/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/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:04:12,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:04:12,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:04:12,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:04:12,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:04:12,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:04:12,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:04:12,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:04:12,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:04:12,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:04:12,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:04:12,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:04:12,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:04:12,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:04:12,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:04:12,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:04:12,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:04:12,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:04:12,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:04:12,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:04:12,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:04:12,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:04:12,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:04:12,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:04:12,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:04:12,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:04:12,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:04:12,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:04:12,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:04:12,329 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:04:12,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:04:12,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:04:12,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:04:12,336 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:04:12,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:04:12,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:04:12,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:04:12,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:04:12,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:04:12,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:04:12,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:04:12,340 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:04:12,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:04:12,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:04:12,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:04:12,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:04:12,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:04:12,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:04:12,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:04:12,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:04:12,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:04:12,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:04:12,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:04:12,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:04:12,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:04:12,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:04:12,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:04:12,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:04:12,848 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:04:12,848 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:04:12,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:04:12,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a8b9bba7/1421052e1ebd48a3b8abbe45213c864c/FLAG9b65d7aee [2020-12-22 08:04:13,676 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:04:13,677 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:04:13,702 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a8b9bba7/1421052e1ebd48a3b8abbe45213c864c/FLAG9b65d7aee [2020-12-22 08:04:13,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a8b9bba7/1421052e1ebd48a3b8abbe45213c864c [2020-12-22 08:04:13,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:04:13,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:04:13,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:04:13,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:04:13,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:04:13,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:04:13" (1/1) ... [2020-12-22 08:04:13,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2386f43c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:13, skipping insertion in model container [2020-12-22 08:04:13,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:04:13" (1/1) ... [2020-12-22 08:04:13,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:04:14,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:04:14,412 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/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14117,14130] [2020-12-22 08:04:14,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:04:14,590 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:04:14,722 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/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14117,14130] [2020-12-22 08:04:14,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:04:14,858 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:04:14,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:14 WrapperNode [2020-12-22 08:04:14,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:04:14,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:04:14,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:04:14,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:04:14,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:14" (1/1) ... [2020-12-22 08:04:14,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:14" (1/1) ... [2020-12-22 08:04:15,001 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:04:15,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:04:15,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:04:15,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:04:15,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:14" (1/1) ... [2020-12-22 08:04:15,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:14" (1/1) ... [2020-12-22 08:04:15,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:14" (1/1) ... [2020-12-22 08:04:15,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:14" (1/1) ... [2020-12-22 08:04:15,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:14" (1/1) ... [2020-12-22 08:04:15,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:14" (1/1) ... [2020-12-22 08:04:15,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:14" (1/1) ... [2020-12-22 08:04:15,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:04:15,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:04:15,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:04:15,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:04:15,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:14" (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 08:04:15,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:04:15,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:04:15,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:04:15,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:04:17,019 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:04:17,020 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:04:17,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:04:17 BoogieIcfgContainer [2020-12-22 08:04:17,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:04:17,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:04:17,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:04:17,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:04:17,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:04:13" (1/3) ... [2020-12-22 