 Difference]: With dead ends: 449663 [2020-12-22 10:25:39,820 INFO L226 Difference]: Without dead ends: 410365 [2020-12-22 10:25:39,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:25:40,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410365 states. [2020-12-22 10:25:56,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410365 to 186733. [2020-12-22 10:25:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186733 states.