08:04:17,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee68a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:04:17, skipping insertion in model container [2020-12-22 08:04:17,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:14" (2/3) ... [2020-12-22 08:04:17,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee68a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:04:17, skipping insertion in model container [2020-12-22 08:04:17,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:04:17" (3/3) ... [2020-12-22 08:04:17,034 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:04:17,042 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:04:17,049 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:04:17,072 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:04:17,108 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:04:17,108 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:04:17,109 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:04:17,109 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:04:17,109 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:04:17,109 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:04:17,109 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:04:17,109 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:04:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states. [2020-12-22 08:04:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 08:04:17,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:17,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:17,223 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash 574427721, now seen corresponding path program 1 times [2020-12-22 08:04:17,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:17,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606709690] [2020-12-22 08:04:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:18,034 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 08:04:18,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606709690] [2020-12-22 08:04:18,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:18,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:18,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338989910] [2020-12-22 08:04:18,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:18,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:18,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:18,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:18,064 INFO L87 Difference]: Start difference. First operand 305 states. Second operand 3 states. [2020-12-22 08:04:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:18,319 INFO L93 Difference]: Finished difference Result 612 states and 1078 transitions. [2020-12-22 08:04:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:18,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2020-12-22 08:04:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:18,363 INFO L225 Difference]: With dead ends: 612 [2020-12-22 08:04:18,364 INFO L226 Difference]: Without dead ends: 495 [2020-12-22 08:04:18,368 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 08:04:18,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-12-22 08:04:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2020-12-22 08:04:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-12-22 08:04:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 736 transitions. [2020-12-22 08:04:18,488 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 736 transitions. Word has length 144 [2020-12-22 08:04:18,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:18,489 INFO L481 AbstractCegarLoop]: Abstraction has 493 states and 736 transitions. [2020-12-22 08:04:18,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:18,489 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 736 transitions. [2020-12-22 08:04:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 08:04:18,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:18,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:18,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:04:18,505 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:18,512 INFO L82 PathProgramCache]: Analyzing trace with hash 505056235, now seen corresponding path program 1 times [2020-12-22 08:04:18,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:18,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014367976] [2020-12-22 08:04:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:18,846 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 08:04:18,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014367976] [2020-12-22 08:04:18,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:18,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:18,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029429439] [2020-12-22 08:04:18,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:18,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:18,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:18,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:18,851 INFO L87 Difference]: Start difference. First operand 493 states and 736 transitions. Second operand 3 states. [2020-12-22 08:04:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:19,008 INFO L93 Difference]: Finished difference Result 1063 states and 1633 transitions. [2020-12-22 08:04:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:19,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2020-12-22 08:04:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:19,016 INFO L225 Difference]: With dead ends: 1063 [2020-12-22 08:04:19,017 INFO L226 Difference]: Without dead ends: 865 [2020-12-22 08:04:19,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2020-12-22 08:04:19,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2020-12-22 08:04:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2020-12-22 08:04:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1300 transitions. [2020-12-22 08:04:19,077 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1300 transitions. Word has length 144 [2020-12-22 08:04:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:19,078 INFO L481 AbstractCegarLoop]: Abstraction has 863 states and 1300 transitions. [2020-12-22 08:04:19,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1300 transitions. [2020-12-22 08:04:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 08:04:19,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:19,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:19,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:04:19,083 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:19,084 INFO L82 PathProgramCache]: Analyzing trace with hash 459957428, now seen corresponding path program 1 times [2020-12-22 08:04:19,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:19,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587057424] [2020-12-22 08:04:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:19,432 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 08:04:19,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587057424] [2020-12-22 08:04:19,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:19,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:19,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499334751] [2020-12-22 08:04:19,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:19,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:19,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:19,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:19,461 INFO L87 Difference]: Start difference. First operand 863 states and 1300 transitions. Second operand 4 states. [2020-12-22 08:04:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:19,660 INFO L93 Difference]: Finished difference Result 2524 states and 3793 transitions. [2020-12-22 08:04:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:19,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-12-22 08:04:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:19,673 INFO L225 Difference]: With dead ends: 2524 [2020-12-22 08:04:19,673 INFO L226 Difference]: Without dead ends: 1670 [2020-12-22 08:04:19,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2020-12-22 08:04:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1668. [2020-12-22 08:04:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1668 states. [2020-12-22 08:04:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2486 transitions. [2020-12-22 08:04:19,773 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2486 transitions. Word has length 144 [2020-12-22 08:04:19,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:19,781 INFO L481 AbstractCegarLoop]: Abstraction has 1668 states and 2486 transitions. [2020-12-22 08:04:19,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:19,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2486 transitions. [2020-12-22 08:04:19,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 08:04:19,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:19,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:19,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:04:19,787 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:19,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:19,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1789583768, now seen corresponding path program 1 times [2020-12-22 08:04:19,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:19,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609883244] [2020-12-22 08:04:19,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:19,915 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 08:04:19,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609883244] [2020-12-22 08:04:19,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:19,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:19,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404832316] [2020-12-22 08:04:19,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:19,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:19,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:19,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:19,922 INFO L87 Difference]: Start difference. First operand 1668 states and 2486 transitions. Second operand 3 states. [2020-12-22 08:04:20,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:20,114 INFO L93 Difference]: Finished difference Result 4966 states and 7396 transitions. [2020-12-22 08:04:20,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:20,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 145 [2020-12-22 08:04:20,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:20,133 INFO L225 Difference]: With dead ends: 4966 [2020-12-22 08:04:20,134 INFO L226 Difference]: Without dead ends: 3326 [2020-12-22 08:04:20,137 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 08:04:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2020-12-22 08:04:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 1670. [2020-12-22 08:04:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1670 states. [2020-12-22 08:04:20,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2488 transitions. [2020-12-22 08:04:20,269 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2488 transitions. Word has length 145 [2020-12-22 08:04:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:20,270 INFO L481 AbstractCegarLoop]: Abstraction has 1670 states and 2488 transitions. [2020-12-22 08:04:20,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2488 transitions. [2020-12-22 08:04:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 08:04:20,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:20,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:20,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:04:20,274 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:20,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:20,276 INFO L82 PathProgramCache]: Analyzing trace with hash 338353525, now seen corresponding path program 1 times [2020-12-22 08:04:20,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:20,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177934929] [2020-12-22 08:04:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:04:20,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177934929] [2020-12-22 08:04:20,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:20,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:20,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027960374] [2020-12-22 08:04:20,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:20,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:20,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:20,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:20,606 INFO L87 Difference]: Start difference. First operand 1670 states and 2488 transitions. Second operand 4 states. [2020-12-22 08:04:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:20,933 INFO L93 Difference]: Finished difference Result 4862 states and 7224 transitions. [2020-12-22 08:04:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:20,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-12-22 08:04:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:20,954 INFO L225 Difference]: With dead ends: 4862 [2020-12-22 08:04:20,954 INFO L226 Difference]: Without dead ends: 3222 [2020-12-22 08:04:20,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2020-12-22 08:04:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 3220. [2020-12-22 08:04:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3220 states. [2020-12-22 08:04:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3220 states to 3220 states and 4744 transitions. [2020-12-22 08:04:21,246 INFO L78 Accepts]: Start accepts. Automaton has 3220 states and 4744 transitions. Word has length 146 [2020-12-22 08:04:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:21,247 INFO L481 AbstractCegarLoop]: Abstraction has 3220 states and 4744 transitions. [2020-12-22 08:04:21,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3220 states and 4744 transitions. [2020-12-22 08:04:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 08:04:21,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:21,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:21,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:04:21,254 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:21,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1154912631, now seen corresponding path program 1 times [2020-12-22 08:04:21,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:21,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906851469] [2020-12-22 08:04:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:21,327 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 08:04:21,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906851469] [2020-12-22 08:04:21,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:21,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:21,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005375543] [2020-12-22 08:04:21,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:21,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:21,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:21,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:21,331 INFO L87 Difference]: Start difference. First operand 3220 states and 4744 transitions. Second operand 3 states. [2020-12-22 08:04:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:21,855 INFO L93 Difference]: Finished difference Result 9584 states and 14112 transitions. [2020-12-22 08:04:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:21,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2020-12-22 08:04:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:21,891 INFO L225 Difference]: With dead ends: 9584 [2020-12-22 08:04:21,891 INFO L226 Difference]: Without dead ends: 6408 [2020-12-22 08:04:21,897 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 08:04:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2020-12-22 08:04:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 3224. [2020-12-22 08:04:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3224 states. [2020-12-22 08:04:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 4748 transitions. [2020-12-22 08:04:22,286 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 4748 transitions. Word has length 147 [2020-12-22 08:04:22,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:22,287 INFO L481 AbstractCegarLoop]: Abstraction has 3224 states and 4748 transitions. [2020-12-22 08:04:22,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:22,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 4748 transitions. [2020-12-22 08:04:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 08:04:22,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:22,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:22,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:04:22,294 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:22,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:22,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2056376896, now seen corresponding path program 1 times [2020-12-22 08:04:22,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:22,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109857633] [2020-12-22 08:04:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:22,431 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 08:04:22,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109857633] [2020-12-22 08:04:22,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:22,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:22,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757006572] [2020-12-22 08:04:22,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:22,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:22,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:22,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:22,435 INFO L87 Difference]: Start difference. First operand 3224 states and 4748 transitions. Second operand 3 states. [2020-12-22 08:04:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:23,081 INFO L93 Difference]: Finished difference Result 8505 states and 12535 transitions. [2020-12-22 08:04:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:23,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-12-22 08:04:23,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:23,113 INFO L225 Difference]: With dead ends: 8505 [2020-12-22 08:04:23,114 INFO L226 Difference]: Without dead ends: 5589 [2020-12-22 08:04:23,121 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 08:04:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5589 states. [2020-12-22 08:04:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5589 to 5587. [2020-12-22 08:04:23,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5587 states. [2020-12-22 08:04:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 8109 transitions. [2020-12-22 08:04:23,646 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 8109 transitions. Word has length 148 [2020-12-22 08:04:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:23,647 INFO L481 AbstractCegarLoop]: Abstraction has 5587 states and 8109 transitions. [2020-12-22 08:04:23,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 8109 transitions. [2020-12-22 08:04:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 08:04:23,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:23,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:23,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:04:23,657 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:23,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:23,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1182249245, now seen corresponding path program 1 times [2020-12-22 08:04:23,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:23,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243382263] [2020-12-22 08:04:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:23,858 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 08:04:23,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243382263] [2020-12-22 08:04:23,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:23,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:23,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977549973] [2020-12-22 08:04:23,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:23,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:23,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:23,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:23,860 INFO L87 Difference]: Start difference. First operand 5587 states and 8109 transitions. Second operand 5 states. [2020-12-22 08:04:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:25,016 INFO L93 Difference]: Finished difference Result 16093 states and 23348 transitions. [2020-12-22 08:04:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:25,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-12-22 08:04:25,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:25,066 INFO L225 Difference]: With dead ends: 16093 [2020-12-22 08:04:25,066 INFO L226 Difference]: Without dead ends: 10543 [2020-12-22 08:04:25,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:25,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10543 states. [2020-12-22 08:04:26,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10543 to 10541. [2020-12-22 08:04:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10541 states. [2020-12-22 08:04:26,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10541 states to 10541 states and 15140 transitions. [2020-12-22 08:04:26,058 INFO L78 Accepts]: Start accepts. Automaton has 10541 states and 15140 transitions. Word has length 148 [2020-12-22 08:04:26,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:26,059 INFO L481 AbstractCegarLoop]: Abstraction has 10541 states and 15140 transitions. [2020-12-22 08:04:26,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:26,059 INFO L276 IsEmpty]: Start isEmpty. Operand 10541 states and 15140 transitions. [2020-12-22 08:04:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 08:04:26,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:26,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:26,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:04:26,079 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:26,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:26,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1313778358, now seen corresponding path program 1 times [2020-12-22 08:04:26,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:26,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573642792] [2020-12-22 08:04:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:26,316 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 08:04:26,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573642792] [2020-12-22 08:04:26,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:26,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:26,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676799212] [2020-12-22 08:04:26,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:26,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:26,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:26,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:26,319 INFO L87 Difference]: Start difference. First operand 10541 states and 15140 transitions. Second operand 4 states. [2020-12-22 08:04:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:27,382 INFO L93 Difference]: Finished difference Result 21315 states and 30516 transitions. [2020-12-22 08:04:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:27,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2020-12-22 08:04:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:27,420 INFO L225 Difference]: With dead ends: 21315 [2020-12-22 08:04:27,420 INFO L226 Difference]: Without dead ends: 10891 [2020-12-22 08:04:27,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10891 states. [2020-12-22 08:04:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10891 to 10749. [2020-12-22 08:04:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10749 states. [2020-12-22 08:04:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10749 states to 10749 states and 15368 transitions. [2020-12-22 08:04:28,356 INFO L78 Accepts]: Start accepts. Automaton has 10749 states and 15368 transitions. Word has length 148 [2020-12-22 08:04:28,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:28,356 INFO L481 AbstractCegarLoop]: Abstraction has 10749 states and 15368 transitions. [2020-12-22 08:04:28,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 10749 states and 15368 transitions. [2020-12-22 08:04:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 08:04:28,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:28,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:28,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:04:28,375 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:28,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:28,376 INFO L82 PathProgramCache]: Analyzing trace with hash -618796246, now seen corresponding path program 1 times [2020-12-22 08:04:28,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:28,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036495184] [2020-12-22 08:04:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:28,454 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 08:04:28,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036495184] [2020-12-22 08:04:28,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:28,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:28,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9826896] [2020-12-22 08:04:28,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:28,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:28,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:28,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:28,460 INFO L87 Difference]: Start difference. First operand 10749 states and 15368 transitions. Second operand 3 states. [2020-12-22 08:04:30,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:30,142 INFO L93 Difference]: Finished difference Result 31557 states and 45226 transitions. [2020-12-22 08:04:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:30,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 08:04:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:30,199 INFO L225 Difference]: With dead ends: 31557 [2020-12-22 08:04:30,199 INFO L226 Difference]: Without dead ends: 21373 [2020-12-22 08:04:30,223 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 08:04:30,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21373 states. [2020-12-22 08:04:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21373 to 10765. [2020-12-22 08:04:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10765 states. [2020-12-22 08:04:31,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10765 states to 10765 states and 15384 transitions. [2020-12-22 08:04:31,275 INFO L78 Accepts]: Start accepts. Automaton has 10765 states and 15384 transitions. Word has length 149 [2020-12-22 08:04:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:31,275 INFO L481 AbstractCegarLoop]: Abstraction has 10765 states and 15384 transitions. [2020-12-22 08:04:31,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand 10765 states and 15384 transitions. [2020-12-22 08:04:31,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 08:04:31,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:31,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:31,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:04:31,294 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:31,295 INFO L82 PathProgramCache]: Analyzing trace with hash 696847479, now seen corresponding path program 1 times [2020-12-22 08:04:31,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:31,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549558768] [2020-12-22 08:04:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:31,492 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 08:04:31,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549558768] [2020-12-22 08:04:31,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:31,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:31,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137682177] [2020-12-22 08:04:31,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:31,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:31,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:31,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:31,501 INFO L87 Difference]: Start difference. First operand 10765 states and 15384 transitions. Second operand 4 states. [2020-12-22 08:04:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:32,343 INFO L93 Difference]: Finished difference Result 21520 states and 30754 transitions. [2020-12-22 08:04:32,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:32,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-12-22 08:04:32,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:32,371 INFO L225 Difference]: With dead ends: 21520 [2020-12-22 08:04:32,372 INFO L226 Difference]: Without dead ends: 10763 [2020-12-22 08:04:32,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:32,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10763 states. [2020-12-22 08:04:33,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10763 to 10763. [2020-12-22 08:04:33,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10763 states. [2020-12-22 08:04:33,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10763 states to 10763 states and 15380 transitions. [2020-12-22 08:04:33,334 INFO L78 Accepts]: Start accepts. Automaton has 10763 states and 15380 transitions. Word has length 150 [2020-12-22 08:04:33,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:33,335 INFO L481 AbstractCegarLoop]: Abstraction has 10763 states and 15380 transitions. [2020-12-22 08:04:33,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 10763 states and 15380 transitions. [2020-12-22 08:04:33,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 08:04:33,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:33,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:33,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:04:33,355 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:33,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1219131811, now seen corresponding path program 1 times [2020-12-22 08:04:33,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:33,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889412270] [2020-12-22 08:04:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:33,487 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 08:04:33,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889412270] [2020-12-22 08:04:33,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:33,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:33,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349945823] [2020-12-22 08:04:33,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:33,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:33,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:33,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:33,490 INFO L87 Difference]: Start difference. First operand 10763 states and 15380 transitions. Second operand 3 states. [2020-12-22 08:04:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:34,830 INFO L93 Difference]: Finished difference Result 25628 states and 36743 transitions. [2020-12-22 08:04:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:34,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2020-12-22 08:04:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:34,866 INFO L225 Difference]: With dead ends: 25628 [2020-12-22 08:04:34,866 INFO L226 Difference]: Without dead ends: 15980 [2020-12-22 08:04:34,883 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 08:04:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15980 states. [2020-12-22 08:04:36,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15980 to 15978. [2020-12-22 08:04:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15978 states. [2020-12-22 08:04:36,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15978 states to 15978 states and 22453 transitions. [2020-12-22 08:04:36,148 INFO L78 Accepts]: Start accepts. Automaton has 15978 states and 22453 transitions. Word has length 150 [2020-12-22 08:04:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:36,148 INFO L481 AbstractCegarLoop]: Abstraction has 15978 states and 22453 transitions. [2020-12-22 08:04:36,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 15978 states and 22453 transitions. [2020-12-22 08:04:36,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 08:04:36,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:36,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:36,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:04:36,176 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:36,177 INFO L82 PathProgramCache]: Analyzing trace with hash 204880059, now seen corresponding path program 1 times [2020-12-22 08:04:36,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:36,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917121573] [2020-12-22 08:04:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:36,274 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 08:04:36,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917121573] [2020-12-22 08:04:36,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:36,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:36,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475562957] [2020-12-22 08:04:36,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:36,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:36,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:36,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:36,277 INFO L87 Difference]: Start difference. First operand 15978 states and 22453 transitions. Second operand 3 states. [2020-12-22 08:04:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:38,407 INFO L93 Difference]: Finished difference Result 42898 states and 61037 transitions. [2020-12-22 08:04:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:38,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2020-12-22 08:04:38,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:38,475 INFO L225 Difference]: With dead ends: 42898 [2020-12-22 08:04:38,476 INFO L226 Difference]: Without dead ends: 29628 [2020-12-22 08:04:38,501 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 08:04:38,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29628 states. [2020-12-22 08:04:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29628 to 29626. [2020-12-22 08:04:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29626 states. [2020-12-22 08:04:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29626 states to 29626 states and 41633 transitions. [2020-12-22 08:04:40,490 INFO L78 Accepts]: Start accepts. Automaton has 29626 states and 41633 transitions. Word has length 156 [2020-12-22 08:04:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:40,491 INFO L481 AbstractCegarLoop]: Abstraction has 29626 states and 41633 transitions. [2020-12-22 08:04:40,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 29626 states and 41633 transitions. [2020-12-22 08:04:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 08:04:40,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:40,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:40,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:04:40,528 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:40,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:40,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1634156586, now seen corresponding path program 1 times [2020-12-22 08:04:40,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:40,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541569202] [2020-12-22 08:04:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:40,772 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 08:04:40,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541569202] [2020-12-22 08:04:40,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:40,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:40,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617398260] [2020-12-22 08:04:40,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:40,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:40,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:40,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:40,775 INFO L87 Difference]: Start difference. First operand 29626 states and 41633 transitions. Second operand 5 states. [2020-12-22 08:04:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:44,521 INFO L93 Difference]: Finished difference Result 62146 states and 93873 transitions. [2020-12-22 08:04:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:04:44,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-12-22 08:04:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:44,642 INFO L225 Difference]: With dead ends: 62146 [2020-12-22 08:04:44,643 INFO L226 Difference]: Without dead ends: 51000 [2020-12-22 08:04:44,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:04:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51000 states. [2020-12-22 08:04:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51000 to 41346. [2020-12-22 08:04:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41346 states. [2020-12-22 08:04:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41346 states to 41346 states and 60353 transitions. [2020-12-22 08:04:47,895 INFO L78 Accepts]: Start accepts. Automaton has 41346 states and 60353 transitions. Word has length 156 [2020-12-22 08:04:47,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:47,895 INFO L481 AbstractCegarLoop]: Abstraction has 41346 states and 60353 transitions. [2020-12-22 08:04:47,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:47,896 INFO L276 IsEmpty]: Start isEmpty. Operand 41346 states and 60353 transitions. [2020-12-22 08:04:47,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 08:04:47,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:47,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:47,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:04:47,919 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:47,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:47,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1179997542, now seen corresponding path program 1 times [2020-12-22 08:04:47,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:47,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581153687] [2020-12-22 08:04:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:48,027 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 08:04:48,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581153687] [2020-12-22 08:04:48,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:48,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:48,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110340570] [2020-12-22 08:04:48,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:48,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:48,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:48,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:48,030 INFO L87 Difference]: Start difference. First operand 41346 states and 60353 transitions. Second operand 3 states. [2020-12-22 08:04:52,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:52,560 INFO L93 Difference]: Finished difference Result 96280 states and 143803 transitions. [2020-12-22 08:04:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:52,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2020-12-22 08:04:52,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:52,660 INFO L225 Difference]: With dead ends: 96280 [2020-12-22 08:04:52,661 INFO L226 Difference]: Without dead ends: 71902 [2020-12-22 08:04:52,703 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 08:04:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71902 states. [2020-12-22 08:04:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71902 to 71900. [2020-12-22 08:04:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71900 states. [2020-12-22 08:04:58,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71900 states to 71900 states and 104477 transitions. [2020-12-22 08:04:58,080 INFO L78 Accepts]: Start accepts. Automaton has 71900 states and 104477 transitions. Word has length 156 [2020-12-22 08:04:58,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:58,080 INFO L481 AbstractCegarLoop]: Abstraction has 71900 states and 104477 transitions. [2020-12-22 08:04:58,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:58,080 INFO L276 IsEmpty]: Start isEmpty. Operand 71900 states and 104477 transitions. [2020-12-22 08:04:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 08:04:58,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:58,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:58,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:04:58,119 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:58,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:58,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1679255393, now seen corresponding path program 1 times [2020-12-22 08:04:58,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:58,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30219175] [2020-12-22 08:04:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:58,287 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 08:04:58,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30219175] [2020-12-22 08:04:58,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:58,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:58,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847680090] [2020-12-22 08:04:58,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:58,290 INFO L87 Difference]: Start difference. First operand 71900 states and 104477 transitions. Second operand 4 states. [2020-12-22 08:05:03,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:03,410 INFO L93 Difference]: Finished difference Result 97540 states and 145063 transitions. [2020-12-22 08:05:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:03,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2020-12-22 08:05:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:03,523 INFO L225 Difference]: With dead ends: 97540 [2020-12-22 08:05:03,523 INFO L226 Difference]: Without dead ends: 71902 [2020-12-22 08:05:03,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:03,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71902 states. [2020-12-22 08:05:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71902 to 71900. [2020-12-22 08:05:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71900 states. [2020-12-22 08:05:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71900 states to 71900 states and 103889 transitions. [2020-12-22 08:05:08,800 INFO L78 Accepts]: Start accepts. Automaton has 71900 states and 103889 transitions. Word has length 156 [2020-12-22 08:05:08,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:08,801 INFO L481 AbstractCegarLoop]: Abstraction has 71900 states and 103889 transitions. [2020-12-22 08:05:08,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 71900 states and 103889 transitions. [2020-12-22 08:05:08,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 08:05:08,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:08,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:08,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:05:08,839 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:08,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1708318436, now seen corresponding path program 1 times [2020-12-22 08:05:08,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:08,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622294741] [2020-12-22 08:05:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:09,202 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 08:05:09,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622294741] [2020-12-22 08:05:09,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:09,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:09,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516118841] [2020-12-22 08:05:09,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:09,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:09,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:09,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:09,211 INFO L87 Difference]: Start difference. First operand 71900 states and 103889 transitions. Second operand 4 states. [2020-12-22 08:05:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:16,479 INFO L93 Difference]: Finished difference Result 176755 states and 255029 transitions. [2020-12-22 08:05:16,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:16,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2020-12-22 08:05:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:16,656 INFO L225 Difference]: With dead ends: 176755 [2020-12-22 08:05:16,656 INFO L226 Difference]: Without dead ends: 105215 [2020-12-22 08:05:16,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:05:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105215 states. [2020-12-22 08:05:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105215 to 105213. [2020-12-22 08:05:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105213 states. [2020-12-22 08:05:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105213 states to 105213 states and 149564 transitions. [2020-12-22 08:05:25,047 INFO L78 Accepts]: Start accepts. Automaton has 105213 states and 149564 transitions. Word has length 156 [2020-12-22 08:05:25,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:25,047 INFO L481 AbstractCegarLoop]: Abstraction has 105213 states and 149564 transitions. [2020-12-22 08:05:25,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:25,047 INFO L276 IsEmpty]: Start isEmpty. Operand 105213 states and 149564 transitions. [2020-12-22 08:05:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 08:05:25,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:25,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:25,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:05:25,089 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:25,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:25,089 INFO L82 PathProgramCache]: Analyzing trace with hash -26169702, now seen corresponding path program 1 times [2020-12-22 08:05:25,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:25,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168716484] [2020-12-22 08:05:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:25,264 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 08:05:25,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168716484] [2020-12-22 08:05:25,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:25,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:25,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171924494] [2020-12-22 08:05:25,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:25,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:25,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:25,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:25,266 INFO L87 Difference]: Start difference. First operand 105213 states and 149564 transitions. Second operand 4 states. [2020-12-22 08:05:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:32,443 INFO L93 Difference]: Finished difference Result 175723 states and 249826 transitions. [2020-12-22 08:05:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:32,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2020-12-22 08:05:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:32,719 INFO L225 Difference]: With dead ends: 175723 [2020-12-22 08:05:32,720 INFO L226 Difference]: Without dead ends: 94817 [2020-12-22 08:05:32,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:05:32,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94817 states. [2020-12-22 08:05:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94817 to 94817. [2020-12-22 08:05:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94817 states. [2020-12-22 08:05:39,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94817 states to 94817 states and 134779 transitions. [2020-12-22 08:05:39,891 INFO L78 Accepts]: Start accepts. Automaton has 94817 states and 134779 transitions. Word has length 158 [2020-12-22 08:05:39,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:39,891 INFO L481 AbstractCegarLoop]: Abstraction has 94817 states and 134779 transitions. [2020-12-22 08:05:39,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:39,891 INFO L276 IsEmpty]: Start isEmpty. Operand 94817 states and 134779 transitions. [2020-12-22 08:05:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 08:05:39,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:39,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:39,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:05:39,929 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:39,930 INFO L82 PathProgramCache]: Analyzing trace with hash 283259954, now seen corresponding path program 1 times [2020-12-22 08:05:39,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:39,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383380960] [2020-12-22 08:05:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:40,052 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 08:05:40,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383380960] [2020-12-22 08:05:40,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:40,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:40,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624474228] [2020-12-22 08:05:40,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:40,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:40,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:40,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:40,056 INFO L87 Difference]: Start difference. First operand 94817 states and 134779 transitions. Second operand 3 states. [2020-12-22 08:05:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:48,857 INFO L93 Difference]: Finished difference Result 171573 states and 252417 transitions. [2020-12-22 08:05:48,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:48,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2020-12-22 08:05:48,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:49,042 INFO L225 Difference]: With dead ends: 171573 [2020-12-22 08:05:49,042 INFO L226 Difference]: Without dead ends: 119987 [2020-12-22 08:05:49,098 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 08:05:49,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119987 states. [2020-12-22 08:05:58,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119987 to 111841. [2020-12-22 08:05:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111841 states. [2020-12-22 08:05:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111841 states to 111841 states and 158847 transitions. [2020-12-22 08:05:58,350 INFO L78 Accepts]: Start accepts. Automaton has 111841 states and 158847 transitions. Word has length 164 [2020-12-22 08:05:58,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:58,350 INFO L481 AbstractCegarLoop]: Abstraction has 111841 states and 158847 transitions. [2020-12-22 08:05:58,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 111841 states and 158847 transitions. [2020-12-22 08:05:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 08:05:58,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:58,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:58,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:05:58,397 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash -685720620, now seen corresponding path program 1 times [2020-12-22 08:05:58,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:58,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049435115] [2020-12-22 08:05:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:58,977 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 08:05:58,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049435115] [2020-12-22 08:05:58,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:58,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:05:58,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129515201] [2020-12-22 08:05:58,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:05:58,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:58,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:05:58,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:05:58,983 INFO L87 Difference]: Start difference. First operand 111841 states and 158847 transitions. Second operand 9 states. [2020-12-22 08:06:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:07,798 INFO L93 Difference]: Finished difference Result 183141 states and 267625 transitions. [2020-12-22 08:06:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:07,798 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 164 [2020-12-22 08:06:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:08,181 INFO L225 Difference]: With dead ends: 183141 [2020-12-22 08:06:08,182 INFO L226 Difference]: Without dead ends: 111843 [2020-12-22 08:06:08,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:06:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111843 states. [2020-12-22 08:06:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111843 to 104481. [2020-12-22 08:06:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104481 states. [2020-12-22 08:06:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104481 states to 104481 states and 146691 transitions. [2020-12-22 08:06:17,060 INFO L78 Accepts]: Start accepts. Automaton has 104481 states and 146691 transitions. Word has length 164 [2020-12-22 08:06:17,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:17,061 INFO L481 AbstractCegarLoop]: Abstraction has 104481 states and 146691 transitions. [2020-12-22 08:06:17,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:06:17,061 INFO L276 IsEmpty]: Start isEmpty. Operand 104481 states and 146691 transitions. [2020-12-22 08:06:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 08:06:17,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:17,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:17,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:06:17,101 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:17,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2128433508, now seen corresponding path program 1 times [2020-12-22 08:06:17,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:17,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501438971] [2020-12-22 08:06:17,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:17,277 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 08:06:17,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501438971] [2020-12-22 08:06:17,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:17,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:06:17,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543482662] [2020-12-22 08:06:17,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:06:17,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:17,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:06:17,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:17,280 INFO L87 Difference]: Start difference. First operand 104481 states and 146691 transitions. Second operand 5 states.